JP2005221787A - Tuning device and program therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tuning device for suitably supporting tuning work in accordance with the just intonation. <P>SOLUTION: Pitch ratios between two or more musical tones for constituting a chord according to a predetermined temperament from a set of two or more musical tones are pre-stored in a reference frequency ratio storage part 11. A frequency extraction part 15 extracts each pitch of the two or more musical tones from the musical tone signal inputted from a musical tone signal input part 13, and passes it on to a frequency ratio calculation part 16. The frequency ratio calculation part 16 calculates the ratios among the passed-on pitches and deviation from the ratios read from the reference frequency ratio storage part 11, and outputs them to a display part 17. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tuning device, and more particularly, to a tuning device that supports tuning in accordance with the pure tone of a plurality of musical tones having different pitches.

When tuning a musical instrument, prepare a device such as a tuning fork that produces a reference pitch frequency (for example, 440 Hz), and the user can hear the pitch deviation between the sound produced by this device and the sound produced by the instrument. By doing so, it is common to adjust the pitch of the musical instrument as appropriate. And the invention regarding the tuning apparatus for supporting this tuning work is proposed until now.
For example, Patent Literature 1 discloses a tuning device suitable for a tuning method that is a flat tuning that tunes each open string of a guitar one semitone to one tone lower than the basic pitch. According to this document, this tuning device preliminarily calculates a pitch of a reference sound for tuning and a relative change amount (for example, “−semitone” or “−1 sound”) between the pitch of the reference sound and the pitch to be tuned. After the setting, when a musical sound signal is input by hitting an open string, the following processing is executed. First, a pitch is extracted from the input musical sound signal, and a pitch corresponding to the pitch is specified. Thereafter, in accordance with a preset relative change amount, a pitch name having a pitch lower than the pitch is displayed as a pitch name corresponding to the musical tone signal. Thereby, the tuner can perform flat tuning while using the pitch name of the basic pitch of the open string as a reference.
Patent Document 2 discloses a tuning device that supports tuning when playing chords. According to this document, this tuner is used to input the musical tone signal to be tuned after the pitch name of the musical tone to be tuned and the pitch difference between the musical tone and the standard musical tone to be played are set. Accept. Then, this tuning device specifies the pitch of the standard musical tone based on the set pitch name and pitch difference, and emits the standard musical tone at the pitch indicated by this pitch. On the other hand, the pitch difference between the standard musical tone and the musical tone to be tuned is converted into the pitch difference of the pure temperament, added to the pitch of the standard musical tone, and the pitch obtained by the addition and the pitch of the musical tone signal of the musical tone to be tuned And the error is displayed. As a result, it is possible to perform tuning such that a pure chord sound is played with respect to the pitch of the standard musical tone.
Japanese Patent Application No. 05-66766 JP 2002-132256 A

By the way, when performing an ensemble with a plurality of performers or performing a solo piece that plays a chord, tuning in accordance with pure temperament is often preferred. Pure temperament means a temperament in which the pitch between each tone is determined by a simple integer ratio so that the major perfect fifth and third major in all scales sound in a chord-like manner.
As described in Patent Document 2, although a tuning device that supports tuning according to this pure temperament has been proposed, the tuning device first selects a reference tone from a plurality of musical sounds that constitute a chord. The shift between the pitch obtained by designating and adding a predetermined difference value to the pitch of the reference sound and the pitch extracted from the input signal is merely presented.
However, when tuning according to pure temperament, if the relationship between the pitches of multiple musical tones is in accordance with an integer ratio, it is possible to realize the sound of genuine chords by each musical tone. There are actually many cases in which tuning is based on the reverberation of each musical sound, rather than fixing one pitch as a reference sound and fine-tuning other musical sounds depending on the fixed pitch. . The tuning device described in Patent Document 2 is unsuitable for tuning work in this mode.
The present invention has been devised under such circumstances, and it is an object of the present invention to provide a tuning device that better supports tuning work in accordance with pure temperament.

  A tuning device according to a preferred aspect of the present invention is a ratio storage means for storing a pitch ratio between a plurality of musical sounds for inputting a musical tone signal, in which a plurality of musical tone sets constitute a chord according to a predetermined musical temperament. Input means for extracting, from the input musical sound signal, extraction means for extracting the pitches of a plurality of musical sounds produced simultaneously or successively, and ratio calculating means for calculating a pitch ratio between the extracted pitches. A determination means for reading the pitch ratio from the ratio storage means, determining a deviation between the read pitch ratio and the pitch ratio calculated by the ratio calculation means, and a display means for displaying a determination result by the determination means. .

