CN100538560C - Electronic beat tuner and control method thereof - Google Patents

Abstract

The invention discloses a kind of electronic beat sound-calibrator, comprise casing, indicating member, LCD display, push-button unit, microphone, loudspeaker and control module; The indication point that indicating member is arranged by the casing surface longitudinal is formed, and LCD display and push-button unit also are installed on the machine shell panel, and control module is directly controlled indicating member indication beat, and from loudspeaker output beat voice prompt signal; Or, judge the height of sound from the voice signal that the microphone reception is imported, the control indicating member is indicated pitch, sound is low or accuracy in pitch; Control module is also controlled LCD display display reminding information.The present invention has metronome and two kinds of functions of CALIBRATION simultaneously concurrently, both can the economize on hardware cost, saved usage space again, and no matter during in beat demonstration or tuner, all adopt the vertical indicating mode that meets common cognitive custom of people and ocular rules, greatly made things convenient for the use of electronic beat sound-calibrator.

Description

Electronic beat tuner and control method thereof

technical field

The present invention relates to an electronic sound device and its control method, in particular to an electronic beat tuner with both functions of a metronome and a tuner, and controlling the electronic beat tuner to complete the beat demonstration and tune function Methods.

Background technique

Metronome and tuner are widely used in music teaching, instrument practice and other music practice. Learning music and musical instruments is inseparable from training and mastering accurate beats. A metronome has always been an essential tool for learning music and musical instruments; Accuracy will affect the judgment of the sound level and the sense of music, so before practicing, you must use a tuner to tune the instrument you are learning and playing.

With the development of modern electronic technology, music creation, performance and music teaching have more and higher requirements for the enrichment and improvement of the sound and rhythm of music works. The traditional mechanical or analog mechanical metronome and a single twelve-average However, the existing electronic metronome and electronic tuner only have beat demo or electronic tuner. The function of tuning, the function is relatively single, which is not conducive to reducing costs. If there is an electronic beat tuner that has two functions of beat demonstration or tuning, and organically combines the beat demonstration indicator and the tune demonstration indicator , it can be achieved that the size and production cost are similar to those of a single-function electronic metronome or tuner, and will definitely be welcomed by users and achieve good social and economic benefits.

Combining the electronic metronome and the tuner into one is not simply merging the parts of the two, but the control unit, control method, and display symbol content of the entire electronic metronome must change accordingly. So this has always been a difficult problem for producers and users of electronic metronomes and tuners.

Contents of the invention

A technical problem to be solved by the present invention is to provide an electronic beat tuner, which has both the functions of a metronome and a tuner; The indication unit composed of the indication points together.

Another technical problem to be solved by the present invention is to provide an electronic beat tuner, which has both the functions of a metronome and a tuner; indicating unit.

Another technical problem to be solved by the present invention is to provide a control method for controlling the electronic beat tuner to complete the beat demonstration and sound calibration functions.

Technical scheme of the present invention is as follows:

An electronic beat tuner, comprising: a casing, an LCD display, an indication unit, a key unit, a microphone, a loudspeaker and a control unit;

The indicating unit is composed of indicating points arranged linearly on the surface of the casing, and the LCD display and the key unit are installed on the casing panel;

The microphone and the speaker are installed in the casing, and a microphone sound hole and a speaker sound hole are arranged at corresponding positions on the casing panel;

The control unit includes: a central processing unit, an LCD display circuit, an indicating circuit, a button circuit, a sound receiving and processing circuit and an audio output circuit;

The input of the button circuit is connected to the button unit, and the output of the button circuit is connected to the central processing unit, which is used to transmit the information that the button is pressed to the central processing unit;

The input of the sound receiving and processing circuit is connected to the microphone, and the received sound signal is filtered and amplified and output to the input end of the central processing unit;

The indicating circuit receives the control signal of the central processing unit, and controls the indicating unit to indicate the beat or pitch, pitch and pitch;

The LCD display circuit receives the output information of the central processing unit and outputs it to the LCD display;

The audio output circuit receives the output audio signal of the central processing unit, amplifies it and outputs it to the loudspeaker output;

The central processing unit is responsible for signal analysis and processing, and outputs control signals and audio signals, which is the core of the present invention;

The present invention can enter the tuner mode through the key unit, under this mode, the central processing unit measures the pitch of the sound input by the sound receiving and processing circuit, and the control indicating unit indicates according to how much the sound is higher/lower than the standard tone Pitch, pitch or pitch; control LCD display to display status information;

The present invention can enter the metronome mode through the button unit, under this mode, the central processing unit outputs the audio signal to the audio output circuit, drives the loudspeaker to play the tempo prompt sound, and simultaneously controls the indication unit to indicate the tempo according to the parameters set by the tempo, and passes The LCD display shows status information.

Another electronic beat tuner of the present invention includes: a casing, an LCD display, a key unit, a microphone, a loudspeaker and a control unit;

The LCD display includes an indicating unit formed of liquid crystal display segments arranged in a specific display area of the LCD display as indicating points, and the LCD display and the key unit are installed on the casing panel;

The microphone and the speaker are installed in the casing, and a microphone sound hole and a speaker sound hole are arranged at corresponding positions on the casing panel;

The control unit includes: a central processing unit, an LCD display circuit, a button circuit, a sound receiving and processing circuit and an audio output circuit;

The input of the button circuit is connected to the button unit, and the output of the button circuit is connected to the central processing unit, which is used to transmit the information that the button is pressed to the central processing unit;

The input of the sound receiving and processing circuit is connected to the microphone, and the received sound signal is filtered and amplified and output to the input end of the central processing unit;

The audio output circuit receives the output audio signal of the central processing unit, amplifies it and outputs it to the loudspeaker output;

The LCD display circuit receives the output information of the central processing unit, outputs it to the LCD display, receives the control signal output by the central processing unit, and controls the indicating point of the indicating unit on the LCD display to indicate beat or pitch, pitch and pitch;

The central processing unit is responsible for analyzing and processing signals, outputting control signals and audio signals;

The present invention can be entered into the tuner mode through the key unit, and in this mode, the central processing unit measures the level of the input sound, and controls the indication unit of the LCD display to indicate the pitch and the pitch according to how high/low the standard tone is. or pitch; control the LCD display to display status information;

The present invention can enter the metronome mode through the button unit, and in this mode, the central processing unit outputs the audio signal to the audio output circuit, drives the loudspeaker to play the tempo prompt sound, and simultaneously controls the indication unit of the LCD display to indicate the tempo according to the set parameters, and Status information is displayed via the LCD display.

The control method of the electronic beat tuner of the present invention comprises the following steps:

Step 1. Power on, system initialization;

Step 2. Scan to determine whether there is a button command to switch to the metronome mode. If it is converted to the metronome mode, perform step 4; otherwise, directly enter the tuner mode and perform step 3;

Step 3. Obtain the tuning parameter information, analyze the input sound, convert the analysis result into a control signal, control the indicating unit to indicate pitch, pitch or pitch, and control the LCD display to display status information. Under the prompt of the display, it is required to change the indicating unit to select the # or b display mode, then change the # or b display mode;

Step 4: Obtain the tempo information of the demonstration, set the parameters, output the required tempo audio signal to drive the speaker to play the tempo prompt, and control the indicating unit to indicate the tempo, and control the LCD display to display the status information;

Step 5. If the shutdown command is detected, turn off the beat tuner and enter the sleep standby state.

The electronic beat tuner of the present invention, by using the single-chip microcomputer as the core central processing unit and cooperating with other functional circuits, completes the control functions of various equipment, and realizes the two functions of the metronome and the tuner in the same device. It can not only save the hardware cost, but also save the use space, and it greatly facilitates the use of the electronic beat tuner by adopting the vertical indication method that conforms to people's common cognitive habits and visual rules no matter in the beat demonstration or tuning.

