WO2004049078A1 - Appareil electronique indiquant le tempo et corrigeant la tonalite et procede de commande - Google Patents

Appareil electronique indiquant le tempo et corrigeant la tonalite et procede de commande Download PDF

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Publication number
WO2004049078A1
WO2004049078A1 PCT/CN2003/000954 CN0300954W WO2004049078A1 WO 2004049078 A1 WO2004049078 A1 WO 2004049078A1 CN 0300954 W CN0300954 W CN 0300954W WO 2004049078 A1 WO2004049078 A1 WO 2004049078A1
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WIPO (PCT)
Prior art keywords
beat
sound
lcd display
unit
circuit
Prior art date
Application number
PCT/CN2003/000954
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English (en)
Chinese (zh)
Inventor
Ke Zeng
Pingwei Zeng
Original Assignee
Ke Zeng
Pingwei Zeng
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ke Zeng, Pingwei Zeng filed Critical Ke Zeng
Priority to CNB2003801032476A priority Critical patent/CN100538560C/zh
Priority to AU2003284803A priority patent/AU2003284803A1/en
Publication of WO2004049078A1 publication Critical patent/WO2004049078A1/fr

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
    • G04F5/02—Metronomes
    • G04F5/025—Electronic metronomes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10G—REPRESENTATION OF MUSIC; RECORDING MUSIC IN NOTATION FORM; ACCESSORIES FOR MUSIC OR MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR, e.g. SUPPORTS
    • G10G7/00—Other auxiliary devices or accessories, e.g. conductors' batons or separate holders for resin or strings
    • G10G7/02—Tuning forks or like devices

Definitions

  • the invention relates to an electronic sound device and a control method thereof, in particular to an electronic beat tuner having both functions of a metronome and a tuner, and controlling the electronic beat tuner to complete a beat demo and a tuner function.
  • Metronome and tuner are widely used in music teaching, instrument practice and other music practice. Learning music and musical instruments cannot be separated from training and mastering accurate beats. The metronome has always been an indispensable tool for learning music and musical instruments. In the study of musical instruments, the sound of musical instruments is also a very important issue. Accuracy will affect the judgment of the sound level and music sense, so before practicing, you must use the tuner to tune the instrument you are learning and playing.
  • a technical problem to be solved by the present invention is to provide an electronic metronome tuner, which has both functions of a metronome and a tuner; and, the upper surface of the casing is used to indicate the beat and pitch, pitch, and pitch.
  • the indication unit is composed of the indication points.
  • Another technical problem to be solved by the present invention is to provide an electronic metronome tuner, which simultaneously has a metronome It has two functions with the tuner; and, when indicating the tempo and pitch, pitch and pitch, an instruction unit composed of display segments on the LCD display is used.
  • Another technical problem to be solved by the present invention is to provide a control method for controlling an electronic beat tuner to complete a beat demo and a tuning function.
  • the technical solution of the present invention is described as follows:
  • An electronic metronome tuner includes: a casing, an LCD display, an indicating unit, a key unit, a microphone, a speaker, and a control unit;
  • the indication unit is composed of indication points arranged in a line 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 a casing, and a microphone pickup hole and a speaker sound hole are provided at corresponding positions on a panel of the casing;
  • the control unit includes: a central processing unit, an LCD display circuit, an instruction circuit, a key circuit, a sound receiving processing circuit, and an audio output circuit;
  • the input of the key circuit is connected with the key unit, and the output of the key circuit is connected to the central processing unit, and is used to transmit the information of the key pressing to the central processing unit;
  • the input of the sound receiving and processing circuit is connected to a microphone, and the received sound signal is filtered and amplified and output to the input end of the central processing unit;
  • the instruction circuit receives a control signal from the central processing unit, and the control instruction unit indicates the tempo or pitch, pitch, and pitch;
  • the LCD display circuit receives the output information of the CPU and outputs it to the LCD display;
  • the audio output circuit receives the audio signal output by the CPU and outputs the amplified signal to the speaker;
  • the central processing unit is responsible for signal analysis and processing, and outputs control signals and audio signals, which are the core of the present invention
  • the present invention can enter the tuner mode through the key unit.
  • the central processing unit measures the level of the sound input by the sound receiving processing circuit, and the control and instruction unit indicates according to how much the sound is higher / lower than the standard sound. Pitch, pitch or pitch; Control the LCD display to display status information;
  • the present invention can enter the metronome mode through the key unit.
  • the central processing unit outputs audio signals to the audio output circuit, drives the speaker to play the beat prompt sound, and controls the instruction unit to press the beat at the same time.
  • the set parameters indicate the tempo and status information is displayed on the LCD display.
  • Another electronic metronome tuner according to the present invention includes: a casing, an LCD display, a key unit, a microphone, a speaker, and a control unit;
  • the LCD display includes an indication unit formed by arranging liquid crystal display segments arranged in a specific display area of the LCD display as the indication points, and the LCD display and the key unit are installed on a casing panel;
  • the microphone and the speaker are installed in a casing, and a microphone pickup hole and a speaker sound hole are provided at corresponding positions on a panel of the casing;
  • the control unit includes: a central processing unit, an LCD display circuit, a key circuit, a sound receiving processing circuit, and an audio output circuit;
  • the input of the key circuit is connected with the key unit, and the output of the key circuit is connected to the central processing unit, and is used to transmit the information of the key pressing to the central processing unit;
  • the input of the sound receiving and processing circuit is connected to a 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 an audio signal output from the central processing unit, and outputs the amplified audio signal to a speaker;
  • the LCD display circuit receives output information of the central processing unit, outputs the information to the LCD display, receives control signals output by the central processing unit, and controls the indication points of the indication unit on the LCD display to indicate the beat or pitch, pitch, and pitch;
  • the central processing unit is responsible for signal analysis and processing, and outputs control signals and audio signals.
