JP2015031909A - Guitar tuner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effect octave display when a pitch which is higher by one octave than an open string pitch is detected and also enable tuning of higher accuracy in that case.SOLUTION: A guitar tuner 100 includes: an input unit 10; a pitch detection unit 20; a string number, note and octave discrimination unit 30 for discriminating a string number, a note, and an octave from and a pitch of an input sound; a string number, note, octave display unit 72; a string number, note, octave display control unit 60; a pitch deviation calculation unit 40; a pitch deviation display unit 71; and a pitch deviation display control unit 50. The pitch deviation display unit 71 displays a pitch deviation by selective lighting of a segment. When the pitch of an input sound is determined to be one octave higher than the pitch of the open string, the pitch deviation display control unit 50 narrows the range of the pitch deviation for which only the segment indicating the pitch deviation of 0 is illuminated relative to when the pitch is not one octave higher.

Description

  The present invention relates to a guitar tuner used for tuning a guitar or a bass (bass guitar).

  A tuner (tuner) that detects the pitch (pitch) of an input instrument sound and obtains and displays the pitch deviation of the detected pitch with respect to a reference pitch has been conventionally used. A conventional guitar tuner includes a string number display unit that displays a string number of a string being tuned and a deviation display unit that displays a pitch deviation as display units (for example, Patent Documents). 1).

JP-A-6-308946

  As described above, the tuner for guitar displays the string number and pitch deviation, and there is also the one that displays the string number and notes (scale name) together as the display of the string being tuned. .

Normally, when A4 = 440Hz, the frequency when playing the open string of the guitar is from low (6 string E note) to high (1 string E note)
82.41Hz / 110.00Hz / 146.83Hz / 196.00Hz / 246.94Hz / 329.63Hz
In the guitar tuner that displays the string number and notes, based on the detected frequency,
6E / 5A / 4D / 3G / 2B / 1E
Is displayed.

In addition, when A4 = 440 Hz, the frequency when playing the open string of the bass is from low (4 string E sound) to high (1 string G sound)
41.20Hz / 55.00Hz / 73.42Hz / 98.00Hz
The base tuner is based on the detected frequency,
4E / 3A / 2D / 1G
Is displayed.

  By the way, many of the tuners for guitars and basses also support tuning with so-called harmonics, so the same display is performed even when a frequency one octave higher than the frequency corresponding to each string is detected. In other words, even when the detected pitch is one octave higher than the pitch of the open string, the same string number and note are displayed.

However, in the case of such a display method, for example, if the sound is raised from a low tone when the guitar string is changed, the string number and note display are
6E → 5A → 4D → 6E → 3G → 5A → 2B → 4D → 1E
Similarly, when changing the string of the base, the string number and note display are
4E → 3A → 2D → 4E → 1G
In other words, there is a situation in which the string number and note that are different from the string being tuned are displayed without being switched in order from the note with the lowest string number or note. For this reason, the display is difficult to understand for beginners, which causes confusion.

On the other hand, the sound produced by playing the string while holding down the 12th fret strongly (the sound of the 12th fret), the sound produced by playing the string while holding the string lightly on the 12th fret (harmonic sound) In octave tuning to match
・ If the actual sound of the 12th fret is lower than the harmonic sound, adjust the bridge and shorten the string length to match the actual sound of the 12th fret to the harmonic sound.
・ If the 12th fret actual sound is higher than the harmonicis sound, adjust the bridge to make the string length longer so that the 12th fret actual sound matches the harmonic sound.
However, in such octave tuning, the tuner requires higher display accuracy (center indication accuracy) than open string tuning.

  In view of such a situation, the object of the present invention is to display when a pitch one octave higher than the pitch of the open string is detected, and to tune with higher accuracy when it is determined that the pitch is one octave higher. It is to provide a guitar tuner that can perform the above.

  According to the first aspect of the present invention, the guitar tuner used for tuning the guitar is detected by the input unit that captures the input sound, the pitch detection unit that detects the pitch of the input sound captured by the input unit, and the pitch detection unit. The string number / note / octave discriminating section for discriminating the string number, note and octave from the pitch of the input sound, the string number / note / octave display section for displaying the string number, note and octave, the string number, note and octave A string number, note, octave display control unit, a pitch deviation calculation unit for calculating a pitch deviation of the pitch with respect to a reference pitch determined from the note and octave, and a plurality of segments, Pitch deviation display section that displays pitch deviation by selective lighting of segment and pitch deviation display And a pitch deviation display control unit that displays a pitch deviation of 0 when the string number / note / octave discrimination unit determines that the pitch is one octave higher than the pitch of the open string. The range of the pitch deviation that only lights up is narrower than when the string number / note / octave discriminating part is not discriminated as being one octave higher.