Description of drawings

Fig. 1 is the outline schematic diagram of the embodiment of the indicating unit that adopts small light bulb or light-emitting diode to form in the present invention;

Fig. 2 is the circuit schematic diagram of the embodiment of the indicating unit that adopts small light bulb or LED to form in the present invention;

Fig. 3 is a schematic diagram of the multi-part demonstration 2:3 sound principle of the present invention;

Fig. 4 is a schematic diagram of the multi-part demonstration 2:4 sound principle of the present invention;

Fig. 5 is a schematic outline of an embodiment of an indicating unit composed of display segments on an LCD display in the present invention;

FIG. 6 is a schematic circuit diagram of an embodiment of an indicating unit composed of display segments on an LCD display according to the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the technical scheme of the present invention is described in further detail:

Example 1:

The electronic beat tuner of Embodiment 1 of the present invention, as shown in Figure 1, comprises: a casing 1, indicator unit 2, LCD display 3, button unit 4, microphone, loudspeaker and control unit;

The indicating unit 2 is composed of indicating points 5 arranged in a line on the panel of the casing 1. The indicating points 5 can be light-emitting diodes or small light bulbs; the line-shaped arrangement means that all the light-emitting diodes or small light bulbs have an overall direction after being arranged. , but not necessarily arranged in a straight line as shown in Figure 1. Light-emitting diodes or small bulbs are in the indication state when they light up, and they are in the non-indication state if they do not light up;

LCD display 3 and button unit 4 are also installed on the panel of casing 1; Described casing panel is provided with microphone pickup hole 6 and loudspeaker sound hole 7, and microphone pickup hole 6 and speaker sound hole in casing 7. A microphone and a loudspeaker are installed at the corresponding position behind;

The control unit of the electronic beat tuner according to Embodiment 1 of the present invention, as shown in FIG. 2 , includes: a central processing unit 100, an indicating circuit 101, an LCD display circuit 102, a button circuit 103, a sound receiving and processing circuit 104 and an audio output circuit 105;

The input of described button circuit 103 is connected with button unit, and the output of button circuit 103 is connected with central processing unit 100, is used for sending the information that button is pressed to central processing unit 100; The input of described sound reception processing circuit 104 is connected with The microphone is connected, and the received sound signal is filtered and amplified and output to the input end of the central processing unit 100; the audio output circuit 105 receives the output audio signal of the central processing unit, amplified and output to the speaker output;

The indicator circuit 101 receives the control signal from the central processor 100, and controls the light of the indicator point of the indicator unit; the LCD display circuit 102 receives the output information from the central processor 100, and outputs it to the LCD display;

The central processing unit 100 is the core part of the control unit of the present invention. After starting up, the central processing unit controls the entire circuit to enter the tuner working state; the circuit can be switched to the metronome state through the key unit.

In the tuner state, the central processing unit receives musical instruments or other sounds input by the microphone, then performs frequency measurement and spectrum analysis, and then calculates group sequence, sound name and cent deviation according to the results of spectrum analysis; finally, the central processing unit will The calculated result is converted into a control signal and output to the indicating unit and the LCD display, and the indicating unit is controlled to indicate the pitch, pitch or pitch according to how high or low it is, and the LCD display is controlled to display status information.

The status information displayed on the LCD display may include pitch status information;

The relevant pitch state information includes twelve well-tempered names of all sharps and twelve well-tempered names of flats, namely: "C, #C, D, #D, B, F, #F, G, #G, A, #A, B" and "C, bD, D, bE, E, F, bG, G, bA, A, bB, B".

In the metronome mode, the central processing unit first displays the default beat parameter information through the LCD display. If the user needs to change the default parameter, the parameter is input through the key unit. After the central processing unit obtains the parameter information of the beat that needs to be demonstrated, proceed Parameter setting; then, output the beat prompt tone signal to the speaker, drive the speaker to play the beat prompt tone, and control the indicating unit to indicate the beat according to the set parameters, and display status information through the LCD display.

The beat prompt tone can be set as a beat prompt tone with sound strength inverted. The so-called beat tone with inverted sound intensity means that when demonstrating a strong beat, the frequency of the corresponding beat tone is low, such as the sound of a strong beat "咚"; when demonstrating a weak beat and a non-strong beat, the corresponding beat tone The frequency is high, such as the upbeat and non-strong beat sound "da".

Among the existing beat beeps, the frequency of the corresponding downbeat beep is high, and the frequency of the corresponding non-downbeat beep is low "ding da da, ding da da", which is exactly the opposite of the situation in music practice: The drum kit is the strong beat of the bass kick drum, the weak beat of the snare drum, the strong beat of the national percussion music, the strong beat of the wooden fish, the weak beat of the bell, or the strong beat of the bass of the double sounding tube (the side with the larger diameter). The treble of the binoculars (knocking on the side with the smaller diameter) is used as an upbeat, such as "咚—哒,咚—哒...", "咚—哒—哒,咚—哒—哒... " are all examples of low downbeat frequencies and high non-downbeat frequencies; the same is true for instrumental rhythm or rhythm parts of a band: the rhythmic performance of the guitar is to play downbeats on strings 4, 5, and 6 (bass strings), 1 , 2, 3 strings (high-pitched strings) perform the upbeat; in the band, the bass or cello plays the downbeat, and other instruments play the offbeat and so on. This kind of beat prompt sound contrary to music practice has brought a lot of inconvenience to users. The present invention can overcome this problem through the beat prompt sound with sound strength inverted, so that the effect of the metronome is closer to music practice, which is beneficial to music learning. The reader's feelings about the artistic conception of music and improve their sense of music.

Through the above circuit structure, the control unit completes the control functions of the metronome and the tuner with the central processing unit as the center; realizes the input of key control signals and sound information, the indication control of the indication unit and the output of display information on the LCD display and beat audio signal output controls.

As shown in FIG. 2, the central processing unit 100 is a single-chip microcomputer (MCU) and its auxiliary circuits; the selected single-chip microcomputer model is S3P72N4. The output ports P3 (P3.1-P3.3) and P8 (P8.2-P8.7) of the single-chip microcomputer are connected to the indicating unit circuit 101, and the button circuit 103 is connected to the P6 port of the single-chip microcomputer, and the sound receiving processing circuit unit 104 and the audio frequency The output circuit unit 105 is connected to a corresponding port of the microcontroller. The LCD display circuit 102 includes an LCD display chip, the model of which is LCD display chip C8555. The SEG output port and the COM output port of the single-chip microcomputer are connected with the SEG and COM ports of the LCD display chip; the LCD display chip receives the output of the central processing unit, and the output of the LCD display chip is connected to the LCD display.

In order to better match with the music practice and to facilitate use, the present invention adopts a vertically arranged indicating unit, that is, the arrangement of all indicating points is a vertical arrangement, and all indicating points are arranged vertically as a whole. Each light-emitting diode or light bulb is independently installed on the casing 1 and arranged in a vertical line, or all the light-emitting diodes or light bulbs are formed into a vertically arranged whole, and then installed on the casing 1 to form a longitudinal indicating unit;

Indicating circuit (vertical indicating circuit) 101 comprises two groups of triodes, any combination of each group of these two groups of triodes can control the light-emitting diodes or light bulbs of the vertical indicating unit on a casing, and the output of the central processing unit is controlled by The conduction of the two groups of triodes controls the light emission of the light emitting diodes or small bulbs of the vertical indicator unit.