  • the present invention can enter the tuner mode through a key unit. In this mode, the central processing unit measures the input sound level and controls the LCD display.
  • the indicating unit indicates the pitch, pitch or pitch according to how much higher / lower than the standard tone; controls the LCD display to display status information;
  • the present invention can enter the metronome mode through the key unit.
  • the central processing unit outputs audio signals to the audio output circuit, drives the Yang sounder to play the beat prompt sound, and simultaneously controls the indication unit of the LCD display to indicate the beat according to the set parameters. , And display status information through LCD display.
  • the control method of the electronic beat tuner according to the present invention includes the following steps:
  • Step 1 Power on and initialize the system.
  • Step 2 Scan to determine whether there is a key command to switch to the metronome mode. If it is switched to the metronome mode, go to step 4. Otherwise, go directly to the tuner mode and go to step 3.
  • Step 3 Obtain the tuning parameter information, analyze the input sound, convert the analysis result into a control signal, the control instruction unit indicates the pitch, pitch, or pitch, and control the LCD display to display status information. When prompted by the display, it is required to change the indication unit to select the # or b display mode, then change the # or b display mode;
  • Step 4 Obtain demo beat information, set parameters, output the required beat audio signals to drive the speaker to play beat prompt sounds, and control the instruction unit to indicate the beat, and control the LCD display to display status information.
  • Step 5. If a shutdown command is scanned, close The metronome tuner enters the sleep standby state.
  • the electronic metronome tuner of the present invention uses a single-chip microcomputer as the core central processor and cooperates with other functional circuits to complete the control of various equipment, and achieves both the metronome and the tuner functions in the same device.
  • FIG. 1 is a schematic outline view of an embodiment of an indication unit composed of a small light bulb or a light emitting diode according to the present invention
  • FIG. 2 is a schematic circuit diagram of an embodiment of an indication unit composed of a small light bulb or a light emitting diode according to the present invention
  • FIG. 3 is a schematic diagram of a multi-voice demonstration of the present invention.
  • Fig. 4 is a schematic diagram of a multi-voice demonstration of the present invention 2: a 4-beat sound principle
  • FIG. 5 is a schematic outline diagram of an embodiment of an indication unit composed of display segments on an LCD display according to the present invention.
  • Fig. 6 is a schematic circuit diagram of an embodiment of an indication unit using a display segment on an LCD display according to the present invention. detailed description
  • Example 1 As shown in FIG. 1, the electronic metronome tuner according to Embodiment 1 of the present invention includes: a casing 1, an indication unit 2, an LCD display 3 , a key unit 4, a microphone, a speaker, and a control unit;
  • the indication unit 2 is composed of the indication points 5 arranged linearly on the panel of the cabinet 1.
  • the indication points 5 may be light emitting diodes or small light bulbs; linear arrangement means that all the light emitting diodes or small bulbs have an overall direction after being arranged. And not necessarily aligned in a straight line as shown in Figure 1.
  • the light-emitting diode or small light bulb is in the indicating state when it is on, and the non-indicating state when it is not on;
  • the LCD display 3 and the key unit 4 are also installed on the panel of the cabinet 1.
  • the cabinet panel is provided with a microphone pickup hole 6 and a speaker sound hole 7, and the microphone pickup hole 6 and the speaker sound hole are provided in the cabinet.
  • Microphones and speakers are installed at the corresponding positions on the back of 7;
  • the control unit of the electronic metronome tuner according to Embodiment 1 of the present invention includes: a central processing unit 100, an instruction circuit 101, an LCD display circuit 102, a key circuit 103, a sound receiving processing circuit 104, and an audio output circuit. 105;
  • the input of the key circuit 103 is connected to the key unit, and the output of the key circuit 103 is connected to the central processing unit 100, and is used to transmit the information of the key pressing to the central processing unit 100; the input of the sound receiving processing circuit 104 and 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 audio signal output from the central processing unit, and outputs the amplified output to the speaker;
  • the instruction circuit 101 receives the control signal of the central processing unit 100, and controls the light emission of the point indicated by the instruction unit;
  • the LCD display circuit 102 receives the output information of the central processing unit 100, and outputs it to the LCD display;
  • the central processing unit 100 is a core part of the control unit of the present invention. After the power is turned on, the central processing unit controls the entire circuit to enter the working state of the tuner; the circuit can be switched to the metronome state by pressing the key unit.
  • the central processing unit receives a musical instrument or other sound input from the microphone, and then performs frequency measurement and frequency analysis, and then calculates the group order, note name, and cent deviation based on the result of the spectrum analysis; finally, the central processing unit
  • the calculator converts the calculated result into a control signal and outputs it to the indication unit and the LCD display.
  • the control indication unit indicates the pitch, pitch or pitch according to how high / low, and controls the LCD display to display status information.
  • the status information displayed on the LCD display may include pitch status information
  • the related pitch state information includes all twelve average pitch names of ascending and twelve average pitches of descending Names, that is: "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 ".
  • the central processor In metronome mode, the central processor first displays the default beat parameter information on the LCD display. If the user needs to change the default parameters, enter the parameters through the key unit. After the central processor obtains the parameter information of the beat that needs to be demonstrated, it performs Parameter setting; then, output the beat reminder signal to the speaker, drive the speaker to play the beat reminder, and meanwhile control the instruction unit to indicate the beat according to the set parameter, and display status information through the LCD display.
