JPH06308946A - Tuning device - Google Patents

Abstract

PURPOSE:To improve the operability of a tuning work by setting a pitch of a deviation set previously for a reference pitch as a boundary for switching a display of a chord number. CONSTITUTION:An operating state of a display chord number selection switch 34 provided on a display panel 30 is read in, and in accordance with the operating state, a 'high mode' or a 'low mode' is set and stored. In such a way, in the case a pitch of an input signal inputted to an input part and detected is deviated from a deviation range, whether a chord number corresponding to a reference pitch being higher than a detected pitch is always selected and displayed, or a chord number corresponding to a reference pitch being lower than the detected pitch is always selected and displayed is set from the chord number corresponding to the reference pitch being adjacent to the detected pitch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuning device, and more particularly to a tuning device capable of displaying the string number of a string of a stringed instrument in accordance with the pitch of an input signal of the string of the stringed instrument to be tuned. Regarding the device.

[0002]

2. Description of the Related Art At present, as a tuning device for a stringed instrument, a tuning device has been proposed which detects the pitch of an input signal due to the string of a string and displays a preset string number in accordance with the detected pitch.

Generally, as a reference for switching the display of the string number in the above tuning device, the display of the string number is sequentially switched with the center pitch between the reference pitches intended for tuning each string as a boundary. It is possible.

For example, FIG. 7 shows each string (six strings) of a guitar.
The display mode of the string number is shown in the tuning device capable of tuning. That is, there is a deviation of 500 cents between the reference pitch of the sixth string and the reference pitch of the fifth string, and the center pitch of the deviation of 500 cents is set as the boundary A, and the input signal by the string of the string is input. If the pitch of the string is the pitch on the sixth string side, the string number "6" indicating the sixth string is displayed, and if the pitch of the input signal due to the striking of the string is the pitch on the fifth string side. , The string number "5" indicating the fifth string is displayed.

There is also a deviation of 500 cents between the reference pitch of the fifth string and the reference pitch of the fourth string.
If the pitch of the input signal due to the chord of the string is the pitch on the fifth string side, with the center pitch of the deviation of 0 cent as the boundary B, the string number "5" indicating the fifth string is displayed, and When the pitch of the input signal by the string is the pitch on the fourth string side, the string number "4" indicating the fourth string is displayed.

The display of the other string numbers is the same as above, but only the reference pitch of the third string and the reference pitch of the second string has a deviation of 400 cents from the relationship of the tuning of the guitar. Become.

[0007]

In the above-mentioned switching processing of the display of the string numbers, a large deviation from the reference pitch of each string (200 cents between the third and second strings and 250 cents between the other strings). The point of () is the boundary when the display of the string number is switched, and the display of the string number is switched with the same deviation width above and below the reference pitch.

For this reason, when the display of the string number is switched, the deviation from the reference pitch, which is the target of tuning, is still large, so the switching display of the string number, which is the most important information during tuning work, is displayed. However, it is not so meaningful, and there is a problem that the operability during tuning work is poor.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to set a pitch having a preset deviation with respect to a reference pitch as a chord number. It is intended to provide a tuning device in which the operability of tuning work is improved by giving a specific meaning to the switching of the display of the string number by setting the boundary for switching the display of.

[0010]

In order to achieve the above object, a tuning device according to the present invention detects a pitch of an input signal by a string of a stringed instrument, and displays a string number according to the detected pitch. If the detected pitch is within a preset deviation range with respect to the reference pitch of the string number, the string number corresponding to the reference pitch located within the deviation range is displayed and detected. If the detected pitch is outside the preset deviation range with respect to the reference pitch of the chord number, the chord number corresponding to the reference pitch adjacent to the detected pitch is higher than the detected pitch. The chord number corresponding to the reference pitch is always displayed, or the chord number corresponding to the reference pitch lower than the detected pitch is constantly displayed.

[0011]

When the pitch of the input signal due to the plucked string of the string instrument is detected, and the detected pitch is within a preset deviation range with respect to the reference pitch of the string number,
The chord number corresponding to the reference pitch located within the deviation range is displayed.

