JPS61289391A - Tuning apparatus with calibration function - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tuning device used for tuning voices and musical instrument sounds, with a calibration function that sets arbitrary tuning standards and performs tuning.

[Summary of the invention]

An object of the present invention is to make it possible to measure a tuned sound using a pinch of an arbitrary sound desired by a player of voice or musical instrument sound as a tuning standard, and furthermore, it is possible to measure a tuned sound by using a pinch of an arbitrary sound desired by a player of voice or musical instrument sound. Another purpose is to clearly indicate whether or not the pitch is used as the tuning standard to prevent the person performing the wrong tuning. The second storage means is provided with a first storage means for storing a deviation from a reference frequency and a second storage means for storing a calibration correction value. , a display device that displays the calculation result of the calculation control device, and a display device that notifies you that calibration is in progress. This has the effect of making it possible to tune the sound source based on the pitch of the sound source desired by the performer during an ensemble performance.

[Conventional technology]

In conventional tuners, the reference pitch for measuring the tuned tone is a frequency fixed to the tuner, typically Aa = 440 Hz. Also, As-440
One type of Hz (also A4-440Hz, 441Hz
, 442Hz, ---, 445Hz.

[Problem that the invention seeks to solve]

However, with conventional tuners, the standard pitch for measuring the tones to be tuned is fixed, making it difficult to tune a pitch that deviates from the fixed pitch.

For example, in the case of an ensemble performance between a piano and other instruments, which is difficult for even experienced tuning experts to tune in a short time, it is necessary to tune the other instruments using the pitch of the piano, which is difficult to tune, as a reference. At this time, with conventional tuners, the deviation of the piano sound from the fixed pitch of the tuner is first measured, and the person who tunes the other instruments memorizes this deviation, and then tunes the other instruments so that the deviation is the same. will be tuned. Then, if you do not accurately remember the deviation of the piano sound from the fixed pitch of the tuner, it will be tuned to the wrong pitch, and it is different from tuning a single instrument to the fixed pitch of the tuner. This method has the disadvantage of causing confusion for the tuner.

Therefore, in order to solve these conventional drawbacks, the present invention has the following features:
The purpose of the present invention is to obtain a tuning device that can measure and display a tuned sound by using a pinch of an arbitrary sound desired by a performer of voice or musical instrument sound as a tuning reference pitch.

[Means and operations for solving the problems] In order to solve the above problems, the present invention provides a switch means as an operation means for switching the pinch of an arbitrary sound to a reference pinch, and a switch means for measuring the pitch of an arbitrary sound. a second storage means for storing a correction value of and a first storage means for storing a deviation value calculated using a fixed reference pitch, and the value of the second storage circuit is calculated from the value of the first storage means. By providing an arithmetic control means with a subtraction function and a display device to notify the measurement results, the pinch of any note can be used as the standard for tuning.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, there is a waveform shaping circuit 2 that converts a signal under test A, which is an audio signal converted into an electrical signal by a microphone 1 etc., into a pulse signal B, and a waveform shaping circuit 2 that receives the pulse signal B and sends a signal to a counter 3 and an arithmetic control circuit 4. a reference signal generating circuit 6 which has a pulse control circuit 5 that provides a pulse control circuit 5 and generates a count clock signal for the counter 3; an external switch member 7 and a switch circuit 8 which generates a switch signal by opening and closing the external switch member 7; In the first storage circuit 9 that stores the deviation value and scale name based on the fixed pitch calculated from the count value output of the counter 3, the second storage circuit 10 that stores the correction value, and the calculation Mff1 circuit 4, the fixed pitch A third storage circuit 11 that stores a table used as a reference for calculating pitch-based scale names and deviation values, a first display device 12 that displays measurement results, and whether or not the calibration function is in operation. and a second display device 13 that clearly shows the information.

The waveform shaping circuit 2 converts the output signal waveform A of the microphone 1 into a pulse signal waveform B, as shown in FIG. 2, for example. The pulse control circuit 5 controls the counter 3 to count each rising interval of the pulse signal B, and outputs each rising timing to the arithmetic control circuit 4. Arithmetic control circuit 4
extracts the pinch of the pulse signal B from the count value t1゜'1+''Sr L4+ - . . . of each rising interval counted by the counter 3.

Extract as pitch. In the waveform example shown in Figure 2, 1
．． +1. For example, Table 1 shows the count values corresponding to each octave when the output signal of the reference signal generation circuit 6 is 400.4 KHz and the fixed reference pitch is A4''440 Hz. 1 is the data stored in the third storage circuit ll.Here, the extracted pitch L+ +t!-230 of the pulse signal in FIG.
Assuming that the count is 8, the arithmetic control circuit 4 calculates from the data shown in Table 1 that the signal to be measured is in octave n-3. Further, the third storage circuit 11 stores the count value of each scale master corresponding to one octave and the count value per cent deviation, as shown in Table 2. Now, since the calculated octave value is n=3, the count value equivalent to 1 octave is 2308x4
-9232. Then, according to the data stored in the third storage circuit 11, the scale base becomes F, and the deviation becomes (9172-9232) 15.25--11 cents. The pitch name and deviation value are stored in the first storage circuit 9, and further displayed on the first display device 12 as shown in FIG.