  • the beat reminder sound can be set as a beat reminder sound whose sound intensity is inverted.
  • the so-called inverting beat prompt sound refers to the frequency of the corresponding beat prompt sound when the strong beat is demonstrated, such as the strong beat sound " ⁇ "; and the corresponding beat prompt sound when the weak beat and the non-strong beat are demonstrated. High frequency, such as weak and non-strong beat sound "da".
  • the snare drum is a bass drum for strong beats
  • the snare drum is for a weak beat
  • the national percussion is a wooden fish beat for a strong beat
  • a double bass knock the larger diameter side
  • the high pitch of the double-sounding tube makes a weak shot, such as " ⁇ ⁇ ⁇ , ⁇ ⁇ ⁇ "
  • ⁇ ⁇ ⁇ ⁇ ⁇ , ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ?? are examples of low beat frequencies and high non-strong beat frequencies; the same is true for the rhythm of a musical instrument or band:
  • the performances are strong beats with 4, 5, and 6 strings (bass strings), and weak beats with 1, 2, and 3 strings (treble strings); in the band, strong beats are played by bass or cello, and other instruments are not strong beats. Wait.
  • This beat prompt sound which is opposite to the practice of music, brings a lot of inconvenience to the user.
  • the present invention can overcome this problem by inverting the beat prompt sound of the strength of the sound. The feeling of the artist and the sense of music.
  • the control unit takes the central processing unit as the center to complete the metronome and tuner control functions; it realizes the input of key control signals and sound information, the instruction control of the instruction unit, and the output of the LCD display information. And beat audio signal output control.
  • the central processing unit 100 is a single-chip microcomputer (MCU) and its auxiliary circuits; the selected single-chip microcomputer is S 3P72N4.
  • the output ports P3 (P3. 1-P3. 3) and P8 (P8. 2-P8. 7) of the microcontroller are connected to the instruction unit circuit 101, the key circuit 103 is connected to the P6 port of the microcontroller, the sound receiving processing circuit unit 104 and audio
  • the output circuit unit 105 is connected to a port corresponding to the microcontroller.
  • the LCD display circuit 102 includes an LCD display chip, and the selected model is the LCD display chip C8555.
  • the SEG output port and COM output port of the microcontroller are connected to the SEG and COM ports of the LCD display chip; the LCD display chip receives the input from the CPU Out, the output of the LCD display chip is connected to the LCD display.
  • the present invention adopts a vertically arranged indication unit, that is, the arrangement of all indication points is a longitudinal arrangement, and all the indication points are arranged vertically as a whole.
  • Each light emitting diode or small light bulb is independently installed on the casing 1 and arranged in a vertical linear shape, or all the light emitting diodes or small bulbs are formed into a vertically aligned whole, and then installed on the casing 1 to form a longitudinal indicating unit;
  • Indication circuit (longitudinal indication circuit) 101 includes two sets of triodes. Any combination of each of the two sets of triodes controls a light-emitting diode or a small light bulb of a longitudinal indication unit on a casing. The output of the central processing unit is controlled by The two groups of triodes are turned on to control the light emitting of the light emitting diode or the small light bulb of the vertical indicating unit.
  • Each key including the key circuit 103 corresponds to an electric key.
  • the electric key connects the corresponding circuit to the single-chip microcomputer.
  • the sound receiving and processing circuit 104 filters the input sound signal after RC filtering, and then passes through the two-stage integrated operational amplifier LM385. The amplified output is output to the P1.0 port of the single-chip microcomputer.
  • the audio output circuit 105 is a power amplifier circuit connected to the P2.3 port of the single-chip microcomputer. After the audio signal is amplified by the power, it drives the speaker to make sound.
  • the audio output circuit and sound receiving process The circuits have standard output / input jacks.
  • the sound receiving processing circuit and the audio output circuit of the present invention can of course also have only a jack without a speaker and a microphone. Such a design is more conducive to the miniaturization (but inconvenient use) of the present invention, and directly with a speaker and a microphone. It is a common replacement on the circuit.
  • the electronic metronome When performing a beat demo, the electronic metronome can be brought into a beat demo state through the key unit.
  • the single chip microcomputer controls the LCD display to display prompt information through the LCD display circuit, and then receives the desired beat information from the key circuit through the key unit, and the single chip microcomputer will respond accordingly.
  • the beat prompt sound is sent to the loudspeaker for broadcast; at the same time, the vertical indication unit is controlled to display the beat in the vertical direction, and the LCD display is controlled to display the status information.
  • the electronic metronome can be brought into the tuning state through the key unit.
  • the single chip microcomputer controls the LCD display to display the prompt information through the LCD display circuit, and then receives the tuning project information from the key circuit through the key unit, and then receives the needs from the microphone.
  • the sound of the calibration sound; the control unit determines the sound level, and controls the vertical indicating unit to indicate the pitch, pitch or pitch in the vertical direction; and at the same time, controls the LCD display to display status information.
  • the functions of the metronome and the tuner are realized, and electronically arranged light emitting points are used to indicate the beat or display pitch, pitch, or pitch, which is more in line with the laws of music practice.
  • the control unit controls The vertical indication unit makes all or part of the indication points emit light from top to bottom, and at least one of the indication points is illuminated at each moment. At the end of the first half of the shot, the lowest indication point of all indication points is illuminated. It can be moved (visual effect). In the first half of the shot, the light emitting point starts from one of all the indicated points and moves to the bottom of all the indicated points.
  • more than one indicator point can be illuminated at the same time to demonstrate the beat. For example, from top to bottom (same as the first half of the music shot), all or part of the indicator points are illuminated in order. The indicator points after the light do not go out. All lights from the starting point to the bottom point are turned off at the same time.