On the other hand, when the pitch of the input signal due to the plucked string of the stringed instrument is detected, if the detected pitch is out of the deviation range set in advance with respect to the reference pitch of the string number, it is detected. From the string numbers corresponding to the reference pitch adjacent to the selected pitch, the string numbers corresponding to the reference pitch higher or lower than the detected pitch are displayed in a unified manner.

Therefore, since the pitch of the deviation preset with respect to the reference pitch serves as a boundary for switching the display of the chord number, when the detected pitch is out of the deviation range, the adjacent high pitches are detected. It is possible to give a specific meaning to the switching of the display of the string number by always displaying the string number corresponding to the other reference pitch or always displaying the string number corresponding to the adjacent lower reference pitch. it can.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tuning device according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a tuning device according to the present invention. The tuning device controls the whole operation thereof by using a central processing unit (CPU) 10. It is configured.

The CPU 10 has a read-only memory (ROM) 14 in which a predetermined program for controlling the entire operation is stored via the bus 12, and various registers necessary for executing the program. Access as a working area including
A memory (RAM) 16, an operator group 18 to be described later, a display unit 20 to be described later, an input unit 22 for inputting a signal by a string of a stringed instrument, and a waveform of an input signal from the input unit 22 are displayed. A waveform shaping circuit 24 for shaping is connected. In addition, 1 count is 1 μse in the CPU 10.
It is assumed that the counter of c is set.

The operator group 18 is arranged on the display panel 30 of the tuning device shown in FIG. 2, and has a power switch 32 for controlling ON / OFF of the entire tuning device.
And the display string number selection switch 34 are set.

The display string number selection switch 34 has a deviation range W ₁ in which the pitch of the input signal input to the input section 22 and detected is preset with respect to the reference pitch of the string number.
To W ₆ (in the present embodiment, the reference pitch is set to ± 50 cents. That is, the deviation ranges W _{1 to} W
Each ₆ is 100 cents. ), The string number corresponding to the reference pitch higher than the detected pitch is always selected and displayed from the string numbers corresponding to the reference pitch adjacent to the detected pitch, or Alternatively, it is an operator capable of arbitrarily selecting whether to always select and display the string number corresponding to the reference pitch lower than the detected pitch. Then, when the "high mode" is set, the state where the string number corresponding to the reference pitch higher than the detected pitch is always selected and displayed is set, and when the "low mode" is set, The state in which the string number corresponding to the reference pitch lower than the detected pitch is always selected and displayed is set. Note that FIG. 2 shows a state in which the power switch 32 is turned on and the display string number selection switch 34 is set to the “high mode”.

The display section 20 is arranged on the display panel 30 of the tuning device shown in FIG. 2, and the string number display section 40 for displaying the string number and the deviation display section 42 for displaying the deviation from the reference pitch. And are provided. In FIG. 2, the string number display section 40 displays the string number “6” of the sixth string, and the deviation display section 42 displays the state where the deviation from the reference pitch is “0”.

The waveform shaping circuit 24 is a known circuit and generally includes a filter circuit, an amplification circuit, and a comparison circuit.

The operation of the tuning device having the above structure will be described step by step with reference to the flowcharts of FIGS. 3 and 4 and the operation examples of FIGS. 5 and 6.

In the flowchart showing the main routine in FIG. 3, the initialization routine of step S302 is started and executed when the power switch 32 is turned on. This is a routine for setting various buffers, registers, parameters, etc. used in the routine to initial values. Step S3
When the process of 02 is completed, the process proceeds to step S304.

Step S304 is a manipulator reading routine, which reads the operating state of the display string number selection switch 34 provided on the display panel 30, and sets "high mode" or "low mode" according to the operating state. Is a routine to be stored. As a result, the pitch of the input signal input to the input unit 22 and detected is within the deviation range W _{1 to} W _6.
, The string number corresponding to the reference pitch higher than the detected pitch is always selected and displayed from the string numbers corresponding to the reference pitch adjacent to the detected pitch. It will be set whether the string number corresponding to the reference pitch lower than the selected pitch is always selected and displayed. When the process of step S304 ends, the process proceeds to step S306.