Here, when the external switch member 7 is operated and closed, the switch circuit 8 outputs a signal indicating that the external switch member 7 has been closed, for example, a high level signal, through arithmetic control. Output to circuit 4. Then, the arithmetic control circuit 5 executes according to the flowchart (1) shown in FIG. That is, when receiving the H4gh level signal from the switch circuit 8, it is determined whether the pitch name and the deviation value are being displayed on the first display device 12, and if yes, the arithmetic control circuit 4 The deviation value of the data stored in the first storage circuit 9 is transferred to the second storage circuit 10. That is,
Now, since the deviation value in the first storage circuit 9 is 111 cents, -11 cents is stored in the second storage circuit 10. The deviation value of the currently input signal under test A is calculated as -11-(-11)-0 cents, and as shown in FIG. Execute at. Here, the arithmetic control circuit 4 further includes a second display bag shown in FIG. By lighting up 13, it is clearly indicated that the calibration operation is in progress.

Now, suppose that during the calibration operation, the input signal A shown in FIG. 2 becomes a scale base F1 deviation value + 45 cents as measured at a fixed pinch A4 of 440 Hz. Then, the arithmetic control circuit 4 executes arithmetic operations according to the flowchart shown in FIG. 6, and first calculates the scale name and deviation value at the fixed pinch Aa-440Hz. Here, for example, F,
The second storage circuit 10 is calculated as +45 cents.
The correction value CAL--11 cents stored in is subtracted to obtain CENT' -+45- (-11)-+56. Therefore, in the zero example in which it is determined whether CENT' is smaller than -50 or larger than +50, +56>+50.

Then, the scale name is determined to be one semitone higher, and the deviation value is calculated as +56-100--44 cents. The second display device 12 displays the image as shown in FIG. Also, if CENT' is -50 or more and less than +50, the scale name and deviation value will not be corrected, and if CENT' is -50 or less, the scale name and deviation value will not be corrected.
If it is smaller, the scale name is lowered by one semitone, and the deviation value is (CE
NT' + 100). Due to this,
It is possible to display within the deviation range of 1 semitone ±50 cents, and it is possible to display the effective value based on calibration.

〔Effect of the invention〕

As explained above, the present invention includes an external switch member,
By providing a second memory circuit that stores correction values and an arithmetic control circuit that performs correction, it is possible to tune the sound to be measured at an arbitrary reference pitch.Furthermore, by providing a second display device, , it has the effect of clearly indicating that it is in a state where it can be tuned with any standard pinch.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram of a tuner with a calibration function according to the present invention, FIG. 2 is an example of an input signal A and an output signal B of a waveform shaping circuit, and FIG. 3 is a table before calibration operation. FIG. 5 and FIG. 7 are display examples obtained by the calibration operation, and FIGS. 4 and 6 are flowcharts for explaining the operation of the arithmetic control circuit during the calibration operation. l-...-Microphone 2--Waveform shaping circuit 3--Counter 4--Arithmetic control circuit 5--Pulse control circuit 6-- -...-Reference signal generation circuit 7...Switch member 8-1111-Switch circuit 9.10.11...Memory circuit 12.13...
...Display device and above Figure 6

Claims (3)

[Claims] (1) A tuner equipped with a display device that extracts the pitch of a sound to be tuned, such as a voice or an instrument sound, and displays the deviation of the extracted pitch from a reference frequency, and includes an external switch means for setting calibration, means for measuring the deviation of the tuned tone from a reference frequency; a first storage means for storing the deviation; and a second storage means to which the stored deviation data is transferred by operation of the external switch means.
After the operation of the external switch, the deviation data of the second storage means and the deviation of the new tuned tone from the reference frequency are measured and stored in the first storage means. A tuner with a calibration function, comprising: an arithmetic control means for subtracting data; and a display device for displaying the arithmetic results of the arithmetic control means. (2) When the arithmetic result is less than -50 cents, the arithmetic control circuit adds 100 cents to the arithmetic result and outputs data with the scale lowered by one semitone to the display device; when the arithmetic result is greater than +50 cents, A tuner with a calibration function according to claim 1, wherein data is output to a display device by subtracting 100 cents from the calculation result and raising the scale by one semitone. (3) A display device that clearly indicates that the calibration function is activated by operating an external switch means, and an arithmetic control circuit that controls lighting and extinguishing of the display device. A tuner with a calibration function as described in (1) and (2).