Each key including the key circuit 103 corresponds to an electric key, and when the key is pressed, the electric key connects the corresponding circuit to the single-chip microcomputer; the sound receiving and processing circuit 104 filters the input sound signal through RC, and passes through the two-stage integrated operational amplifier LM385 output to the P1.0 port of the single-chip microcomputer after being amplified; the audio output circuit 105 is a power amplifier circuit, which is connected with the P2.3 port of the single-chip microcomputer, and after the audio signal is amplified by power, the speaker is driven to sound; the audio output circuit and the sound receiving process Circuits come with standard output/input jacks. Sound receiving processing circuit and audio frequency output circuit of the present invention also can only have jack certainly and do not have loudspeaker and microphone, and such design is more conducive to the miniaturization of the present invention (but inconvenient to use), and directly has loudspeaker and microphone It is a commonly used replacement in circuits.

During the beat demonstration, the electronic metronome can enter the beat demonstration state through the key unit, and the single-chip microcomputer controls the LCD display to display prompt information through the LCD display circuit, and then receives the beat information to be demonstrated from the key circuit through the key unit, and the single-chip microcomputer will correspondingly The beat prompt sound is sent to the speaker for playback; at the same time, the vertical indication unit is controlled to display the beat vertically, and the LCD display is controlled to display status information.

When performing sound calibration, the electronic metronome can enter the sound calibration state through the key unit, and the single-chip microcomputer controls the LCD display to display prompt information through the LCD display circuit, and then receives the sound calibration project information from the key circuit through the key unit, and then receives the required information from the microphone. The sound of tuning; the control unit judges the pitch of the sound, and controls the vertical indicating unit to vertically indicate the pitch, pitch or pitch; at the same time, controls the LCD display to display status information.

Through the above device, the functions of metronome and tuner are realized, and the longitudinally arranged electronic light-emitting points are used to indicate the beat or display the pitch, pitch or pitch, which is more in line with the law of music practice.

During the beat demonstration process, when the vertical indicator unit indicates the first half beat, it cooperates with the prompt sound from the speaker, that is, the rhythm indicated by the vertical indicator unit coincides with the beat prompt sound from the speaker in time; the control unit controls the vertical indicator unit from top to bottom Sequentially make all or part of the indicator points glow, and at least one indicator point emits light at each moment. At the end of the first half of the beat, make the lowermost indicator point among all the indicator points glow; if the light-emitting points are regarded as movable (visual effect ), in the first half of a beat, the light-emitting point starts from a certain point among all the pointing points and moves to the bottom of all pointing points.

Of course, more than one indicator point can be used to emit light at the same time to demonstrate the beat, such as from top to bottom (same as the first half beat of the music beat) to make all or part of the indicator points glow, and the indicator points after lighting will not go out. All light from the starting point to the bottom point will be turned off at the same time. This demonstration method only requires that the indicator point be turned off at the end of the first half of the beat, which is a simple replacement of the above control method; the delayed extinguishing method can also be used to make the movement (visual effect) of the luminous point look like dragging a tail to demonstrate the beat .

When the longitudinal indicating unit indicates the second half of the beat, it is similar to indicating the first half of the beat. The control unit controls the indicating point to start from the bottom electronic light-emitting point, and makes all or part of the indicating points glow from bottom to top. When the second half of the beat ends, the corresponding The last indicator point of the camera emits light; that is, in the second half of the beat, the light-emitting point starts from the lowermost indicator point among all the indicator points, moves to a certain indicator point, ends the second half of the beat, and starts to demonstrate the next beat.

When demonstrating the strong beat, the range of the luminous indicating points is equal to all the electronic luminous points; when demonstrating the weak beat, the range of the luminous indicating points is less than or equal to 1/2 of all the electronic luminous points. As far as the beat is concerned, one up and one down are one beat, and the range mentioned here refers to the sequence of continuous light-emitting indicator points including those indicator points when demonstrating a complete beat; if the light-emitting points are regarded as movable, so The range mentioned above is the range of the electron luminescence point that the luminescence point passes through in one beat.

Demonstrating beats through the above vertical way is consistent with the way of showing beats in music activities, and is more in line with the practice rules of music. It makes users feel like there is a music teacher beating and showing beats by their side when practicing. Instructions to understand the tempo information greatly facilitate the user.

In the longitudinally arranged indication points of the longitudinal indication unit, a central indication point 8 is included, as shown in Figure 1, there are a certain number of indication points above and below the central indication point, and the number of indication points is generally the top and bottom. The quantity below is the same, and the quantity is determined by the designer. The more the quantity, the better the visual effect of demonstration and sound calibration, but the larger the space occupied, the higher the cost.

During the tuning process, if the sound is accurate, the central indicator point 8 will be illuminated, and the rest of the indicator points will not be illuminated; if the sound is higher/lower by a few units, the number above/below the central indicator point 8 and counted from the central indicator point 8 will deviate from the sound. The indicator points with the same number of high/low units are illuminated; that is, if the sound is one unit higher, the first indicator point above the central indicator point 8 adjacent to the central indicator point 8 is illuminated, and the remaining indicator points are not illuminated; Two units higher, the second electronic indicator point 8 above the central indicator point 8 is illuminated, the rest of the electronic light-emitting points are not lit, and so on; if the sound is one unit lower, the center indicator point 8 below the central indicator point 8 adjacent The first electronic indicator point is luminous, and the remaining electronic indicator points are not bright; if the sound is two units lower, the second electronic indicator point below the central indicator point 8 is luminous, and the remaining electronic luminescent points are not bright, and so on. The unit of higher/lower sound can be one cent or several cents higher/lower, or one hertz or several hertz higher/lower, depending on the number of indication points and the accuracy of tuning Degree requirements are determined.

The above indication method allows the user to know the pitch of the strings of his instrument intuitively, and also knows the difference from the standard pitch, and this vertical way demonstrates the beat, which is in line with the music practice. The actual rule that the strong beat has a large range and the weak beat has a small range, the image is intuitive, making it easier for people to understand the connotation of the music beat.

The number and types of buttons in the button unit 4 of the present invention vary according to the requirements and settings of the control software, generally at least five buttons are included: in the metronome state: 1. beat start/stop and power switch function keys , ②Function keys for beat type setting and conversion into the tuner mode, ③, ④beat speed setting plus/minus keys, ⑤Function key for setting the time value of the beating sound and the option of the beating sound part; in the state of the tuner, respectively These are: ①Up/Down number display mode selection function key and power switch function key, ②Tune mode option key and switch to metronome mode function key, ③, ④Manual tuning +/- selection or demo sound +/- selection Buttons, such as selecting the tuning of the 1st or 2nd string of the guitar or selecting the 2nd or 3rd string of the guitar when setting the demonstration tone, etc., at the same time ③, ④ are also 440Hz standard setting +/- buttons, ⑤ standard tone demonstration setting buttons, so Said that a button has other functions concurrently means that a button has two functions, and the two functions are controlled by a single-chip microcomputer program, and the button is pressed and lifted (restored) in a short period of time is designed as a function, and the button is designed as a function. Pressing the button for a long time (as pressing and holding the button for two seconds) is designed as another function.

The above examples are only to illustrate the keys of the present invention, and do not limit the type and quantity of the keys and the corresponding functions in the key unit of the present invention. Different key designs can be used to complete the same function. It can also be considered to determine the increase or decrease of the number of button units or the mutual replacement of the functions of each button according to the design of the product function and the beautiful appearance of the product structure.