Step S306 is a pitch extraction routine, which is a routine for extracting a pitch from an input signal of a string of a stringed instrument input from the input section 22 to obtain input pitch data of the input signal. Since this pitch extraction routine is a known technique, a detailed description thereof will be omitted, but the input signal input to the input unit 22 is first shaped into a rectangular wave by the waveform shaping circuit 24.
The rectangular wave after the waveform shaping is counted by the counter of the CPU 10 for how many microseconds one cycle time is between the rising edges or the falling edges of the rectangular wave. C
Since the count of the counter of the PU 10 is 1 μsec, the pitch data is set from the counted data of one cycle time. When the process of step S306 ends, the process proceeds to step S308.

Step S308 is a string number acquisition routine, which searches for a string number based on the input pitch data obtained in step S306 and acquires the string number to be displayed. Note that this string number acquisition routine will be described later in detail with reference to FIG. When the process of step S308 ends, the process proceeds to step S310.

Step S310 is a display routine in which the string number acquired in step S308 is displayed on the display unit 2.
It is displayed on the string number display section 40 of 0. Also,
When the input pitch data is within the deviation range W _{1 to} W ₆ , the deviation from the reference pitch is displayed by driving the pointer of the deviation display unit 42 based on a known technique. When the process of step S310 ends, this main routine ends.

Next, the string number acquisition processing, which is the subject matter of the present invention, will be described in detail based on the string number acquisition routine shown in FIG. In this string number acquisition routine, the string number is acquired from the input pitch data obtained by the pitch extraction routine of step S306, and the acquired string number is displayed by the display routine of step S310.

First, in step S402, from the input pitch data, the chord number STR_L corresponding to the adjacent reference pitch lower than the input pitch indicated by the input pitch data and the input pitch indicated by the input pitch data. Obtain the string number STR_H corresponding to the higher adjacent reference pitch. For example, when the input pitch is a pitch between the reference pitch of the third string and the reference pitch of the fourth string, the string number STR_L becomes the string number “4” of the fourth string, and the string number STR_H becomes the third string. The string number of the string is "3".

When the input pitch is lower than the reference pitch of the sixth string, the string number STR_L and the string number STR_H
Is obtained as the string number "6" of the sixth string, and if the input pitch is higher than the reference pitch of the first string, the string number STR
_L and the string number STR_H are set so as to be acquired as the string number “1” of the first string.

When the process of step S402 is completed, the process proceeds to step S404, where the input pitch is the string number STR_
It is determined whether or not it is within a deviation range of “± 50 cents” (deviation range W _{1 to} W ₆ ) from the reference pitch corresponding to L or the string number STR_H.

If the determination result of step S404 is affirmative (Y), that is, if the input pitch is within the deviation range W _{1 to} W _{6 of} the string number STR_L or the string number STR_H, the process proceeds to step S406 and the string number STR_L and From the string number STR_H, the _one within the deviation range (deviation range W _{1 to} W ₆ ) of the input pitch from the reference pitch is acquired as the string number, the string number acquisition routine is terminated, and the main routine is ended. Return to.

Therefore, for example, the input pitch is the reference pitch of the third string (string number STR_H: 3) and the fourth string (string number S).
TR_L: a pitch between the reference pitch of 4),
The input pitch third string (string number STR_H: 3) If it is within the reference pitch deviation range W ₃ of the "3" (string number STR_H) is obtained as a string number.

On the other hand, if the determination result in step S404 is negative (N), that is, if the input pitch is out of the deviation range W _{1 to} W _{6 of} the string number STR_L or the string number STR_H, the process proceeds to step S408 and is displayed. It is determined whether or not the "high mode" is set by the string number selection switch 34.

If the determination result of step S408 is affirmative, that is, if the "high mode" is set by the display string number selection switch 34, the process proceeds to step S410, the string number STR_H is acquired as the string number, and the string number is obtained. Exit the acquisition routine and return to the main routine.