In the invention of claim 2, in the invention of claim 1, the range when the string number / note / octave discriminating portion is not discriminated as being one octave higher is ± 2 cents, and the range when it is discriminated as being one octave higher Is ± 0.1 cents.
In the invention of claim 3, in the invention of claim 1 or 2, the segment is formed of a light emitting diode.

According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the segment is composed of a liquid crystal display element.
According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, an instrument selection switch for selecting an instrument to be tuned is provided.

  According to the present invention, when a pitch one octave higher than the pitch of the open string is detected, the string number and note are displayed together with the octave display. Therefore, for example, when raising the string from low to high when changing strings, the display is switched in order from the low string number and the note, so that even beginners can easily understand and do not cause confusion.

  In addition, when a pitch one octave higher than the pitch of the open string is detected, the range of the pitch deviation for lighting only the segment displaying the pitch deviation 0 is narrowed, that is, the accuracy of the center indication is increased. Octave tuning can be performed with high accuracy.

The block diagram which shows the function structure of one Example of the guitar tuner by this invention. The figure which shows the example of a display of the display part of the guitar tuner shown in FIG.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a functional configuration of an embodiment of a guitar tuner according to the present invention. The guitar tuner 100 includes an input unit 10, a pitch detection unit 20, a string number / note / octave discrimination unit 30, a pitch deviation calculation unit 40, a pitch deviation display control unit 50, a string number / note / octave display control unit 60, and a display unit. 70 and a musical instrument selection switch 80 are provided. The display unit 70 includes a pitch deviation display unit 71 and a string number / note / octave display unit 72. The guitar tuner 100 can tune both guitar and bass.

  An instrument to be tuned, that is, a guitar or a bass (bass guitar) is selected by operating the instrument selection switch 80.

  The input unit 10 captures an input sound (guitar sound or bass sound) and outputs the captured input sound as an electrical signal. The input unit 10 captures input sound from a built-in microphone or an external microphone.

  The pitch detector 20 detects the pitch of the input sound captured by the input unit 10. The string number / note / octave discrimination unit 30 discriminates the string number, note, and octave from the input information from the instrument selection switch 80 and the pitch of the input sound detected by the pitch detection unit 20. This determination is made by comparing the pitch of each open string and a pitch one octave higher than that pitch with the pitch of the input sound, determining the pitch closest to the pitch of the input sound, and corresponding notes and strings corresponding to that pitch. This is done by identifying the number. The string number / note / octave display control unit 60 causes the string number / note / octave display unit 72 to display the determined string number, note, octave and guitar or bass.

  The pitch deviation calculator 50 calculates the pitch deviation of the pitch of the input sound with respect to the reference pitch determined from the note and octave discriminated by the string number / note / octave discriminator 30. The pitch deviation display control unit 50 causes the pitch deviation display unit 71 to display the calculated pitch deviation.

  FIG. 2 shows a display example of the display unit 70. The display unit 70 including the pitch deviation display unit 71 and the string number / note / octave display unit 72 has the configuration shown in FIG. 2 in this example. It is supposed to be.

  The pitch deviation display unit 71 is composed of 11 segments arranged in an arc shape. The display range of the pitch deviation is -50 cents to +50 cents, and the center segment displays 0 pitch deviations. Under this center segment, “0” indicating a pitch deviation of 0 and a triangle mark “▲” are displayed. The segment is constituted by a light emitting diode (LED), and the pitch deviation is displayed by selective lighting of the segment.

  The string number / note / octave display unit 72 has six segments arranged in two upper and lower stages, and, like the pitch deviation display unit 71, is composed of light emitting diodes. Below the segment 72a in the lower row, "6E", "5A", "4D", "3G", "2B", and "1E" are displayed in order from the left, and on the left side of "6E" “GUITAR” indicating a guitar is displayed. Further, “BASS” indicating the base, “4E”, “3A”, “2D”, and “1G” indicating the base string number and notes are displayed below these displays. Further, “OPEN” indicating an open string is displayed on the left side of the lower segment 72a, and “12f” indicating that it is one octave higher is displayed on the left side of the upper segment 72b. In this example, segments 72c and 72d made of light emitting diodes are also arranged on the left side of the display of “GUITAR” and “BASS”. Whether a string number, a note, an octave, and a guitar are selected or whether a bass is selected is displayed by selecting and lighting a segment.

  FIG. 2A shows a display state when a sound of an open string (4 string D sound) of the guitar is input and the pitch deviation is 0, and a black-painted segment in the figure indicates a lighting state. A segment indicating a guitar, a segment indicating a pitch deviation of 0, and a segment indicating an open string of 4-string D sound are lit.

  On the other hand, FIG. 2B shows a display state when a sound when a string is played by pressing the 12th fret (12f) of the 4th string of the guitar and the pitch deviation is 0 is shown. A segment indicating deviation 0 and a segment indicating octave of 4-string D sound are lit.

