JP2003316354A - Tuner with metronome - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tuner with a metronome which detects and displays the deviations between the pitches of inputted musical tones and standard pitches meeting these pitches and which is adequate for a practice to keep producing the tones of the specified pitches at a specified tempo. <P>SOLUTION: The tuner with the metronome has detecting means 13, 14 and 19 for detecting the deviations between the pitches of the inputted musical tones and the standard pitches meeting these pitches, display means 5 for displaying the deviations detected by the detecting means 13, and metronome means 16 for producing the metronome tones meeting the assigned tempo. While the metronome tones are produced by the metronome means 16, the detecting means 13, 14 and 19 hold the detected values during the silencing of the metronome tones and send the same to the display means 15. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuner with a metronome for detecting and displaying a deviation between a pitch of an input musical sound and a reference pitch corresponding to the pitch.

[0002]

2. Description of the Related Art In order to tune a musical instrument, there is known a tuner which displays a deviation between a pitch of an input musical tone and a predetermined reference pitch. Further, a metronome that emits a metronome sound at a predetermined tempo for practicing musical instrument performance according to the tempo is known. Furthermore, a device in which a tuner and a metronome are integrated and one of the functions is selected and used is also known.

[0003]

By the way, in the case of playing a long-lasting musical instrument such as a string instrument or a wind instrument, it may be necessary to continue to produce a tone having a constant pitch at a constant tempo. Therefore, continuous sound practice may be performed in which a constant pitch and a constant pitch sound are continuously generated. In the practice of such continuous tones, a tuner that is originally used for tuning an instrument may be used to check whether or not it is possible to continue producing a tone of a certain pitch.
So, for the practice of continuous sound, consider using a conventional device with a tuner and metronome integrated,
This conventional device is convenient in terms of portability, but if you try to use the metronome function in order to maintain a constant tempo, you will not be able to use the tuner function. It is not suitable for continuous sound practice. Also, prepare a metronome and a tuner separately,
If you try to play a metronome sound from the metronome, and try to maintain a certain tempo by relying on the metronome sound that was sounded, the tuner will receive the metronome sound in addition to the continuous sound from the instrument, so the metronome sound will be heard. When this happens, the deviation displayed in the tuner is influenced by the metronome sound, and this combination is also unsuitable for practicing continuous sounds. Therefore, it is conceivable to visually notify the tempo instead of the metronome sound, but it is necessary to have skill to accurately grasp the tempo only visually without using the auditory sense.

In view of the above circumstances, an object of the present invention is to provide a tuner with a metronome suitable for practice to continue to produce a sound of a constant pitch at a constant tempo.

[0005]

A tuner with a metronome according to the present invention which achieves the above object, comprises a detecting means for detecting the pitch of an inputted musical tone, a pitch detected by the detecting means and a predetermined reference tone. A display means for displaying a deviation from the high pitch, a metronome means for generating a metronome sound according to a designated tempo, and the display means for generating a metronome sound while the metronome means is generating a metronome sound. And a control means for controlling to display the deviation immediately before the start of. With this configuration, when the practitioner listens to the metronome sound of a predetermined tempo by the metronome, when a musical tone is generated by the instrument, the deviation between the pitch of the musical tone and the reference pitch is displayed, and the metronome sound is generated. Since the display is maintained immediately before the metronome sound is generated, the deviation between the musical pitch and the reference pitch is stably displayed without being affected by the metronome sound. Therefore, the tuner with a metronome of the present invention is suitable for practicing musical instruments that generate a musical sound of a predetermined pitch while listening to the metronome sound.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

FIG. 1 is a functional block diagram showing the operation of the tuner of one embodiment of the present invention.

The tuner 1 shown in FIG. 1 is provided with a metronome function, and has a pitch detecting means 11, a reference pitch storing means 12, a deviation detecting means 13, and a notification control means 1.
4, display means 15, metronome means 16, speaker 1
7, an operator group 18, and a deviation storage means 19.