Accordingly, for example, when the "high mode" is set by the display string number selection switch 34, the input pitch is the reference pitch of the third string (string number STR_H: 3) and the fourth string (string number STR_L). : 4) and the input pitch is the deviation range W ₃ of the reference pitch of the third string (string number STR_H: 3).
If it is out of the deviation range W ₄ of the reference pitch of the fourth string (string number STR_L: 4), “3” (string number STR_H) is acquired as the string number.

On the other hand, if the result of the determination in step S408 is negative, that is, if the display string number selection switch 34 is set to the "low mode", the flow advances to step S412 to acquire the string number STR_L as the string number, The string number acquisition routine is terminated and the process returns to the main routine.

Therefore, for example, when the "low mode" is set by the display string number selection switch 34, the input pitch is the reference pitch of the third string (string number STR_H: 3) and the fourth string (string number STR_L). : 4) and the input pitch is the deviation range W ₃ of the reference pitch of the third string (string number STR_H: 3).
And fourth string (string number STR_L: 4) If deviates from deviation range W ₄ of the reference pitch, "4" (string number STR_L) is obtained as a string number.

Next, the operation of the tuning device of the present invention will be described with reference to the operation examples shown in FIGS.

FIG. 5 shows the display state of the string numbers when the display string number selection switch 34 is set to the "high mode". That is, if the input pitch is within _one of the deviation ranges W _{1 to} W ₆ of the reference pitch of each string number, the deviation range W in which the input pitch is located.
The chord numbers of the reference pitch within _{1 to} W ₆ are acquired and displayed (step S402 → step S404 → step S406 → step S310).

However, when the input pitch is out of any of the deviation ranges W _{1 to} W ₆ of the reference pitch of each string number, the strings corresponding to the adjacent reference pitch higher than the input pitch are associated. The number is acquired and displayed (step S402 → step S404 → step S408 → step S410 → step S310).

For example, the input pitch is a pitch between the reference pitch of the fourth string and the reference pitch of the fifth string, and the input pitch is the deviation range W ₄ of the reference pitch of the fourth string and the reference pitch of the fifth string. If it is outside the deviation range W ₅ of the reference pitch, the string number “4” of the fourth string is acquired as the string number.

Therefore, when performing a work process of first performing a rough tuning and then minimizing a deviation from the reference pitch, such as a tuning work for restringing a string, a considerably low pitch state is required. Tuning will be performed in the direction of raising the pitch, but by obtaining and displaying the string number that is always higher than the current pitch, the tuning will change from the low pitch state to the target string number. It is easy to check whether or not it is being performed, and the operability during tuning work is improved.

FIG. 6 shows the display state of the string numbers when the display string number selection switch 34 is set to the "low mode". That is, if the input pitch is within _one of the deviation ranges W _{1 to} W ₆ of the reference pitch of each string number, the deviation range W in which the input pitch is located.
The chord numbers of the reference pitch within _{1 to} W ₆ are acquired and displayed (step S402 → step S404 → step S406 → step S310).

However, when the input pitch is out of any of the deviation ranges W _{1 to} W ₆ of the reference pitch of each string number, the strings corresponding to the adjacent reference pitches lower than the input pitch are concerned. The number is acquired and displayed (step S402 → step S404 → step S408 → step S412 → step S310).

For example, the input pitch is a pitch between the reference pitch of the fourth string and the reference pitch of the fifth string, and the input pitch is the deviation range W ₄ of the reference pitch of the fourth string and the reference pitch of the fifth string. If it is out of the deviation range W ₅ of the reference pitch, the string number “5” of the fifth string is acquired as the string number.

Therefore, when performing a work process of first performing a rough tuning and then minimizing the deviation from the reference pitch, such as a tuning work for restringing a string, a considerably low pitch condition is applied. Tuning will be performed in the direction of increasing pitch.However, by obtaining and displaying the string number that is always lower than the current pitch, the pitch (deviation range) close to the reference pitch of the target string number. Whether or not the pitch is within W _{1 to} W ₆ ) can be confirmed by switching the display of the string number to the string number of the target reference pitch, so that the operability during tuning work is improved.

In the present embodiment, any one of the above-mentioned tuning methods can be selected depending on the usability of the tuning operator, and the tuning method can be given a margin.