  • This demonstration method only needs the indicator point to be turned off at the same time as the first half of the beat. It is a simple replacement of the above control method. It can also use the delayed turn-off method to make the movement of the light point (visual effect) look like dragging a tail to demonstrate the beat. .
  • the control unit controls the indication points from the bottom of the electronic light emission point, and causes all or part of the indication points to light up in order from bottom to top.
  • the last indication point of the light is emitted; that is, in the second half of the shot, the light emission point starts from the lowest indication point of all the indication points, moves to a certain indication point, the second half of the shot ends, and the next beat is started.
  • the range of light-emitting indication points is equal to all electronic light-emitting points; when a weak shot is demonstrated, the range of light-emitting indicator points is less than or equal to one-half of all electronic light-emitting points.
  • one up and one down is a beat, and the range mentioned here refers to the sequential continuous light-emitting indicator points when the demonstration is complete, including those indicator points; if the light-emitting points are regarded as movable, so The range described is the range of electron emission points that the light emission point passes in one beat.
  • the vertically-arranged indication points of the longitudinal indication unit include a central indication point 8. As shown in FIG. 1, there are a certain number of indication points above and below the central indication point. Generally, the number of indication points is above and below. The number below is the same, and the number is determined by the designer. The larger the number, the better the visual experience of the presentation and the school sound, but the larger the occupied space and the higher the cost.
  • the central indication point 8 is illuminated, and the remaining indication points are not illuminated; if the sound is higher / lower by a few units, the number above and below the central indication point 8 from the central indication point 8 is off the sound.
  • the indication points with the same number of high / low units are illuminated; that is, if the sound is one unit higher, the first indication point adjacent to the central indication point 8 above the central indication point 8 is illuminated, and the remaining indication points are not illuminated; Two higher ⁇ For the unit, the second electronic indicating point 8 above the central indicating point 8 emits light, and the remaining electronic indicating points are not bright, and so on; if the sound is one unit lower, the first adjacent to the central indicating point 8 below the central indicating point 8 is the first If one sound is two units lower, the second electronic indicator below the central indicator point 8 will emit light, the remaining electronic indicators will not light, and so on.
  • the unit of high / low sound can be high / low one cent or several cents, or high / low one hertz or several hertz, according to the number of indicated points and the accuracy of the tuning Degree requirements to determine.
  • the above instruction method allows the user to know the pitch of the strings of his instrument very intuitively, and knows the gap from the standard pitch, and demonstrates the beat in this vertical manner, which is consistent with the beat of the beat in music practice.
  • the actual law of strong beats and large weak beats is intuitive, and the image is intuitive, making it easier for people to understand the connotation of music beats.
  • the number and types of keys in the key unit 4 of the present invention vary according to the requirements and settings of the control software, and generally include at least five keys: In the metronome state, they are: 1 Beat start / stop and power switch function key , 2 Beat-type setting and conversion into the tuner mode function keys, 3, 4 Beat-speed setting plus / minus key, 5 Shows the time value setting of the beat sound and shows the function part of the beat sound option function; In the state of the tuner, respectively For: 1 Up / Down display mode selection function key and power switch function key, 2 Tuning mode option button and transition into metronome mode function key, 3, 4 Manual tuning +/- selection or demonstration +/- selection Keys, such as selecting the 1-string or 2-string tuning of the guitar or selecting the 2-string or 3-string of the guitar when setting the demo sound, while 3, 4 and the 440Hz standard setting +/- button, 5 the standard sound demonstration setting button, To describe that a key has other functions means that a key has two functions. The two functions are controlled by a single-chip microcomputer program
  • Embodiment 2 of the present invention provides an electronic beat tuner using liquid crystal display segments arranged vertically in a specific area of an LCD display as a vertical indicating unit.
  • Principles and functions of each part of the electronic beat tuner of Embodiment 2 The circuit is similar to the electronic beat tuner of Embodiment 1.
  • the longitudinal indication unit of Embodiment 2 is composed of liquid crystal display segments arranged vertically in a specific area of the LCD display, and the control unit makes corresponding adjustments; as shown in FIG.
  • 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 a panel of the casing 1; the display screen of the LCD display 3 A specific area is provided with a vertical indicating unit 2 composed of liquid crystal display segments 9 arranged vertically on the display screen, and each liquid crystal display segment 9 has two states of display and non-display, which are used to indicate an instruction state and a non-instruction state.
  • the microphone and speaker are installed in the casing, and a microphone pickup hole 6 and a speaker sound hole 7 are provided on the casing panel;
  • the control unit according to the second embodiment of the present invention does not include an instruction circuit.
  • the functions of the key circuit, the sound receiving processing circuit, and the audio output circuit are exactly the same as those of the corresponding parts of Embodiment 1 of the present invention.
  • the functions of the central processing unit and the LCD display circuit are also very close.
  • the central processing unit 100 includes: , LCD display circuit 110, key circuit 140, sound receiving processing circuit 130, audio output circuit 120, and power supply circuit 150.
  • the signal of the sound receiving and processing circuit can be output to a headphone jack and the signal of the audio output circuit to a pickup.
  • the two jacks are combined into one, and a common jack is used to implement the functions of these two jacks.
  • FIG. 6 it is a schematic circuit diagram of an embodiment of the present invention using a two-in-one jack.
  • the common jack is a two-channel headphone jack.
  • the common end of the two-channel jack is connected to the ground wire, and one circuit channel is connected.
  • Microphone the other circuit channel is connected to the speaker.