The pitch detecting means 11 is provided with an input terminal 111. A microphone (not shown in FIG. 1) is connected to the input terminal 111, and a musical sound such as a musical instrument sound picked up by the microphone is input. The pitch detecting means 11 detects the pitch of the input musical sound at predetermined intervals and sequentially sends the detected pitch to the deviation detecting means 13.

The reference pitch storage means 12 stores a plurality of reference pitches that are different from each other in chromatic scale. The deviation detecting means 13 first selects a pitch closest to the detected pitch sent from the plurality of reference pitches recorded in the reference pitch storing means 12, and then detects the detected pitch. When,
The deviation from the selected reference pitch is detected. As a result, the detected deviation is within the chromatic scale. Although the tuner 1 shown in FIG. 1 automatically selects a reference pitch according to the detected pitch, the practitioner previously specifies a desired reference pitch, and the specified reference pitch is set. The pitch may be a reference pitch according to the detected pitch.

The deviation detected by the deviation detection means 13 is sent to the notification control means 14. The notification control means 14
The deviation from the deviation detection means 13 is sent to the display means 15. As a result, the detected deviation is displayed on the display unit 15.

The metronome means 16 operates a predetermined operator in an operator group 18 which will be described in detail later,
A metronome sound (click sound) is generated for each beat of the set time signature according to the set tempo. The generated metronome sound is emitted from the speaker 17. Further, the metronome unit 16 outputs a start timing signal to both the pitch detection unit 11 and the notification control unit 14 immediately before the start of generation of the metronome sound, and outputs an end timing signal immediately after the end of generation of the metronome sound. To do. The pitch detecting means 11 stops the pitch detection when it receives the start timing signal, and restarts the pitch detection when it receives the end timing signal. Upon receiving the start timing signal, the notification control means 14 records the sent deviation in the deviation storage means 19, and continues to send the recorded deviation to the display means 15 until it receives the end timing signal. Therefore, the display means 15 displays the deviation while the metronome sound is muted while the metronome sound is being emitted.
Further, when the notification control means 14 receives the end timing signal, it sends the deviation sent thereafter to the display means 15, and sends the deviation sent sequentially to the display means 15 until the next start timing signal is received. to continue. Therefore, the deviation displayed on the display unit 15 is a deviation that is not affected by the metronome sound. In the tuner 1 shown in FIG. 1, the start timing signal and the end timing signal are output to both the pitch detection means 11 and the notification control means 14, but the pitch detection means 11 and the deviation detection means 1
3 and the notification control means 14 may be output. That is, when these timing signals are output only to the notification control means 14 among these three means 11, 13, 14, the notification control means 14
As described above, when the start timing signal is received, the sent deviation is recorded in the deviation storage means 19, and the recorded deviation is continuously sent to the display means 15 until the end timing signal is received. Good. Further, these timing signals are used for both of the two means 11 and 13 except the notification control means 14, or these two means 1.
When the deviation is sent to only one of the means 1 and 13, the notification control means 14 updates the sent deviation in the deviation storage means 19 each time the deviation is sent. The recorded deviation may be recorded, and the recorded deviation may be continuously sent to the display means 15 until the next deviation is sent.

Next, the hardware configuration of the tuner shown in FIG. 1 will be described with reference to FIG.

FIG. 2 is a hardware configuration diagram of the tuner shown in FIG.

The tuner 1 shown in FIG. 1 is a CPU 100 called a one-chip CPU built in one chip.
Is equipped with. The CPU 100 is provided with a D / A conversion function and the like in addition to an arithmetic processing function and a RAM.
And a built-in ROM, and the CPU100
Is an interrupt terminal (INT) or multiple I / O ports (POR)
T). The CPU 100 as described above executes various programs. Further, the tuner 1 shown in FIG. 1 includes a storage area of data referred to by a program executed by the CPU 100, a RAM 200 used as a work area of the program, and a ROM 300 storing various programs and data. Cage, CPU
100, RAM200, and ROM300 are mutually connected by the bus. The RAM 200 temporarily stores deviation data representing the detected deviation, and corresponds to the deviation storage means 19 shown in FIG. ROM3
In reference numeral 00, reference pitch data representing a plurality of reference pitches is recorded. Therefore, the ROM 300 corresponds to the reference pitch storage means 12 shown in FIG. It should be noted that instead of the RAM 200 and the ROM 300 shown in FIG.
You may use RAM and ROM built in.