  Thus, the string number, note, and octave determined by the string number / note / octave determination unit 30 are displayed on the string number / note / octave display unit 72, and the pitch deviation calculated by the pitch deviation calculation unit 40 is It is displayed on the pitch deviation display unit 71.

The pitch deviation display control unit 50 displays the pitch deviation on the pitch deviation display unit 71. At this time, the string number / note / octave discriminating unit 30 discriminates that the pitch of the input sound is one octave higher than the pitch of the open string. (Octave tuning mode) and when the pitch of the input sound is one octave higher than the pitch of the open string, when the string number / note / octave discriminator 30 does not detect (open string tuning mode), the pitch deviation is displayed as 0 In the octave tuning mode, the pitch deviation range for lighting only the segment displaying the pitch deviation 0 is narrowed in the octave tuning mode. For example, the pitch deviation range in which only the segment displaying the pitch deviation 0 is lit is as follows.
• Open string tuning mode: ± 2 cents • Octave tuning mode: ± 0.1 cents. In octave tuning mode, display accuracy (center indication accuracy) is increased.

  When performing octave tuning for guitar or bass tuning, higher accuracy is required than for open strings. In this example, this requirement is achieved by increasing the accuracy of the center indication in the octave tuning mode as described above. It can be answered. Furthermore, not only octave tuning but also tuning with higher accuracy can be performed when tuning is performed with harmonics.

  In the octave tuning mode, the range of the pitch deviation for lighting only the segment displaying the pitch deviation 0 is ± 0.1 cent in the above, but is not limited to this. For example, ± 0.2 cent or ± 0.2 cent It may be 0.3 cents. Further, the range of the pitch deviation for lighting only the segment displaying the pitch deviation 0 in the open string tuning mode may be ± 3 cents, for example. In the octave tuning mode, the pitch deviation range in which only the segment displaying the pitch deviation 0 is lit is preferably within ± 0.5 cents in order to increase the accuracy of the center indication as compared to the open string tuning mode. Note that the entire display range (± 50 cents) of the pitch deviation is the same in both the open string tuning mode and the octave tube mode in this example.

  Although the embodiment of the present invention has been described above, according to the guitar tuner described above, when a pitch one octave higher than the pitch of the open string is detected, the string number and note are displayed together with the octave display. It has become. Therefore, for example, when raising the string from low to high when changing strings, the display is switched in order from the low-pitched string number and the note, making it easy for beginners to understand and use.

  Further, in the octave tuning mode, since the display accuracy of the pitch deviation 0 is increased, more accurate tuning can be performed.

  In the above-described embodiment, the segment of the display unit 70 is configured by a light emitting diode. However, the present invention is not limited to this. For example, the segment may be configured by a liquid crystal display element.

  The above-described guitar tuner is provided with the instrument selection switch 80 and can be used for tuning the guitar and bass. However, the instrument selection switch 80 may be omitted, and the guitar tuner may be used exclusively for guitars or basses. Good.

10 Input unit 20 Pitch detection unit 30 String number / note / octave discrimination unit 40 Pitch deviation calculation unit 50 Pitch deviation display control unit 60 String number / note / octave display control unit 70 Display unit 71 Pitch deviation display unit 72 String number / note・ Octave display 80 Instrument selection switch

Claims (5)

A guitar tuner used for guitar tuning,
An input section for capturing the input sound;
A pitch detection unit for detecting the pitch of the input sound captured by the input unit;
A string number / note / octave discriminating unit for discriminating a string number, a note and an octave from the pitch of the input sound detected by the pitch detection unit;
A string number / note / octave display for displaying the string number, note and octave;
A string number / note / octave display control section for displaying the string number, note and octave on the string number / note / octave display section;
A pitch deviation calculator for obtaining a pitch deviation of the pitch with respect to a reference pitch determined from the note and the octave;
A pitch deviation display unit that includes a plurality of segments and displays the pitch deviation by selective lighting of the segments;
A pitch deviation display control unit for displaying the pitch deviation on the pitch deviation display unit,
When the chord number / note / octave discriminating unit discriminates that the pitch is one octave higher than the pitch of the open string, the pitch deviation display control unit sets a pitch deviation range for lighting only the segment displaying the pitch deviation 0, A guitar tuner characterized in that the string number / note / octave discriminating section is narrower than when it is not discriminated that it is one octave higher. The guitar tuner according to claim 1, wherein
The range when the string number / note / octave discriminating unit is not discriminated as being one octave higher is ± 2 cents, and the range when it is discriminated as being one octave higher is ± 0.1 cents, Guitar tuner. The guitar tuner according to claim 1 or 2,
The guitar tuner characterized in that the segment is formed of a light emitting diode. The guitar tuner according to claim 1 or 2,
The guitar tuner is characterized in that the segment is composed of a liquid crystal display element. The guitar tuner according to any one of claims 1 to 4,
A guitar tuner comprising an instrument selection switch for selecting an instrument to be tuned.

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