Example 2:

Embodiment 2 of the present invention provides an electronic beat tuner that uses liquid crystal display segments arranged vertically in a specific area of an LCD display as a vertical indicating unit. The principle, function and circuit of each part of the electronic beat tuner of embodiment 2 are similar to the electronic beat tuner of embodiment 1, and the longitudinal indicating unit of embodiment 2 is made up of the liquid crystal display segments arranged vertically in the specific area of the LCD display , and the control unit makes corresponding adjustments; as shown in Figure 5, it includes: a casing 1, an LCD display 3, a key unit 4, a microphone, a speaker and a control unit;

The LCD display 3 and the key unit 4 are also installed on the panel of the casing 1; the specific area on the display screen of the LCD display 3 is provided with a vertical indication unit 2 composed of liquid crystal display segments 9 arranged vertically on the display screen, Each liquid crystal display segment 9 has two states of display and non-display, which are used to represent an indication state and a non-indication state.

The microphone and the loudspeaker are installed in the casing, and a microphone pickup hole 6 and a speaker sound hole 7 are arranged on the casing panel;

The control unit of Embodiment 2 of the present invention does not include an indicating circuit. The functions of the button circuit, the sound receiving processing circuit and the audio output circuit are exactly the same as the corresponding parts of Embodiment 1 of the present invention, and the functions of the central processing unit and the LCD display circuit are also very close, as shown in Figure 6, including: the central processing unit 100 , LCD display circuit 110 , button circuit 140 , sound receiving and processing circuit 130 , audio output circuit 120 and power supply circuit 150 .

In order to reduce the cost, make the operation more convenient, and more importantly, realize the appearance structure design of the product and the miniaturization design of the entire product volume, the signal output of the sound receiving and processing circuit can be output-headphone jack and the signal input of the audio output circuit-pickup The jacks are combined into one, and a common jack is used to realize the functions of the two jacks.

As shown in Figure 6, it is a schematic circuit diagram of an embodiment of a two-in-one jack in the present invention. The common jack is a two-channel earphone jack, and the common end of the two-channel jack is connected to the ground wire, and one circuit channel is connected to the ground wire. A microphone, and another circuit channel connects to a speaker. In the state of the tuner, the two-channel headphone socket is used as a pickup socket. When the pickup is inserted, the circuit channel connected to the microphone will be automatically disconnected so that the pickup receives external signals and the microphone does not work. At this time, due to the audio output circuit (power Amplifying circuit) is in a non-working state, so there is no impact on the sound signal output function; in the metronome state, the two-channel headphone socket is also used as a headphone jack. When the headphone is inserted, the circuit channel connected to the speaker will be automatically disconnected. The loudspeaker does not produce sound but the earphone produces sound signals. At this time, since the sound receiving and processing circuit is not working, there is no influence on the function of receiving external signals of the tuner.

The input of the described key circuit 140 is connected with the key unit 4, and the output of the key circuit 140 is connected to the central processing unit 100, which is used to transmit the information that the key is pressed to the central processing unit; the input of the described sound receiving processing circuit 130 is connected with The microphone is connected, and the received sound signal is filtered and amplified and output to the input end of the central processing unit 100; the audio output circuit 120 receives the output audio signal of the central processing unit 100, amplified and output to the speaker output;

The LCD display circuit receives the prompt information and status information of the central processing unit, and outputs these information to the LCD display; receives the control information of the central processing unit, controls the display of the display segment in the liquid crystal vertical indication unit 8, and completes the corresponding control indication function;

The workflow of the central processing unit is basically the same as that of the central processing unit in Embodiment 1, except that the central processing unit does not directly control the light emitting diode or the small light bulb by controlling the triode in the longitudinal indicating circuit; Instead, the control command is transmitted to the LCD display circuit, and the LCD display circuit controls the liquid crystal display segment of the vertical indication unit to complete the vertical indication function.

In the circuit shown in FIG. 6 , the central processing unit 100 is a single-chip microcomputer (MCU) and its auxiliary circuits; the selected single-chip microcomputer model is S3P72N4. The COM and SEG output ports of the single-chip microcomputer are connected to the input port of the LCD display circuit 110, and communicate with the LCD display circuit; the output of the key circuit 140 is connected to the P6 port of the single-chip microcomputer, and the output of the sound receiving processing circuit unit 130 is connected to the P1.0 input of the single-chip microcomputer port, the audio output circuit unit 120 is connected to the corresponding port of the single-chip microcomputer.

The LCD display circuit 110 includes an LCD display chip CS555, the SEG output port and the COM output port of the central processing unit are connected with the SEG and COM ports of the LCD display chip, and the LCD display chip not only receives prompt information from the single-chip microcomputer and outputs it to a designated area of the LCD display, And receive the control information of the single-chip microcomputer, and complete the display control of the display segment in the liquid crystal vertical indicator unit 2 .

The control unit directly controls the liquid crystal vertical indicating unit 2 to indicate the beat or receives an input sound signal from the microphone, judges the pitch of the sound, and controls the liquid crystal vertical indicating unit 2 to indicate the pitch, pitch or pitch; the control unit receives the control signal from the key unit 4, Complete the control function; the control unit outputs prompt sound or beat sound signal from the speaker to complete the sound output function; the control unit controls the LCD display 3 to display information.

When performing a beat demonstration, the electronic metronome can enter the beat demonstration state through the key unit, and the control unit controls the LCD display 3 to display prompt information, and then receives the beat information to be demonstrated from the key unit 4, and the control unit prompts the corresponding beat The sound is sent to the loudspeaker for playback; meanwhile, the liquid crystal vertical indicator unit 8 of the LCD display is controlled to display the beat vertically, and the LCD display 3 is controlled to display status information.

When performing sound calibration, the electronic metronome can enter the sound calibration state through the key unit, and the control unit controls the LCD display to display prompt information, then receives the sound calibration project information from the key unit, and then receives the sound that needs to be tuned from the microphone; control The unit judges the pitch of the sound, and controls the liquid crystal vertical indication unit 2 of the LCD display to indicate the pitch, pitch or pitch vertically; at the same time, controls the LCD display to display status information.

The longitudinally arranged liquid crystal display segments 9 of the liquid crystal vertical indicator unit 2 of the LCD display 3 include a central display segment 10 , and a certain number of liquid crystal display segments are located above and below the central display segment 10 .

The control unit of the electronic beat tuner described in Embodiment 2 of the present invention controls the liquid crystal display segment 9 of the longitudinal indication unit 2 of the LCD display to indicate the rhythm vertically and indicate the pitch, pitch and pitch in the same manner as the control unit in Embodiment 1. The vertical pointing unit pointing points point out beats in exactly the same way they point out pitch, pitch, and intonation.

Aiming at the different hobbies and habits of different users, the present invention designs a variety of beat prompt sounds to meet different needs, and the user can choose any one of them or a combination thereof according to needs.

When the present invention is performing rhythm demonstration, the rhythm prompting sound output from the loudspeaker includes two types of sounds: one is the sound of simulated rattles, which can be the sound of large and small wooden fish, the sound of high and low double ringing drums, the sound of touching bells, and the sound of castanets; the other is human voice Counting sounds can be Chinese female voices, Chinese male voices, Mandarin Chinese female voices, Chinese Cantonese female voices, English rising female voices, English falling female voices, English rising male voices, English falling male voice counting beats, etc.

The beat prompt sound also includes a multi-part beat prompt sound formed by a mixed sound formed by combining different prompt sounds. The multi-part beat prompting sound may be composed of different simulated rattles, different human voice counting sounds, and a mixed sound combining the simulated rattles and the human voice counting beats.

The following takes two voices as an example to explain in detail how multi-voice beat prompts are combined to form.