In the above embodiment, the display string number selection switch 34 is used to select either "high mode" or "low mode", but the display string number is not limited to this. Instead of providing the selection switch 34, either one of the “high mode” and the “low mode” may be set in advance in the tuning device.

[0049]

Since the present invention is constructed as described above, it has the following effects.

In a tuning device that detects the pitch of an input signal due to a stringed string of a stringed instrument and displays the string number according to the detected pitch, the detected pitch is preset with respect to the reference pitch of the string number. If it is within the deviation range, the chord number corresponding to the reference pitch located within the deviation range is displayed, and the detected pitch deviates from the preset deviation range with respect to the reference pitch of the chord number. If it is, the chord number corresponding to the reference pitch higher than the detected pitch is always displayed from the chord number corresponding to the reference pitch adjacent to the detected pitch, or
Alternatively, since the string number corresponding to the reference pitch lower than the detected pitch is always displayed, the pitch of the deviation preset with respect to the reference pitch becomes the boundary for switching the display of the string number. Therefore, when the detected pitch is out of the deviation range, depending on whether the string number corresponding to the higher reference pitch or the string number corresponding to the lower reference pitch is always displayed, Switching the display of the string number can have a specific meaning.

Therefore, according to the tuning device of the present invention, the pitch of the deviation set in advance with respect to the reference pitch is used as the boundary for switching the display of the string number, thereby specifying the switching of the display of the string number. Since it has the meaning of, the operability during tuning work can be significantly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a tuning device according to the present invention.

FIG. 2 is an explanatory diagram showing an example of a display panel of the tuning device.

FIG. 3 is a flowchart of a main routine.

FIG. 4 is a flowchart of a string number acquisition routine.

FIG. 5 is an explanatory diagram showing a display mode of the string numbers when the “high mode” is selected by the display string number selection switch.

FIG. 6 is an explanatory diagram showing a display mode of string numbers when the “low mode” is selected by the display string number selection switch.

FIG. 7 is an explanatory diagram showing a conventional display mode of string numbers.

[Explanation of symbols]

 10 CPU 12 Bus 14 ROM 16 RAM 18 Operator group 20 Display section 22 Input section 24 Waveform shaping circuit 30 Display panel 32 Power switch 34 Display string number selection switch 40 String number display section 42 Deviation display section

Claims (3)

[Claims] 1. A tuning device for detecting a pitch of an input signal of a string of a stringed instrument and displaying a string number in accordance with the detected pitch, wherein the detected pitch is preset with respect to a reference pitch of the string number. If it is within the set deviation range, the chord number corresponding to the reference pitch located within the deviation range is displayed, and if the detected pitch is outside the deviation range, the detected pitch is displayed. A tuning device characterized by constantly selecting and displaying a string number corresponding to a reference pitch higher than the detected pitch from string numbers corresponding to adjacent reference pitches. 2. A tuning device for detecting a pitch of an input signal of a stringed string of a stringed instrument and displaying a string number according to the detected pitch, wherein the detected pitch is preset with respect to a reference pitch of the string number. If it is within the set deviation range, the chord number corresponding to the reference pitch located within the deviation range is displayed, and if the detected pitch is outside the deviation range, the detected pitch is displayed. On the other hand, a tuning device which constantly selects and displays a string number corresponding to a reference pitch lower than the detected pitch from string numbers corresponding to adjacent reference pitches. 3. A tuning device for detecting a pitch of an input signal of a string of a stringed instrument and displaying a string number in accordance with the detected pitch, wherein the detected pitch is preset with respect to a reference pitch of the string number. If the deviation is out of the set deviation range, always select the string number corresponding to the reference pitch higher than the detected pitch from the string numbers corresponding to the reference pitch adjacent to the detected pitch. Equipped with a selection unit that allows you to select whether to display or to always select and display the chord number corresponding to the reference pitch lower than the detected pitch. When the detected pitch is outside the deviation range, the chord number corresponding to the reference pitch located within the deviation range is displayed when the deviation is within the deviation range set in advance. In this case, the tuning device displays the string number based on the selection made by the selecting means.