  • the dual-channel headphone socket is used as a pickup jack. When the pickup is inserted, the circuit channel connected to the microphone will be automatically disconnected to cause the pickup to receive external signals and the microphone will not function.
  • the audio output circuit (power Amplifier circuit) is in a non-working state, so there is no effect on the sound signal output function;
  • the silent channel headphone socket is also used as a headphone jack.
  • the circuit channel connected to the speaker will be automatically disconnected.
  • the speaker does not make sound and the earphone generates a sound signal.
  • the sound receiving processing circuit since the sound receiving processing circuit is in a non-working state, there is no influence on the external signal receiving function of the tuner.
  • the input of the key circuit 140 is connected to the key unit 4, the output of the key circuit 140 is connected to the central processing unit 100, and is used to transmit the information of the key pressing to the central processing unit; the input of the sound receiving processing circuit 130 and 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 audio signal output from the central processing unit 100 and is amplified Output to 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 indicating unit 8, and completes the corresponding control instruction function;
  • the work flow 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 vertical indicating circuit; Instead, the control command is transmitted to the LCD display circuit, and the LCD display circuit controls the liquid crystal display section of the vertical indicating unit to complete the vertical indicating function.
  • the central processing unit 100 is a single-chip microcomputer (MCU) and its auxiliary circuits; the selected single-chip computer model is S3P72N4.
  • the COM and SEG output ports of the single-chip microcomputer are connected to the input ports 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.
  • the port and the audio output circuit unit 120 are 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 to the SEG and COM ports of the LCD display chip.
  • the LCD display chip not only receives prompt information from the microcontroller and outputs it to a designated area of the LCD display. In addition, it receives control information from the single-chip microcomputer, and completes display control of the display segment in the liquid crystal vertical indicating unit 2.
  • the control unit directly controls the liquid crystal vertical indicating unit 2 to instruct the tempo or receive an input sound signal from a microphone, to determine the level of the sound, and to control 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 a prompt sound or a beat sound signal from the speaker to complete the sound output function; the control unit controls the LCD display 3 to display information.
  • the electronic metronome When performing a beat demo, the electronic metronome can be brought into a beat demo state through a key unit, the control unit controls the LCD display 3 to display a prompt message, 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 and broadcasted; at the same time, the liquid crystal vertical indicating unit 8 of the LCD display is controlled to display the beat vertically, and the LCD display 3 is controlled to display the status information.
  • the electronic metronome can be brought into the calibration state through the key unit, the control unit controls the LCD display to display prompt information, and then receives the calibration item information from the key unit, and then receives the sound that needs calibration from the microphone; control The unit judges the level of the sound, and controls the liquid crystal vertical indicating unit 2 of the LCD display to indicate the pitch, pitch, or pitch vertically; at the same time, it controls the LCD display to display status information.
  • the vertically arranged liquid crystal display section 9 of the liquid crystal vertical indicating unit 2 of the LCD display 3 includes a central display section 10, and a certain number of liquid crystal display sections are provided above and below the central display section 10.
  • the electronic beat tuner control unit controls the liquid crystal display section 9 of the vertical indication unit 2 of the LCD display.
  • the manner of vertically indicating the beat and the pitch, pitch, and pitch is controlled by the control unit in the first embodiment
  • the vertical indication unit indication point indicates the beat in exactly the same manner as the pitch, pitch, and pitch.
  • the present invention provides a variety of beat prompt sounds to meet different needs.
  • the user can choose any one or a combination of them according to the needs.
  • the beat prompt sound output from the speaker includes two types of sounds: one is an analog sound of a rattle, which can be a small wooden fish sound, a high and low double-barrel sound, a bumper ringtone, and a rattle sound; and the other is a human voice
  • the number of beats 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 flat male voice count and so on.
  • the beat reminder sound also includes a multi-part beat reminder sound formed by a mixed sound formed by a combination of different reminder sounds.
  • the multi-part beat prompt sound may be composed of different simulated sounds, different vocal counts, and a mixed sound of a combination of simulated vocals and vocal counts.
  • the analog sound includes “ ⁇ ” and “Da”
  • the number of human voices includes English “ONE”, “TWO”, “THREE”, “FOUR”, “FIVE”, “SIX”, and “ AND ".
  • it can also be a voice of the same meaning in Chinese or other countries.
  • the mixed sound of the analog sounder and the vocal number beat refers to a sound made by a single analog sounder and a single vocal number beat, including " ⁇ + 0NE”, “Da + TW0”, “Da + THREE “, '” Da + FOUR “,” Da + FIVE “,” Da + S IX “, and” Da + AND ",
  • the sound prompting sound of the silent part refers to two different types of sounds, namely, human vocal beats and simulated ringer sounds, which respectively indicate different rhythmic sound patterns of the two parts, including one-to-two, two-to-three, and two-to-four. and many more,
  • the one-to-two means that one part is a quarter note, which is a number of beats of a human voice, and each beat sounds one beat, and the second part is an eighth note, which is a percussion sound, two beats per beat, two
  • the part reverb effect is " ⁇ + 0NE" — one
  • the one voice part and the two voice parts can be interchanged.
  • One is to solidify the beat reminder sound into the ROM of a central processing unit, such as a single-chip microcomputer. This eliminates the need to add new chips and circuits, which is beneficial and saves hardware costs.
  • the capacity of the ROM of the single-chip microcomputer is limited, and it cannot provide more function options, so that the beat reminder tone is monotonous and the function is single. Therefore, generally, a method of adding a voice chip can also be used to store multiple beat reminder sounds. Regions and people provide personalized services.
  • the part 120 in FIG. 6 is a circuit diagram of an embodiment in which the audio output circuit of the present invention includes a voice chip.