  The tuning device according to another preferred aspect of the present invention provides a pitch ratio between a plurality of musical sounds for a set of a plurality of musical sounds to constitute a chord according to a predetermined temperament, for each pitch difference of the respective musical sounds. Stored ratio storage means, setting means for setting a pitch difference between a plurality of musical sounds to be tuned, input means for inputting a musical sound signal, and a plurality of sounds generated simultaneously or successively from the inputted musical sound signals Extraction means for extracting the pitch of each musical tone, ratio calculating means for calculating the pitch ratio between the extracted pitches, and reading out the pitch ratio associated with the set pitch difference from the ratio storage means, A determination unit configured to determine a deviation between the read pitch ratio and the pitch ratio calculated by the ratio calculation unit; and a display unit configured to display a determination result by the determination unit.

  In both aspects described above, the determination means calculates a deviation value quantitatively indicating the degree of deviation between the read pitch ratio and the calculated pitch ratio, and the display means displays the deviation value. It may be.

  In addition, the tuning program which is another preferred aspect of the present embodiment includes a ratio storage unit that stores a pitch ratio between a plurality of musical sounds for a set of a plurality of musical sounds to constitute a chord according to a predetermined temperament. Extracting the pitches of a plurality of musical sounds generated simultaneously or successively from the musical sound signals input from the input means to a computer device comprising input means for inputting musical sound signals and information display means An extraction process; a ratio calculation process for calculating a pitch ratio between the extracted pitches; a pitch ratio is read from the ratio storage unit; and the read pitch ratio and the pitch ratio calculated in the ratio calculation process A determination process for determining a shift and a display process for displaying the determination result in the determination process on the display means are executed.

  According to the present invention, a pitch ratio desirable for a plurality of musical sounds to form a chord is stored in advance, and a deviation between the pitch ratio and the pitch ratios of the plurality of musical sounds respectively extracted from the musical sound signal is displayed. Therefore, it is possible to more efficiently perform tuning at a pitch that constitutes a pure chord.

(First embodiment)
Hereinafter, the tuning device according to the first embodiment of the present invention will be described. The tuning device according to the present embodiment is suitable for tuning each string of a stringed instrument, and the feature thereof is that a suitable pitch ratio between two sounds for constituting a pure chord is stored in advance, and this ratio And a deviation from the ratio between the pitches extracted from the two types of musical tone signals input as tuning targets is presented to the tuner.
Here, in the following description, the term “musical sound” is used to mean a sound that can be represented by one note name. Further, the term “interval” is used to mean a scale indicating a pitch difference between a plurality of musical sounds by a semitone interval. For example, if the pitch difference between two sounds separated by four semitones is expressed by this scale, it becomes “long 3 degrees”, and if the pitch difference between two sounds separated by seven semitones is expressed by “perfect 5”. Degree ".

  FIG. 1 is a block diagram showing a hardware configuration of the tuning device according to the present embodiment. As shown in the figure, the tuning device includes a reference frequency ratio storage unit 11, a chord information setting unit 12, a musical tone input unit 13, a time domain extraction unit 14, a frequency extraction unit 15, and a frequency ratio calculation unit. 16 and a display unit 17.

  The reference frequency ratio storage unit 11 is, for example, a non-volatile storage element, and stores a table in which pitch ratios for making two musical tones become genuine chords are described for each pitch difference between the two musical tones. FIG. 2 is a data structure diagram of a table stored in the reference frequency ratio storage unit 11. Each record constituting this table has two fields of “interval” and “pitch ratio”. In the “interval” field, an interval between two musical sounds such as “perfect 5 degrees” and “long 3 degrees” is recorded. In the “pitch ratio” field, the relative relationship with the other pitch when the lower pitch (basic frequency) of the two musical sounds played with the pitch difference indicated by each interval is “1”. Is recorded. For example, the second record of this table is associated with an interval of “completely 5 degrees” and a pitch ratio of “1: 3/2”. This record has a pitch ratio of “1” when the interval between the two musical sounds is 5 degrees, such as a pair of A and E sounds and a pair of C and G sounds, with the musical sound having the lower pitch as a reference. : 3/2 "indicates that a genuine chord can be played when tuning is performed.