For example, the simulated clatter sounds include "dong" and "da", and the human voice count sounds include "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX" and " AND". Of course, it can also be a phonetic sound with the same meaning in Chinese or other countries,

The mixed sound of the simulated ringer sound and the vocal counting sound refers to the sound simultaneously issued by a single analog ringing sound and a single vocal counting sound, including "咚+ONE", "哒+TWO", "哒+THREE", "da+FOUR", "da+FIVE", "da+SIX" and "da+AND",

The two-part beat prompt sound refers to two different kinds of sounds, the human voice counting beat sound and the simulated loudspeaker sound, respectively indicating the different rhythm patterns of the two parts, including one-to-two, two-to-three, two-to-four, etc. wait,

For example in 2/4 time,

The one-to-two means that the first part is a quarter note, which is the sound of human voice, and each beat sounds one sound, and the second part is an eighth note, which is a percussion sound, and each beat sounds two sounds, two The reverberation effect of the sound part is "咚+ONE"——"哒", "哒+TWO"—"哒"..., that is, the sound part is "ONE, TWO, ONE, TWO,... The counting sound of "...", the second part is the percussion sound of "dongda, dada, dongda, dada,..."

As shown in Figure 3 Multi-part Demonstration 2: 3-beat sound principle schematic diagram, the first part is an eighth note, which is the number of beats of the human voice, and each beat sounds two tones, and the second part is a triplet, which is a percussion sound , three sounds for each beat (◎ is a two-in-one mixed sound of percussion and beat sound, ○ is a single vocal beat sound or a single percussion sound), and the reverberation effect of two parts For "咚+ONE"—"哒"——"AND"——"哒", "哒+TWO"——"哒"——"AND"——"哒"..., that is The first part is the counting sound of "ONE—AND, TWO—AND, ONE—AND, TWO—AND,...", and the second part is "咚——哒——哒,哒——Da——Da, Dong——Da——Da, Da——Da——Da,..." The sound of the rattle.

As shown in Figure 4, the schematic diagram of the sound principle of the multi-part demonstration 2:4 beat, the first part is an eighth note, which is a few beats of the human voice, and each beat sounds two tones, and the second part is a sixteenth note, which is percussion Audio, four tones per beat, the reverberation effect of the two parts is "咚+ONE" - "Da" - "Da+AND" - "Da", "Da+TWO" - "Da" ——"哒+AND"——"哒"..., that is, the first part is "ONE—AND, TWO—AND, ONE—AND, TWO—AND,... The counting sound of ", the second part is "咚——哒—————, "———————, 咚————————,———" Da——da,..." the sound of a loudspeaker.

The first part and the second part are interchangeable.

In order to realize the above functions in the circuit design, generally adopt two kinds of methods, one is to solidify the tempo prompt tone into the ROM of the central processing unit such as the single-chip microcomputer, need not add new chip and circuit like this, benefit and save the hardware cost; But because The ROM capacity of the single-chip microcomputer is limited, and it is impossible to provide more function options, which makes the beat tone become monotonous and has a single function. Regions and groups of people provide personalized services.

120 part among Fig. 6 is the circuit diagram of the embodiment that the audio output circuit of the present invention comprises voice chip, and what described voice chip selects is voice chip WK2134, and its 1,8 pins are power supply, ground wire respectively, and 9 pins connect a resistor to The power supply, together with the internal oscillator circuit, generates the clock signal required by the chip.

The various analog sound and human voice beat sound that the present invention sets are pre-recorded, edited and converted into a certain format such as the ADPCM data format, and stored in the chip memory.

P1.0, P1.1, P1.2, and P1.3 of the voice core are data communication ports, which are connected to the I/O of the single-chip microcomputer, receive the control command sent by the CPU, and send a message to the single-chip microcomputer after receiving the control command. Send an answer signal. The control command of the single-chip microcomputer actually requires the voice chip to emit a certain sound immediately. The voice chip outputs the data of the sound after receiving this command, and outputs the sound signal at pin 2 after the internal decoding circuit, and then passes through the external Filter circuit, amplifier circuit; the chip 7368 in Figure 6 is a voice amplifier chip, the sound signal is amplified by it to drive the speaker, and the speaker can output the sound to be emitted.

Example 3:

The control method of the electronic beat tuner of the present invention comprises the following steps:

Step 1. Power on, system initialization;

Step 2. Scan to determine whether there is a button command to switch to the metronome mode. If it is converted to the metronome mode, perform step 4; otherwise, directly enter the tuner mode and perform step 3;

Step 3. Obtain the tuning parameter information, analyze the input sound, convert the analysis result into a control signal, control the indicating unit to indicate pitch, pitch or pitch, and control the LCD display to display status information. Under the prompt of the display, it is required to change the indicating unit to select the # or b display mode, then change the # or b display mode;

Step 4: Obtain the tempo information of the demonstration, set the parameters, output the required tempo audio signal to drive the speaker to play the tempo prompt, and control the indicating unit to indicate the tempo, and control the LCD display to display the status information;

Step 5. If the shutdown command is detected, turn off the beat tuner and enter the sleep standby state.

The mode selection button can be used to adjust the present invention to be in different states of the metronome or the tuner, and directly enter the state of the tuner after starting up, which can simplify the operation steps; if the metronome mode is selected, no additional steps will be added.

Step three of the present invention, control the present invention to complete the function of tuning, and some functions related to tuning, specifically include the following steps:

Step 30, displaying default information through the LCD display;

Step 31. Scan the keys. If there is a power-off command, perform step 5; if it is a command to switch to the metronome mode, perform step 4; if you change the A4 standard tone standard by pressing the button under the prompt of the LCD display, then change the A4 standard Tone standard, execute step 32; if perform A4 demonstration pronunciation, execute step 34; if there is no key instruction, execute step 32;

Step 32. Carry out frequency measurement and spectrum analysis on the input musical instrument sound, compare it with the frequency of the set standard tone, and calculate the difference between the group sequence, sound name and sound cent;

Step 33, convert the calculated result into a control signal, control the indicating unit to indicate pitch, pitch or pitch, control the LCD display to display status information, and re-execute step 31;

Step 34, whether to change the parameters of the A4 demonstration sound, if it is changed, change the parameters of the A4 demonstration sound by pressing the button under the prompt of the LCD display, and then perform step 35; otherwise, directly perform step 35;

Step 35, carry out the demonstration pronunciation of A4; if there is an instruction to stop the demonstration pronunciation of A4, then stop the demonstration pronunciation of A4, and execute step 31; if there is no instruction to stop the demonstration pronunciation of A4, then execute step 34.

In the tuner mode, the working mode of the present invention can also be changed through the mode selection button. The LCD display cooperates with the key unit to communicate with the user and complete the selection of different functions and the setting of different parameters. The modification of the tuning parameters described in step 31 mainly refers to changing the A4 standard (such as 440Hz or 441Hz, etc.) and specifying the tuning of different items (such as guitar, violin, etc.).

The present invention measures the frequency of the input musical instrument sound, and compares it with the frequency of the standard sound set by parameters after spectrum analysis, and calculates the difference between the input musical instrument sound and the standard sound in calculating the group sequence, sound name and cent, The information is displayed on the LCD display, and at the same time, according to the preset unit, it is calculated which indication point should enter the indication state to indicate the level of the input sound, and the corresponding control signal is output to complete the indication.

Generally speaking, the frequency range corresponding to the indicator point is not linear, but the frequency range corresponding to the middle is narrower (the middle ones can be linear, which is convenient for adjustment), in order to achieve higher tuning accuracy; while the two sides are The corresponding frequency range is wider, and the tuning frequency range is increased, and the uppermost/lowermost indication points can include all frequency ranges higher/lower than the set frequency value.