  • the voice chip is a voice chip WK2134.
  • Pins 1 and 8 are power and ground respectively.
  • Pin 9 is connected to a resistor to The power supply, coupled with the internal oscillator circuit, generates the clock signals required by the chip.
  • Various analog sounds and human voices set by the present invention are recorded, edited and converted into a certain format such as ADPCM data format in advance, and stored in the memory of the chip.
  • P. 0, PI. 1, PI. 2 and PI. 3 of the voice core are data communication ports, which are connected to the microcontroller I / O, receive control commands from the CPU, and send the control commands to the microcontroller. Send an acknowledge signal.
  • the control command of the single-chip microcomputer actually requires the voice chip to emit a certain kind of sound in real time. After receiving the instruction, the voice chip outputs the data of the sound, and outputs the sound signal on the second pin after the internal decoding circuit, and then passes the external signal.
  • the chip 7368 in FIG. 6 is a voice amplification chip. After the sound signal is amplified, the speaker is driven, and the sound to be emitted can be output from the speaker. '
  • the control method of the electronic beat tuner according to the present invention includes the following steps:
  • Step 1 Power on and initialize the system.
  • Step 2 Scan to determine whether there is a key command to switch to the metronome mode. If it is to switch to the metronome mode, go to step 4. Otherwise, go directly to the tuner mode and go to step 3.
  • Step 3 Obtain the tuning parameter information, analyze the input sound, convert the analysis result into a control signal, the control instruction unit indicates the pitch, pitch, or pitch, and control the LCD display to display status information. When prompted by the display, it is required to change the indication unit to select the # or b display mode, then change the # or b display mode;
  • Step 4 Obtain demo beat information, set parameters, output the required beat audio signals to drive the speaker to play beat prompt sounds, and control the instruction unit to indicate the beat, and control the LCD display to display status information. Step 5. If a shutdown command is scanned, close The metronome tuner enters the sleep standby state.
  • the mode selection button can be adjusted to make the present invention be in different states of the metronome or the tuner, and the state of entering the tuner directly after powering on can simplify the operation steps; if the metronome mode is selected, no steps are added.
  • the third step described in the present invention controls the function of the present invention to complete the tuning, and some functions related to the tuning, specifically including the following steps:
  • Step 30 Display the default information through the LCD display
  • Step 31 Perform key scan. If there are relevant commands, go to step 5. If you want to switch to metronome mode, go to step 4. If you want to change the A4 standard sound standard by pressing the keys on the LCD display, change the A4 standard. Tone standard, go to step 32; if A4 demonstration pronunciation, go to step 34; if there is no key instruction, go to step 32;
  • Step 32 Perform frequency measurement and spectrum analysis on the input instrument sound, compare with the set standard tone frequency, and calculate the difference between the group order, the note name, and the cent;
  • Step 33 convert the calculated result into a control signal, the control instruction unit indicates the pitch, pitch or pitch, control the LCD display to display status information, and perform step 31 again;
  • Step 34 Whether to change the parameters of the A4 demonstration tone. If it is changed, press the key to raise the LCD display. Shown, change the parameters of the A4 demonstration tone, go to step 35; otherwise go directly to step 35;
  • Step 35 Perform the A4 demonstration pronunciation; if there is an instruction to stop the A4 demonstration pronunciation, stop the A4 demonstration pronunciation, and execute step 31 ; if the A4 demonstration pronunciation instruction is not stopped, proceed to step 34.
  • the working mode of the present invention can also be changed by a mode selection button.
  • the LCD display cooperates with the key unit to communicate with the user to complete the selection of different functions and the setting of different parameters.
  • Changing 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 invention measures the frequency of the input instrument sound, and compares the frequency of the standard sound set with parameters after performing spectrum analysis to calculate the difference between the input instrument sound and the standard sound in calculating the group order, sound name and cent,
  • This information is displayed on the LCD display, and at the same time, according to a preset unit, it is calculated which indication point should be brought into the indication state to indicate the level of the input sound, and a corresponding control signal is output to complete the instruction.
  • the frequency range corresponding to the indication point is not linear, but the frequency range corresponding to the middle is narrow (the middle ones can be linear, which is good for adjustment), in order to achieve higher accuracy of the tuning;
  • the corresponding frequency range is wider, and the tone frequency range is increased.
  • the top / bottom indication points can include all frequency ranges that are higher / lower than the set frequency value.
  • A4 demonstration pronunciation is a commonly used function of the tuner. After selecting this function, set the parameters (mainly frequency) for pronunciation, and the single-chip microcomputer will drive the speaker to emit the A4 demonstration tone of this frequency.
  • the pronunciation frequency can be 435. -Between 445Hz or greater.
  • step 31 the present invention implements function conversion by using a key unit.
  • the key unit described in Embodiment 1 of the present invention is used as an example for description:
  • the keys are ascending / descending display mode selection function keys and power switch function keys at the same time.
  • One key has other functions, which means that one key has two functions.
  • the continuous detection of a key signal is continued Time is designed to be a function within a certain time (user presses the key for a short time), and duration of continuous detection of a key signal is more than a certain time (user presses a key to be pressed) as another function.
  • this button for the convenience of the user, generally not commonly used functions, such as the mode switching function and the power switch function, are set to the functions corresponding to the long press of the button.
