JP2585234Y2 - Tuner - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuning device used for tuning a musical instrument.

[0002]

2. Description of the Related Art FIG. 4 shows an outline of a conventional tuner. In the figure, reference numeral 1 denotes a microphone, and 2 denotes an amplifier for amplifying a signal of a sound captured by the microphone 1. The tone signal amplified by the amplifier 2 is input to the fundamental wave extracting means 3, and a signal having the longest period among signals included in the tone signal is extracted. That is, the cycle of the signal having the longest cycle is extracted as the basic cycle.

The basic period extracted by the basic period extracting unit 4 is normalized by the normalizing unit 4, and the normalized basic period is given to the pitch error detecting unit 5. The pitch error detecting unit 5 outputs the pitch error value (cent value). obtain. This pitch error value is given to the display control means 6, and the pitch display means 7 displays the pitch error value (cent value) of the input sound. Here, the function of the normalizing means 4 will be described. For example, the frequency of the tone A, which is a reference, is set to 438 Hz, 440 Hz, or 442 Hz or 444 Hz.
It has a function that can select whether to take it. In the figure, reference numeral 8 denotes a reference pitch selection switch group for inputting which frequency is to be selected, and reference numeral 9 denotes a reference pitch constant memory for outputting a reference pitch constant corresponding to the selected frequency. The reference pitch memory 9 stores a reference pitch constant when the reference frequency is 438 Hz, a reference pitch constant when the reference frequency is 440 Hz, a reference pitch constant when the reference frequency is 442 Hz, and 444 Hz. The reference pitch constant of the specified frequency is stored. When the frequency is designated by the selection switch group 8, the reference pitch constant of the designated frequency is read out, and this reference pitch constant is given to the normalizing means 4. , The basic period extracted by the basic period extracting means 3 is normalized. That is, the basic period is normalized by dividing by the reference pitch constant, and the pitch error value (cent value) is set to 0 cent for each reference frequency and ± 50 cents when any reference frequency of 438 to 444 Hz is selected. Are matched. 1
Reference numeral 1 denotes frequency display means for displaying which frequency is currently selected as the reference frequency. The reference period extracting means 3, the normalizing means 4, the pitch error detecting means 5, the display control means 6, and the reference pitch constant memory 9 can be constituted by a microcomputer CPU.

[0004] The above description has been given of the configuration in which the reference frequency is manually selected. However, there is a tuner having a function of setting the frequency of the input sound to the reference pitch. This function is called reference calibration. Reference numeral 12 denotes a reference calibration start switch for executing the reference calibration. When the reference calibration start switch 12 is turned on while a tone is being given to the microphone 1, the reference calibration program is started and the reference calibration mode is set. In this mode, the basic period extracting means 3
A reference path constant corresponding to the basic period data supplied from the basic period extracting means 3 is read from the reference pitch constant memory 9. This reference pitch constant is used as the normalizing means 4
And the reference calibration operation ends.

[0005]

SUMMARY OF THE INVENTION In the conventional reference calibration operation, there is no means for indicating that the frequency of the input sound has been set to the reference frequency by the reference calibration. For this reason, the user re-enters the sound input in the reference calibration mode, and confirms that the input sound has been set to the reference frequency by indicating 0 cents on the display. For this reason, there is a disadvantage that the usability is poor.

An object of the present invention is to provide a tuner capable of displaying that the reference frequency of the tuner has been set to the frequency of the input sound at the end of the reference calibration.

[0007]

According to the present invention, a reference calibration can be performed by operating a reference calibration start switch in a state where a musical sound is being input, so that the frequency of the input sound can be set to a reference frequency. In a tuner equipped with a function, immediately after operating the reference calibration start switch, the cent value of the sound being input (the reference frequency is set to 440H)
initial pitch fixing means for displaying the cent value when z is displayed, canceling means for canceling the operation of the initial pitch fixing means after displaying the cent value and displaying 0 cent, and displaying the frequency set by the reference calibration. Frequency display means.

According to the structure of the present invention, first, the cent value of the input sound is displayed, then 0 cent is displayed, and finally the set frequency is displayed. Further, the light emitting element for displaying the frequency can be turned on and off as needed.
By this series of movements, it can be confirmed that the reference calibration has been executed. Therefore, it is possible to provide a tuning device with a good feeling of use.