The tuner 1 shown in FIG. 1 also includes a microphone 400 and a zero-cross detection circuit 500. The musical sound picked up by the microphone 400 is sent to the zero-cross detection circuit 500. Zero cross detection circuit 5
00 detects the zero cross point of the musical tone waveform, and CP
An interrupt signal is output every time a zero cross point is detected in U100. Whenever an interrupt occurs, the CPU 100 obtains the time from when the previous interrupt occurred,
The repetition cycle is obtained from this time change, more specifically, the autocorrelation, and the pitch of the input musical tone is detected from this value.

The tuner 1 shown in FIG. 1 further includes a meter drive circuit 600 and a speaker drive circuit 700. The CPU 100 also corresponds to the deviation detecting means 13 shown in FIG. 1, and detects the deviation between the detected pitch and the reference pitch. The CPU 100 also converts a digital signal representing the detected deviation into an analog signal by using the D / A conversion function, and outputs the analog signal from the D / A converter output to the meter drive circuit 600. The meter drive circuit 600 is
The display means 15 is driven based on the input analog signal. Therefore, the combination of the CPU 100 and the meter drive circuit 600 is the notification control means 14 shown in FIG.
Equivalent to. Further, the CPU 100 generates a burst signal representing a metronome sound and outputs it to the speaker drive circuit 700 from the output port. The speaker drive circuit 700 drives the speaker 17 based on the input burst signal. Therefore, the combination of the CPU 100 and the speaker drive circuit 700 corresponds to the metronome unit 16 shown in FIG.

Furthermore, the tuner 1 shown in FIG. 1 is equipped with an operation panel, on which the display means 1 is provided.
5, the microphone 400, the speaker 17, and the operator group 18 are provided, and a 7-segment LED 80 is provided.
0, a beat display LED 901 blinking in red, and a beat display LED 902 blinking in green are also provided.

FIG. 3 is a view showing an operation panel provided in the tuner shown in FIG.

The operation panel 10 shown in FIG. 3 includes a power switch 181, a set of tempo setting operators 182, a set of beat setting operators 183, a metronome operator 184, a tuner operator 185, and a display precision switching operation. Child 186
Has been deployed. The operator group 18 shown in FIG. 1 and FIG.
It is composed of these various operators 181 to 186. Further, the operation panel 10 is also provided with a tuner meter 151 corresponding to the display means 15 shown in FIGS. Further, as described above, the operation panel 10 has 7
Segment LED 800, 2 beat display LEDs 9
01, 902, the microphone 400, and the speaker 17 are also provided.

The tuner shown in FIG. 1 is a tuner node,
It has three modes: metronome mode and tuner mode with metronome. In the tuner mode, only the tuner functions, in the metronome mode, only the metronome functions, and in the tuner mode with the metronome, the metronome and the tuner of the present invention function at the same time. When the power is turned on, the mode, tempo, and time signature immediately before the power is turned off are set.

When the metronome operator 184 is pressed while the metronome mode is released, this tuner is set to the metronome mode, and further
When pressed once, the metronome mode is released again. When this tuner is set to the metronome mode, the speaker 17 produces a metronome sound for each beat of the set time signature according to the set tempo, and the two beat display LEDs 901 and 902 blink. To do. The tempo of the generated metronome sound is set by operating a pair of tempo setting operators 182. That is, the tempo of the metronome sound becomes faster by pressing the upper operator in FIG. 3 of the set of tempo setting operators 182, and conversely becomes slower by pressing the lower operator. The current setting value of the metronome sound is displayed on the 7-segment LED 800. The beat of the metronome sound to be generated is set by performing the same operation as the set of tempo setting operators 182 with the set of beat setting operators 183. 7 segment L
The display of the ED 800 is switched to a display of a value indicating a beat (for example, “4” for 4/4 time signature) when any one of the pair of beat setting control elements 183 is pressed, Thereafter, the 7-segment LED 800 displays the current set value according to the operation of the set of beat setting operators 183. Further, of the two beat display LEDs 901 and 902 that blink with the sound of the metronome sound, the beat display LED 901 that blinks in red blinks at the first beat of the time signature, and the beat display LED 902 that blinks in green.
Flashes on and after each second beat. For example, in the case of 4 beats, the beat display LED 901 first flashes in red.
Blinks once, then blinks green LED for beat display
902 blinks three times. The practitioner can feel a certain tempo by blinking these two beat display LEDs 901 and 902 in addition to the metronome sound.