  • the microcontroller After the microcontroller scans the button unit for signals, it analyzes and determines the address of the button and the length of the button. According to the current mode status, the corresponding control function is activated. In the tuner mode, the button is pressed briefly. The display circuit controls the LCD display to display the ascending or descending display mode, according to the ascending / descending display mode selected by the user by pressing the button 1; In the tuner mode, 1 press and hold the button. If the beat tuner is turned off at this time, then The single chip microcomputer is powered on, and the power is self-checked. If the beat tuner is in working state at this time, the single chip microcomputer is turned off and directly enters the off state or standby state. If within a certain period of time (such as 5 minutes), the single chip microcomputer does not scan any key signals or If no input signal is detected, it enters the sleep shutdown state.
  • a certain period of time such as 5 minutes
  • the support of the single-chip microcomputer for the conversion of other key functions is similar to the 1 key. If it is a parameter setting function, the single-chip microcomputer controls the LCD display to display optional parameters. After the user selects the parameter by pressing the key, the single-chip microcomputer 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.
  • the key is an option key for the tuning mode and a function key for switching to the metronome mode.
  • the tuning modes include: guitar, bass, violin, guzheng, dulcimer, erhu, and twelve equal temperament tuning modes.
  • the 3 and 4 keys are also the 440Hz standard setting +/- key, that is, press and hold the 3 key to make Uplink setting: 435, 436, 437 ... 45, long press 4 key for downlink setting: 445,
  • the button is a standard tone demonstration setting button. Press this button to enter the A4 demonstration pronunciation state.
  • the microcontroller scans the button without the demonstration tone, the 5 signal sets the pronunciation and outputs the demonstration.
  • the single-chip microcomputer scans the button 5 signal to set to stop the pronunciation, and does not output the demonstration tone.
  • the fourth step is to control the present invention to complete the beat demo and related functions, including the following steps: Step 40: Display the default information through the LCD display;
  • Step 41 Perform a key scan. If a shutdown command is scanned, go to step 5. If a switch to the tuner mode command is scanned, go to step 4. If you press the key and change the beat parameters on the LCD monitor, the so-called beat parameters include Beat type, tempo, one-part time, two-part time, percussion beat sound type, change the beat parameter, go to step 42; if the timer overflows, reset the timer; if no key is detected during scanning Instruction, execute step 42;
  • Step 42 Perform parameter setting, and calculate the frequency division of the control instruction unit and the indicating sound.
  • the so-called dynamic display status information refers to the demo during the beat.
  • the part of the display pen segment of the LCD display that changes synchronously with the beat demo during the process, including the up and down dynamic presentation of the vertical indication unit and the one-by-one cumulative display of the number of measures;
  • Step 43 Go to Step 41.
  • the user who cooperates with the LCD unit through the LCD display obtains the required beat information, and the single-chip microcomputer converts the beat information to be demonstrated into the single-chip clock frequency information.
  • the IC extracts the beat reminder sound, outputs the audio signal at the required rhythm, and calculates the range and time of the indication point entering the indicated state according to the strong beat and weak beat and frequency information, and converts the calculation result into a control signal.
  • the control instruction unit instructs the beat, and passes The LCD display shows status information.
  • the keys are: 1 Beat start / stop and power switch function key.
  • the single-chip computer detects the key signal through scanning and only lasts within a specific time (such as 1 second). It starts under the stop state of the beat demo. The beat demonstration is stopped while the beat demonstration is in progress. If the single-chip microcomputer scan detects that the key signal continues for more than a specific time, the power is turned off to enter the sleep state.
  • the beat types include: 1/4 beat, 2/4 beat, 3/4 beat, 4/4 beat, 3/8 beat, and 3/8 beat.
  • the single-chip microcomputer scan detects 2 key signal and lasts only within a specific time (such as 1 second), it will set and display the beat pattern one by one until the customer confirms; the single-chip microcomputer scan detects that the 2 key signal lasts more than a specific time. Change the current metronome to the tuner mode. 3, 4
  • the tempo setting +/- key, the speed range is 200 steps: 30—230 beats / minute.
  • the short press is set to the acceleration / deceleration setting of 1 by one, and the long press is the continuous fast increase / decrease.
  • Deceleration setting when the single chip computer detects that the conduction time of these two keys is less than the rated time (such as 1 second) during the key scanning process, it is judged as a short press (the key is raised again in a short time after being pressed). And it is displayed as a step-by-step increase / decrease of the tempo.
  • the single-chip microcomputer scan detects the 3 or 4 key signal and only lasts within a specific time, it will set and display the speed change one by one until the customer confirms (no longer press the key); the single-chip microcomputer scans. It is detected that the 3 or 4 key signal lasts for more than a certain time, then the speed is continuously set and displayed, and the speed change is displayed until the customer confirms to stop pressing the key.
  • the function key for setting the time value of the beat sound including quarter notes, eighth notes, triplets, sixteenth notes, etc. of a part (percussion sound). Short press this key to select the setting, and long press this key to select Set the second part (voice count) to quarter note, eighth note, or rest. If the user selects a part, that is, short press the 5 key, the microcontroller scans the 5 key as a short press. State, that is, to set and display the time of each voice in turn until the customer confirms that the key is no longer pressed. If the user selects the second voice, press and hold the key 5 (press and hold), and the microcontroller scans to the key 5 for a long press.
  • the microcontroller detects the relevant signal and sets and displays it. For the relevant time value data, if the 1 key is pressed again for a short time, the single-chip microcomputer detects the 1 key signal and only lasts for a certain period of time.
  • the tempo demo is currently stopped, it will start a 2-3-beat demo; for another example, during the tempo demo In the state, the beat demo of 2 to 3 beats is displayed as a sixteenth note of a single part: short press 5 to set one part to sixteenth note, and then long press 5 to set the second part as a rest (ie The second part does not pronounce).
  • the single-chip computer detects and sets the sixteenth note of the first part and the rest of the second part.