A4 demonstration pronunciation is a common function of the tuner. After selecting this function, set the pronunciation parameters (mainly the frequency), and the single-chip output drives the speaker to emit the A4 demonstration tone of this frequency. The pronunciation frequency can be set at 435 -445Hz or greater range.

In step 31, the present invention implements function conversion through the key unit, and the key unit described in Embodiment 1 of the present invention is taken as an example for illustration:

① The key is the function key for ascending/descending number display mode selection and also the function key of the power switch. The one key with other functions means that one key has two functions. Through the continuous scanning of the single-chip microcomputer, the continuous detection of a key signal is continuously detected. The time is designed as one function within a specific time (the user presses the key shortly), and the duration of continuously detecting a key signal is designed as another function for more than a specific time (the user presses the key for a long time). For this button, in order to facilitate the user, the functions that are not commonly used, such as the mode conversion function and the power switch function, are generally set as the functions corresponding to the long press button.

After the single-chip microcomputer scans the key unit to have a signal, analyze and determine the address of the key and the duration of the key, and start the corresponding control function according to the current mode state. In the tuner mode, ① press the key shortly, and the single-chip microcomputer controls the LCD display through the LCD display circuit. The ascending or descending sign display mode, according to the ascending/falling sign display mode selected by the user through the button ①; in the tuner mode, press and hold the ① button, if the beat tuner is off at this time, the microcontroller will turn on the power, power on Self-inspection; if the beat tuner is in the working state at this time, the single-chip microcomputer will turn off the power and directly enter the off state or standby state; if the single-chip microcomputer does not scan any key signals or detect any input signals within a certain period of time (such as 5 minutes) , it enters the hibernation shutdown state.

The MCU’s support for other button function conversion is similar to the ① button. If it is a parameter setting function, the MCU controls the LCD display to display the optional parameters. After the user selects the parameters through the buttons, the MCU controls the beat tuner to complete the corresponding parameters. Setting; if it is a non-parameter setting function such as changing the mode of the beat tuner, the single-chip microcomputer detects that the key unit is in this state, and directly makes adjustments to complete the corresponding function.

②The key is the tuning mode option key and the function key for switching into the metronome mode. The tuning modes include: guitar, bass, violin, guzheng, dulcimer, erhu and twelve equal-tempered tuning modes, etc. ③, ④ button for manual tuning selection +/- key (+ means one by one up selection, - means one by one down selection) or the up and down travel setting of the demonstration sound, such as selecting a certain string (1-6 strings) in the guitar tuning mode any one of the 440Hz standard settings), or set the standard tone of any string in the 1-6 strings of the guitar when the demo tone is played. Uplink setting: 435, 436, 437...445, long press the ④ button for downlink setting: 445, 444, 443, 442...435; ⑤ button is the standard audio demonstration setting button, press This button enters the state of A4 demonstration pronunciation. When the MCU scans the signal of button ⑤ in the state of no demonstration sound, it will set the pronunciation and output the demonstration sound.

The above example is only a description of the operation function of the button of the present invention in the state of the tuner, and does not limit the type and quantity of the button and the corresponding functions in the button unit of the present invention. Different button designs can be used to complete the same function.

Described step 4, control the present invention to complete beat demonstration and related functions, including the following steps:

Step 40, displaying default information through the LCD display;

Step 41, carry out button scanning, if the shutdown command is scanned, execute step 5; if the scan finds the tuner mode conversion command, execute step 4; if the beat parameter is changed by pressing the button under the prompt of the LCD display, the so-called beat parameter includes Beat type, speed, time value of one part, time value of two parts, and type of percussion beat, then change the beat parameter and go to step 42; if the timer overflows, reset the timer; if no key is detected by scanning Instruction, execute step 42;

Step 42. Perform parameter setting, calculate the frequency division of the control indicator unit and the beat sound; if the start/stop demonstration command is scanned, output/stop the required beat audio signal to drive the speaker to play the beat prompt sound, and at the same time control/terminate the indicator unit to indicate Beat, control/interrupt the dynamic display status information of the LCD display. The so-called dynamic display status information refers to the part of the display segment of the LCD display that changes synchronously with the beat demonstration during the beat demonstration process, including the up and down dynamic demonstration of the vertical indicator unit and the subsection The cumulative display of the numbers one by one;

Step 43, execute step 41.

In the state of the metronome, the user communicates with the LCD display and the key unit to obtain the beat information for the demonstration, and the single-chip microcomputer converts the beat information to be demonstrated into the clock frequency information of the single-chip microcomputer, and then it can be read from the single-chip ROM or voice The IC extracts the beat prompt tone, outputs the audio signal according to the required rhythm, and calculates the range and time for the point to enter the indication state according to the strong beat, weak beat and frequency information, and converts the calculation result into a control signal to control the indicating unit to indicate the beat, and through The LCD display shows status information.

Take the button unit described in Embodiment 1 of the present invention as an example for illustration:

In the metronome state, the buttons are: ① beat start/stop and power switch function key, the single-chip microcomputer detects the ① button signal through scanning and only lasts within a specific time (such as 1 second), and starts when the beat demonstration is stopped. Beat demonstration, and stop the beat demonstration when the beat demonstration is in progress; if the single-chip scan detects that the ① button signal continues for more than a specific time, turn off the power and enter the sleep state. ②Function key for beat type setting and conversion into tuner mode, the beat types include: 1/4 beat, 2/4 beat, 3/4 beat, 4/4 beat, 3/8 beat and 3/8 beat Wait, when the single-chip scanning detects the ② button signal and lasts only within a specific time (such as 1 second), then set and display the beat pattern one by one until the customer confirms; Change the current metronome to tuner mode. ③, ④ Beat speed setting +/- key, the speed range is 200 levels: 30-230 beats/minute, for the convenience of users, short press is designed to set the acceleration/deceleration one by one, and long press is for continuous and rapid acceleration/deceleration Deceleration setting, the MCU detects that the conduction time of these two buttons is less than the rated time (such as 1 second) during the button scanning process, that is, it is judged as a short press (pressed and then lifted in a short time), set And it is displayed as the step-by-step addition/subtraction of the beat speed. When the single-chip scan detects the ③ or ④ button signal and only lasts within a specific time, it will be set one by one and display the speed change until the customer confirms (no more buttons); the single-chip scan If the ③ or ④ button signal is detected to last for more than a specific time, then the speed will be continuously and rapidly set and displayed until the customer confirms that the button is stopped. ⑤Function keys for setting the time value of the beat sound, including quarter notes, eighth notes, triplets, sixteenth notes, etc. Set the second part (voice count) to quarter note, eighth note or rest. If the user selects the first part, that is, short press the ⑤ key, and the MCU scans the ⑤ key to be in the short-press state, that is, the cycle takes turns to set and display each time value of the first part until the customer confirms that the key is no longer pressed. If the user selects the second part, that is Press and hold the ⑤ key for a long time (press and hold), the MCU scans the ⑤ key and it is in the long-press state, that is, slowly (such as 1 second, 1 change) circularly sets and displays the quarter note, eighth note or Rest until the client confirms that the key is no longer pressed. For example, to set the 2-3 beats of double voices: short press the ⑤ key to set the first part to triplet, and then press and hold the ⑤ key to set the second voice to eighth notes. At this time, the MCU detects the relevant signal and then sets and displays Relevant time value data, if you short press the ① button again, the MCU detects the ① button signal and only lasts within a specific time. If the current beat demonstration is stopped, the beat demonstration of 2-3 beats will start; another example, in the beat demonstration In the state, the beat demonstration of 2-3 beats is changed to the sixteenth note of the monophonic part: short press the ⑤ key to set the first part to the sixteenth note, and then long press the ⑤ key to set the second part as a rest (ie Two voices are not pronounced), at this time, the single-chip microcomputer detects the relevant signal and promptly sets and displays the sixteenth note of the first voice and the rest of the second voice, and the single-chip setting changes the triplet pronunciation of the ongoing one voice to ten The pronunciation of the sixth note changes the pronunciation of the eighth note of the ongoing second part to a rest, that is, no pronunciation.