When the tuner operator 185 is pressed while the tuner is set to the metronome mode, the tuner mode with the metronome is set. When the tuner operator 185 is pressed again, only the tuner mode of these two modes is selected. It will be canceled. When the metronome operator 184 is pressed while the tuner mode is selected, the tuner mode with the metronome is set. When the tuner mode with the metronome or the tuner mode is set, the tuner first selects a reference pitch according to the pitch of the musical sound picked up by the microphone 400, and the 7-segment LED 800 displays the pitch name of the reference pitch ( For example, 'A2b') is displayed, then the deviation between the pitch of the input musical tone and the selected reference pitch is detected, the deflection of the pointer of the tuner 151 is controlled according to the deviation value, and the deviation is displayed. To do. In displaying the detected deviation on the tuner 151, the tuner shown in FIG.
There are two display precisions, normal and fine. The display accuracy switching operator 186 is the tuner meter 15
This is an operator for switching the display accuracy of 1 between normal and fine. Here, the tuner meter 151 shown in FIG. 3 will be described in detail with reference to FIG.

FIG. 4 (a) is an enlarged view showing an example of a display panel of a tuner meter provided in a conventional tuner, and FIG. 4 (b) is provided in the tuner shown in FIG. It is a figure which expands and shows the display board of a tuner meter.

Some conventional tuners are provided with two display qualities, normal and fine. Figure 4
As shown in (a), the display panel of the tuner meter of the conventional tuner provided with two display accuracies has two kinds of scale display, that is, normal scale display and fine scale display. Each of the scale displays is a scale display in which the center is 0 cent. Normal scale display is +50
It is graduated evenly from 10 cents to -50 cents by 10 cents. Fine scale display is +2
It is graduated uniformly from 5 cents to -25 cents, with 5 cents each. Since the ends of these two scale displays are aligned with each other, the display precision of the fine scale display is higher than that of the normal scale display.

On the other hand, as shown in FIG. 4B, the display plate 1512 of the tuner meter 151 of the tuner shown in FIG.
Also, as in the conventional case, there are two kinds of graduation display, that is, normal graduation display and fine graduation display, and both graduation displays are graduated with the center at 0 cent. Of these scale displays, the normal scale display is
There is no difference from the conventional normal scale display.
On the other hand, the fine scale display is different from the conventional one.
It is a scale display between +50 cents and -50 cents. The fine scale display shown in FIG. 4 (b) is unevenly scaled so that the display accuracy becomes higher toward the center of 0 cents. The display accuracy is higher than that of the scale display near 0 cent.

Next, the operation of the tuner shown in FIG. 1 in switching the display accuracy will be described with reference to FIG.

FIG. 5 is a functional block diagram showing the operation of the tuner shown in FIG. 1 in switching the display accuracy.