  • the single-chip setting changes the three-tone sound of the current one part 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, it is silent.
  • the microcontroller After the microcontroller scans the key unit for a signal, it analyzes and determines the address of the key and the length of the key. According to the current mode status, the corresponding control function is started. In metronome mode, the key is pressed briefly. The microcontroller uses the relevant circuit to stop the beat demonstration. Start the beat demo and stop the beat demo while the beat demo is in progress. Press and hold the 1 button in the metronome mode. If the beat tuner is turned off at this time, the microcontroller turns on the power and powers on the self-test. When the device is in the working state, the microcontroller shuts off the power and directly enters the sleep standby state; if the microcontroller does not scan any key signal for a certain period of time (such as 5 minutes), it enters the sleep standby state.
  • a certain period of time such as 5 minutes
  • All the parameters of the present invention include a default parameter. These parameters are the most commonly used parameters among the optional parameters for the convenience of users.
  • the electronic beat tuner according to the present invention may include a RESET function, which can restore all parameters back to default parameters.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • General Physics & Mathematics (AREA)
  • Auxiliary Devices For Music (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un appareil électronique indiquant le tempo et corrigeant la tonalité, comprenant un boîtier, un indicateur, un écran à cristaux liquides, une unité de raccourci clavier, un microphone, un haut-parleur et une unité de commande. L'indicateur consiste en des points indicateurs qui sont disposés longitudinalement sur la surface du boîtier. L'écran à cristaux liquides et l'unité de raccourci clavier sont assemblés sur le cadran du boîtier, l'unité de commande commande directement l'indicateur pour qu'il indique le tempo, et le haut-parleur sort ensuite le signal sonore indiquant le tempo. Le microphone peut également recevoir le signal sonore, le niveau sonore est évalué, après quoi l'unité de commande commande l'indicateur, de sorte qu'il indique le niveau sonore. L'unité de commande commande également l'écran à cristaux liquides pour qu'il affiche les informations d'indication. L'appareil de l'invention possède les fonctions d'un métronome et de correction de tonalité, il permet d'économiser le coût du matériel et d'économiser de l'espace. Il utilise l'appareil électronique pour indiquer le tempo et pour corriger la tonalité très facilement, parce que lorsque l'appareil affiche le tempo ou corrige la tonalité, les informations d'indication sont indiquées de manière longitudinale, ce qui est approprié à l'habitude des gens.
PCT/CN2003/000954 2002-11-26 2003-11-12 Appareil electronique indiquant le tempo et corrigeant la tonalite et procede de commande WO2004049078A1 (fr)

Priority Applications (2)

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CNB2003801032476A CN100538560C (zh) 2002-11-26 2003-11-12 电子节拍校音器及其控制方法
AU2003284803A AU2003284803A1 (en) 2002-11-26 2003-11-12 Electronic apparatus for indicating beat and correcting tone and control method thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CNA02152355XA CN1503088A (zh) 2002-11-26 2002-11-26 一种电子节拍校音器的纵向演示的方法
CN02152355.X 2002-11-26
CNU032029160U CN2602456Y (zh) 2002-11-26 2003-02-16 一种节拍－校音器的二合一插座电路
CN03202916.0 2003-02-16

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CN1805002B (zh) * 2006-01-12 2011-08-24 深圳市蔚科电子科技开发有限公司 一种定音器及其实现方法
CN103166262A (zh) * 2011-12-14 2013-06-19 硕天科技股份有限公司 不断电系统的操作面板及其操作方法
CN105719631A (zh) * 2014-11-30 2016-06-29 南京化工职业技术学院 一种电子数显式节拍器
CN105719629A (zh) * 2014-11-30 2016-06-29 南京化工职业技术学院 一种低压直流式节拍器

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CN1805003B (zh) * 2006-01-12 2011-05-11 深圳市蔚科电子科技开发有限公司 一种音准训练方法
JP4640407B2 (ja) * 2007-12-07 2011-03-02 ソニー株式会社 信号処理装置、信号処理方法及びプログラム
CN104269164A (zh) * 2014-09-11 2015-01-07 苏州市职业大学 一种简易编曲混音节拍装置
CN106205279B (zh) * 2016-08-29 2020-10-27 得理电子(上海)有限公司 一种音符时值的提示方法、系统及其电子设备
JP6720797B2 (ja) * 2016-09-21 2020-07-08 ヤマハ株式会社 演奏教習装置、演奏教習プログラム、および演奏教習方法
JP6720798B2 (ja) * 2016-09-21 2020-07-08 ヤマハ株式会社 演奏教習装置、演奏教習プログラム、および演奏教習方法
CN108694933A (zh) * 2017-04-06 2018-10-23 钟浩 一种带有吉他字典的电吉他
CN110097865A (zh) * 2019-05-08 2019-08-06 长沙幻音电子科技有限公司 分体式无线校音器
CN115128935A (zh) * 2022-07-25 2022-09-30 韩金龙 “v”字形数码节拍器

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CN1805002B (zh) * 2006-01-12 2011-08-24 深圳市蔚科电子科技开发有限公司 一种定音器及其实现方法
CN103166262A (zh) * 2011-12-14 2013-06-19 硕天科技股份有限公司 不断电系统的操作面板及其操作方法
CN105719631A (zh) * 2014-11-30 2016-06-29 南京化工职业技术学院 一种电子数显式节拍器
CN105719629A (zh) * 2014-11-30 2016-06-29 南京化工职业技术学院 一种低压直流式节拍器

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AU2003284803A1 (en) 2004-06-18
CN1503088A (zh) 2004-06-09
CN1711510A (zh) 2005-12-21

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