[0009]

1 shows the configuration of a tuner according to the present invention.
In the present invention, the initial pitch fixing means 13 activated by turning on the reference calibration activation switch 12 and the operation of the initial pitch fixing means 13 are released after a predetermined time and extracted by the basic period extracting means 3. The structure has a release means 14 for providing the basic period data to the reference pitch memory 9 and a frequency display means 7 for displaying the frequency set by the reference calibration.

When the reference calibration start switch 12 is turned on, the initial pitch fixing means 13 executes an operation of reading a reference pitch constant of 440 Hz, which is generally used as a reference frequency, from the reference pitch constant memory 9. The reference pitch constant of 440 Hz read from the reference pitch constant memory 9 is supplied to the normalizing means 4 to normalize the basic period of the sound input from the microphone 1 with the period of 440 Hz. The normalized data is converted into a pitch error, that is, a cent value by the pitch error detecting means 5, and a cent value of the input sound having a reference pitch of 440 Hz is displayed on the pitch display means 7 through the display control means 6. 2A and 3A show the state. The figure shows a case where the input sound is 442 Hz. FIG. 2 shows a case of a display using a light emitting element, and FIG. 3 shows a case of a display using a mechanical meter.

The reference calibration display control means 15 controls the pitch display means 7 while displaying the cent value.
Is blinked (FIG. 2B), or in the case of a mechanical meter, the cent display state is stopped, for example, for one second as shown in FIG. 3B. After terminating the control of the reference calibration display control means 15, the canceling means 14 cancels the operation of the initial pitch fixing means 13 and supplies the basic pitch data extracted by the basic cycle extracting means 3 to the reference pitch constant memory 9. As a result, the reference pitch constant memory 9 reads out the 442 Hz reference pitch constant corresponding to the basic period data from the basic period data, and supplies the reference pitch constant to the normalizing means 4. Therefore, the normalizing means 4 normalizes the fundamental period data of the sound having the frequency of 442 Hz with the reference pitch constant having the same frequency of 442 Hz.
Outputs 0 cents as an error value. Accordingly, the pitch display means 7 gradually moves the indicated value to the 0 cent position as shown in FIG. 2C or 3C, and finally indicates the 0 cent position as shown in FIG. 2D or 3D. Here, in the case of the display means using the light emitting element, the display control means 15 causes the display of the pitch display means 7 to blink as shown in FIG. 2E. At the same time, the display control means 15 controls the frequency display means 11,
From the basic period extracted by the basic period extracting unit 3, the frequency of the input sound is displayed on the frequency display unit 11 (FIG. 2F or 3E), and the display is blinked.

By confirming the above series of display operations, it is possible to know that the reference calibration has been executed and whether the reference frequency has been set to a frequency of 442 Hz in this example.

[0013]

As described above, according to the present invention, it is possible to know that the reference calibration has been executed. The frequency of the sound used for reference calibration (set reference frequency)
Therefore, there is also obtained an advantage that it is possible to easily tune the sounds of various musical instruments, and it is possible to provide a tuning device with a good feeling of use.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the present invention.

FIG. 3 is a diagram for explaining the operation of the present invention.

FIG. 4 is a block diagram for explaining a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microphone 2 Amplifier 3 Basic period extraction means 4 Normalization means 5 Pitch error detection means 6 Display control means 7 Pitch display means 8 Reference pitch selection switch group 9 Reference pitch constant memory 11 Frequency display means 12 Reference calibration start switch 13 Initial pitch Fixing means 14 Release means 15 Reference calibration display control means

Claims (1)

(57) [Scope of request for utility model registration] 1. A. First Embodiment B. A tuner provided with a reference calibration function capable of setting the frequency of a sound being input to a reference frequency by operating a reference calibration start switch while a tone signal is being input; B. initial pitch fixing means for displaying the cent value of the sound being input immediately after operating the reference calibration start switch; After the cent value is displayed, the operation of the initial pitch fixing means is released, the basic cycle data extracted by the basic cycle extracting means is given to the reference pitch constant memory, and the reference pitch corresponding to the frequency of the sound currently input from the reference pitch memory C. reading a constant, setting the reference pitch constant in the normalizing means, and displaying 0 cents on the pitch display means; A frequency display means for displaying a frequency set by the reference calibration.