The tuner 1 shown in FIG. 1 has a normal display conversion table 301, a fine display conversion table 302, and a conversion table switching means 1 for switching the display accuracy.
41 and D / A conversion means 142. Of these, the conversion table switching unit 141 and the D / A conversion unit 142 are included in the notification control unit 14 shown in FIG. The normal display conversion table 301 is a table for converting the value representing the deviation detected by the deviation detecting means 13 shown in FIG. 1 so as to match the normal scale display. On the other hand, the fine display conversion table 302
Is a table for converting the value representing the detected deviation so as to match the fine scale display. Both of these two conversion tables 301 and 302 are RO shown in FIG.
It is recorded in M300, and the CPU 100 converts the detected deviation using these two conversion tables 301 and 302. That is, the deviation detecting means 13 shown in FIG.
The value indicating the deviation output from the above is converted by the notification control means 14 into a value indicating the deviation for display using each of these two conversion tables 301 and 302. The values that represent the two types of display deviations that differ in display accuracy are
It is sent together to the conversion table switching means 141. From the display accuracy switching operator 186 shown in FIG.
A display precision switching signal for setting the display precision of the tuner 151 to either normal or fine is output to the conversion table switching means 141.
The conversion table switching means 141 sends to the D / A conversion means 142 only one of the values representing the two types of display deviations in response to the display accuracy switching signal. The D / A conversion means 142 converts the received value into an analog signal. Therefore, if the display accuracy is set to normal by operating the display accuracy switching operator 186,
The pointer 1511 of the tuner meter 151 shown in (4) uniformly shakes between −50 cents and +50 cents according to the detected deviation, and the tuner meter 151 displays the detected deviation. On the other hand, when the display accuracy is set to fine, the pointer 1511 of the tuner 151 swings with high accuracy around 0 cent depending on the detected deviation, and becomes +5.
As it approaches 0 or -50 cents, it swings less accurately,
The deviation detected by the tuner 151 is displayed.
As described above, in this tuner 1, one detected deviation is converted using the two conversion tables 301 and 302, and the value indicating the display deviation of either one is displayed on the tuner meter 151. It is not necessary to switch the detection accuracy during the detection of, and the normal display accuracy and the fine display accuracy can be switched by simple data processing.

As described above, since the tuner 1 shown in FIG. 1 can be set to the tuner mode with the metronome, the practitioner keeps a constant tempo by the metronome sound and keeps the constant value with the tuner meter. It is possible to check whether or not it is possible to continue to produce pitched notes. Moreover, the deviation between the pitch of the input musical tone and the reference pitch corresponding to the pitch is always accurately displayed on the tuner meter.

[0031]

As described above, according to the present invention, a tuner with a metronome can be provided which is suitable for the practice of continuously producing a sound of a constant pitch at a constant tempo.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an operation of a tuner according to an embodiment of the present invention.

FIG. 2 is a hardware configuration diagram of the tuner shown in FIG.

FIG. 3 is a diagram showing an operation panel provided in the tuner shown in FIG.

FIG. 4 is an enlarged view showing an example of a display panel of a tuner meter provided in a conventional tuner, and an enlarged view of a display panel of the tuner meter provided in the tuner shown in FIG. b).

5 is a functional block diagram showing an operation of the tuner shown in FIG. 1 in switching display accuracy.

[Explanation of symbols]

1 tuner 11 Pitch detection means 111 input terminal 12 Reference pitch storage means 13 Deviation detection means 14 Notification control means 141 conversion table switching means 142 D / A conversion means 400 microphone 15 Display means 151 tuner 1511 pointer 1512 display board 16 Metronome Means 17 speakers 18 Operator group 181 power switch 182 Tempo setting operator 183 Beat setting operator 184 Metronome Operator 185 Tuner control 186 Display precision switching operator 19 Deviation storage means 100 CPU 200 RAM 300 ROM 301 Normal display conversion table 302 Fine display conversion table 500 Zero-cross detection circuit 600 meter drive circuit 700 speaker drive circuit 800 7-segment LED 901,902 Beat display LED

Claims (2)

[Claims] 1. A detecting means for detecting a pitch of an inputted musical tone, a displaying means for displaying a deviation between the pitch detected by the detecting means and a predetermined reference pitch, and a display means for displaying a specified tempo. A metronome means for generating a metronome sound, and a control means for controlling the display means to display the deviation immediately before the generation of the metronome sound while the metronome means is generating the metronome sound. Tuner with a metronome. 2. The control means is control means for controlling the display means to display the deviation based on the pitch detected by the detecting means immediately before the metronome means starts generating a metronome sound. The tuner with a metronome according to claim 1.