After the MCU scans the key unit to have a signal, analyze and determine the address of the key and the duration of the key, and start the corresponding control function according to the current mode state. In the metronome mode, press the ① key shortly, and the MCU will stop the beat demonstration through the relevant circuit. Start the beat demonstration, and stop the beat demonstration when the beat demonstration is in progress; press and hold the ① button in the metronome mode, if the beat tuner is off at this time, the single-chip microcomputer will turn on the power, power-on self-test; if the beat tuner is at this time If the device is in the working state, the single-chip microcomputer turns off the power and directly enters the dormant standby state; if the single-chip microcomputer does not scan any key signals within a certain period of time (such as 5 minutes), it enters the dormant standby state.

The above examples are only to illustrate the keys of the present invention, and do not limit the type and quantity of the keys and the corresponding functions in the key unit of the present invention. Different key designs can be used to complete the same function.

All the parameters of the present invention include a default parameter, which is the most commonly used parameter among the optional parameters, so as to facilitate the use of the user. The electronic beat tuner of the present invention can include a RESET function, which can restore all parameters to default parameters.

Finally, it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be modified Or an equivalent replacement, any modification or partial replacement without departing from the spirit and scope of the present invention shall fall within the scope of the claims of the present invention.

Claims (10)

1, a kind of electronic beat sound-calibrator comprises: casing, LCD display, indicating member, push-button unit, microphone and loudspeaker;

Described indicating member is made up of at the indication point on casing surface linear array, and LCD display and push-button unit are installed on the machine shell panel;

Described microphone and loudspeaker are installed in the casing, and the relevant position on machine shell panel is provided with microphone pickup hole and loudspeaker sound hole;

It is characterized in that: also comprise control module, described control module comprises: central processing unit, LCD display circuit, indicating circuit, key circuit, sound receiving processing circuit and audio output circuit;

The input of described key circuit is connected with push-button unit, and the output of key circuit is connected to central processing unit, is used for transmitting the information that button is pressed to central processing unit;

The input of described sound receiving processing circuit links to each other with microphone, outputs to the input end of central processing unit after the voice signal filtering that receives is amplified;

Described indicating circuit receives the control signal of central processing unit, and the control indicating member is indicated beat or pitch, sound is low and accuracy in pitch;

Described LCD display circuit receives the output information of central processing unit, outputs on the LCD display;

Described audio output circuit receives the sound signal of the output of central processing unit, outputs to loudspeaker output after the amplification;

Described central processing unit is responsible for the analyzing and processing of signal, output control signal and sound signal;

Can enter the CALIBRATION pattern by push-button unit; Under this pattern, central processing unit is measured the height of sound import, the control indicating member by with standard pronunciation higher/on the low side how much indicate pitch, sound is low or accuracy in pitch, control LCD display display status information;

The status information that described LCD display shows comprises the pitch status information;

Described relevant pitch status information comprises the twelve-tone equal temperament musical alphabet of all sharps and flat, that is: " C, #C, bD, D, #D, bE, E, F, #F, bG, G, #G, bA, A, #A, bB, B ";

Can enter the metronome pattern by push-button unit, under this pattern, the central processing unit output audio signal drives loudspeaker output beat prompt tone to audio output circuit, controls indicating member indication beat simultaneously, and by the LCD display display status information;

Described beat prompt tone is the inverted beat prompt tone of sound intensity, and the inverted beat prompt tone of so-called sound intensity is meant that the frequency of corresponding beat prompt tone is low when demonstration during strong beat, and when demonstrating non-strong beat, the frequency height of corresponding beat prompt tone;

The beat demonstration of demonstration of beat that described beat prompt tone is an alliteration portion or multi part, the beat demonstration of so-called alliteration portion comprises the beat demonstration that 2-3 claps, 2-4 claps.

2, electronic beat sound-calibrator according to claim 1 is characterized in that: the indication point of described indicating member is light emitting diode or the miniature bulb that is installed on the machine shell panel;

Described indicating circuit comprises two groups of triodes, every group on these two groups of triodes are got light emitting diode or the miniature bulb that indicating member on the casing is all controlled in any one combination of one, and central processing unit is controlled light emitting diode or miniature bulb switch by the conducting of controlling these two groups of triodes;

Described central processing unit comprises single-chip microcomputer and accessory circuit thereof, the key circuit connecting circuit links to each other with the control port of single-chip microcomputer, the output of sound receiving processing circuit is connected with input of single chip, the control output end mouth of single-chip microcomputer is connected to indicating circuit, control the luminous of light emitting diode or miniature bulb, the audio output port of single-chip microcomputer is connected to audio output circuit;

Described LCD display unit comprises the LCD display chip, and the SEG output port of single-chip microcomputer links to each other with COM port with the SEG of LCD display chip respectively with the COM output port, to LCD display chip transmitting control commands and the information that needs to show; The output of LCD display chip is connected to LCD display.

3, a kind of electronic beat sound-calibrator comprises: casing, LCD display, push-button unit, microphone and loudspeaker;

Described LCD display comprises the indicating member that is formed as indication point by the liquid crystal display section in the particular display area of LCD display of arranging, and LCD display and push-button unit are installed on the machine shell panel;

Described microphone and loudspeaker are installed in the casing, and the relevant position on machine shell panel is provided with microphone pickup hole and loudspeaker sound hole;

It is characterized in that: also comprise control module, described control module comprises: central processing unit, LCD display circuit, key circuit, sound receiving processing circuit and audio output circuit;

The input of described key circuit is connected with push-button unit, and the output of key circuit is connected to central processing unit, is used for transmitting the information that button is pressed to central processing unit;

The input of described sound receiving processing circuit links to each other with microphone, outputs to the input end of central processing unit after the voice signal filtering that receives is amplified;

Described audio output circuit receives the sound signal of the output of central processing unit, outputs to loudspeaker output after the amplification;

Described LCD display circuit receives the output information of central processing unit, outputs on the LCD display, receives the control signal of central processing unit output, and the indication point of the indicating member on the control LCD display is indicated beat or pitch, sound is low and accuracy in pitch;

Described central processing unit is responsible for the analyzing and processing of signal, output control signal and sound signal;

Can enter the CALIBRATION pattern by push-button unit, under this pattern, central processing unit is measured the height of sound import, the indicating member of control LCD display by with standard pronunciation higher/on the low side how much indicate pitch, sound is low or accuracy in pitch; Control LCD display display status information;

The status information that described LCD display shows comprises the pitch status information;

Described relevant pitch status information comprises the twelve-tone equal temperament musical alphabet of all sharps and flat, that is: " C, #C, bD, D, #D, bE, E, F, #F, bG, G, #G, bA, A, #A, bB, B ";

Can enter the metronome pattern by push-button unit, under this pattern, the central processing unit output audio signal drives loudspeaker output beat prompt tone to audio output circuit, the indicating member of controlling LCD display simultaneously is by the indication beat, and by the LCD display display status information.

Described beat prompt tone is the inverted beat prompt tone of sound intensity, and the inverted beat prompt tone of so-called sound intensity is meant that the frequency of corresponding beat prompt tone is low when demonstration during strong beat, and when demonstrating non-strong beat, the frequency height of corresponding beat prompt tone;

The beat demonstration of demonstration of beat that described beat prompt tone is an alliteration portion or multi part, the beat demonstration of so-called alliteration portion comprises the beat demonstration that 2-3 claps, 2-4 claps.

4, electronic beat sound-calibrator according to claim 3, it is characterized in that: described central processing unit comprises single-chip microcomputer and accessory circuit thereof, the key circuit connecting circuit links to each other with the control port of single-chip microcomputer, and the output of sound receiving processing circuit is connected with input of single chip; The audio output port of single-chip microcomputer is connected to audio output circuit;

Described LCD display unit comprises the LCD display chip, and the SEG output port of single-chip microcomputer links to each other with COM port with the SEG of LCD display chip respectively with the COM output port, and the output of LCD display chip is connected on the LCD display; The LCD display chip receives the control command of single-chip microcomputer output, the liquid crystal display section of the indicating member on the control LCD display is indicated beat or pitch, sound is low and accuracy in pitch, the LCD display chip receives needing display message and controlling display command of single-chip microcomputer output, and information is outputed on the LCD display.

5, according to the arbitrary described electronic beat sound-calibrator of claim 1-4, it is characterized in that: described indicating member is vertical indicating member, and all the arrangement mode of indication point is vertically to arrange; Vertically indicating member is indicated beat in the following way:

When vertically partly clapping before the indicating member indication, cooperate with the beat prompt tone that loudspeaker sends, control module is controlled all or part of indication point and is entered indicating status in proper order from top to bottom, and each has at least an indication point to be in indicating status constantly; Before half clap when finishing, making in whole indication points, the indication point of below enters indicating status;

When vertically indicating member is indicated later half bat, cooperates with the beat prompt tone that loudspeaker sends, control module is controlled all or part of indication point from the indication point of below, enters indicating status from the bottom to top in proper order; When later half bat finishes, make corresponding last indication point enter indicating status;

When the demonstration strong beat, all scopes that enter the indication point of indicating status are whole indication points; When the demonstration weak beat, all scopes that enter the indication point of indicating status are equal to or less than 1/2nd of whole indication points;

Described vertical indicating member comprises an instructions of the Central Committee point, and the indication point of some is respectively arranged in the above and below of instructions of the Central Committee point; Vertically indicating member is indicated pitch in the following way, sound is low or accuracy in pitch:

In the tuner process, if sound import is accurate, vertically indicating member instructions of the Central Committee point enters indicating status, and remaining indication point keeps non-indicating status; If sound import is higher/some units on the low side, instructions of the Central Committee point top/below enters indicating status from/the indication point that units on the low side is identical higher with sound of central indication point number, and remaining indication point keeps non-indicating status.

6, according to the arbitrary described electronic beat sound-calibrator of claim 1-4, it is characterized in that: described sound receiving processing circuit and audio output circuit can adopt a public dual-channel headphone jack;

The common port of described dual-channel headphone jack connects ground wire, and a circuit path connects microphone, and another circuit path connects loudspeaker; Under the CALIBRATION state, when inserting acoustic pickup, connect the circuit path meeting automatic cutout of microphone; Under the metronome state, when inserting earphone, connect the circuit path meeting automatic cutout of loudspeaker, realize the function of two kinds of jacks.

7, according to the arbitrary described electronic beat sound-calibrator of claim 1-4, it is characterized in that: described beat prompt tone comprises that simulation Chinese percussion instrument sound, voice counts the multi part beat voice prompt of the compound voice of bat sound and different prompt tones;

Described multi part beat voice prompt is counted bat sound and simulation Chinese percussion instrument sound and voice by different simulation Chinese percussion instrument sound, different voice and is counted the compound voice that bat sound makes up and form;

Described audio output circuit comprises a speech chip, is used to store the beat voice prompt;

Described speech chip links to each other with single-chip microcomputer, receive the control command of single-chip microcomputer, the required beat prompt tone of requirement output by control command, wave circuit and amplifying circuit after filtration again, from the beat voice prompt of loudspeaker output appointment, the LCD display of central processing unit control simultaneously circuit demonstrates corresponding duration note symbol.

8, a kind of control method of electronic beat sound-calibrator is characterized in that: control in according to the arbitrary electronic beat sound-calibrator among the claim 1-7, comprise the steps:

Step 1, start, system initialization;

Step 2, scanning have judged whether that key command is converted to the metronome pattern, if be converted to the metronome pattern, execution in step four; Otherwise, directly enter the CALIBRATION pattern, execution in step three;

Step 3, acquisition tuner parameter information, sound to input is analyzed, convert the result who analyzes to control signal, the control indicating member is indicated pitch, sound is low or accuracy in pitch, control LCD display display status information, if scan button under the prompting of LCD display, require the change indicating member to select # or b display mode, then change # or b display mode;

Step 4, acquisition demonstration beat information are carried out the parameter setting, export required beat audio-signal-driven loudspeaker plays beat prompt tone, control indicating member indication beat simultaneously, control LCD display display status information;

If step 5 scans shutdown command, then close beat sound-calibrator and enter the dormancy holding state.

9, the control method of electronic beat sound-calibrator according to claim 8 is characterized in that: described step 3 specifically comprises:

Step 30, show default information by LCD display;

Step 31, carry out key scan, if shutdown command is arranged, execution in step five; If for being converted to the metronome mode instruction, execution in step four; If be by button under the prompting of LCD display, change A4 standard pronunciation standard is then changed A4 standard pronunciation standard, execution in step 32; If carry out A4 demonstration pronunciation, execution in step 34; If without any key command, execution in step 32;

Step 32, the musical instrument sound of input is carried out frequency measurement and spectrum analysis, compare the difference of calculating group preface, musical alphabet and cent with the frequency of the standard pronunciation of setting;

Step 33, convert result calculated to control signal, control indicating member indication pitch, sound is low or accuracy in pitch, and control LCD display display status information re-executes step 31;

Step 34, whether change the parameter of A4 demonstration sound,, under the prompting of LCD display, change the parameter of A4 demonstration sound, execution in step 35 by button if change; Otherwise direct execution in step 35;

Step 35, carry out A4 demonstration pronunciation; If the A4 of stopping demonstration pronunciation instruction is arranged, then stops A4 demonstration pronunciation, execution in step 31; If do not stop A4 demonstration pronunciation instruction, then execution in step 34.

10, the control method of electronic beat sound-calibrator according to claim 8 is characterized in that: described step 4 comprises the steps:

Step 40, show default information by LCD display;

Step 41, carry out key scan, if scan shutdown command, execution in step five; If scan conversion CALIBRATION mode instruction, execution in step four; If be by button under the prompting of LCD display, change beat parameter, so-called beat parameter comprises that beat type, speed, a part duration, two part durations, percussion music show bat sound kind, then change the beat parameter, execution in step 42; If timer overflows, the timer of then resetting; If scanning does not detect any key command, execution in step 42;

Step 42, carry out the parameter setting, calculation control indicating member and show the frequency division of bat sound; Start/stop the demonstration instruction if scan, export/stop required beat audio-signal-driven loudspeaker plays beat prompt tone, the beat of control/termination indicating member indication simultaneously, the dynamic display status information of control/interruption LCD display, so-called dynamically display status information is meant the part that the show pen Duan Zhongyu beat demonstration of LCD display in the beat presentation process changes synchronously, comprises the demonstration that adds up one by one of the dynamic demonstration up and down and the little joint number of vertical indicating member;

Step 43, execution in step 41.

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