The chord information setting unit 12 includes an input element for setting an interval between two musical tones to be tuned.
The musical sound input unit 13 includes a microphone, a vibration sensor, an amplification circuit, a filter circuit, and the like, and after shaping the musical sound signal acquired from the performance sound of the tuner, outputs it to the time domain extraction unit 14 and the frequency extraction unit 15. To do.
The time domain extraction unit 14 detects whether or not the amplitude level indicated by the waveform of the musical tone signal input from the musical tone input unit 13 exceeds a predetermined threshold, and the pitch is stable while the amplitude level exceeds the threshold. While the signal indicating that it is in the section is supplied to the frequency extraction unit 15, the signal indicating that it is in the pitch unstable section is supplied to the frequency extraction unit 15 while it is below.

When the signal indicating that it is in the pitch stable section is supplied from the time domain extraction unit 14, the frequency extraction unit 15 extracts the pitch of the musical sound from the waveform of the musical sound signal. Specifically, the pitch is extracted by detecting each zero cross when the waveform of the musical sound signal changes from negative to positive and measuring the time interval of these zero crosses. Note that the pitch may be extracted when a signal indicating that the pitch is stable is supplied and when the variation of the detected zero-cross time interval is smaller than a predetermined value. In this case, while the pitch is not extracted, the last extracted pitch may be held and output.
The frequency ratio calculation unit 16 includes an MPU (micro processor unit) that performs various calculations, a memory that temporarily stores data, and the like, and the pitch ratio between the pitches extracted for each tone by the frequency extraction unit 15. And a deviation value between the calculated pitch ratio and the pitch ratio stored in the reference frequency ratio storage unit 11 is calculated.
The display unit 17 is a segment type LED (light emitting diode) that can display the deviation value calculated by the frequency ratio calculation unit 16 to the second decimal place.

FIG. 3 is a flowchart showing the operation of the tuning device according to the present embodiment.
Before operating the tuning apparatus, the tuner first sets an interval between two musical sounds to be tuned in the chord information setting unit 12. For example, if a tuner wants to tune a string with a pitch of “C (do)” and a string with a pitch of “G (so)” of his stringed instrument, an interval indicating the pitch difference between the two sounds is “complete” “5 degrees” is set in the chord information setting unit 12. The chord information setting unit 12 delivers the set interval to the frequency ratio calculation unit 16 (S110). The frequency ratio calculation unit 16 temporarily stores the interval in its own memory.
Subsequently, the tuner performs two musical sounds to be tuned in order using their musical instruments. When each musical tone is played, the musical tone signal is supplied from the musical tone input unit 13 to the time domain extraction unit 14 and the frequency extraction unit 15.

  The frequency extraction unit 15 identifies the pitch stable section of the supplied musical sound signal based on the support of the time domain extraction unit 14, extracts the pitch from the waveform of the section, and delivers it to the frequency ratio calculation unit 16 (S120). . The frequency ratio calculation unit 16 temporarily stores the pitch extracted for each musical sound in its own memory. As described above, the frequency extraction unit 15 according to the present embodiment is configured to extract the pitch by detecting the time interval of the zero cross, and simultaneously extracts the pitches of two musical sounds having different pitches. The function to do is not installed. Therefore, the tuner first presses a microphone drive button (not shown), first plays the lower musical tone of the two musical notes to be tuned, and then presses the microphone drive button again, and then presses the higher musical tone. Play. Thereby, the frequency ratio calculation part 16 can each extract the pitch of two musical sounds used as tuning object.

The frequency ratio calculation unit 16 calculates the ratio of the pitches of the two musical sounds acquired from the frequency extraction unit 15 (S130). The calculation of the ratio is performed based on the pitch of the previously played musical tone, that is, the musical tone having the lower pitch.
Subsequently, the frequency ratio calculation unit 16 reads the pitch ratio stored in the reference frequency ratio storage unit 11 in association with the interval acquired from the chord information setting unit 12 (S140).
The frequency ratio calculation unit 16 calculates a deviation value indicating the degree of deviation between the ratio calculated in step 130 and the ratio read in step 140, and outputs the deviation value to the display unit 17 (S150). The display unit 17 displays the deviation value output from the frequency ratio calculation unit 16. For example, if a string with a pitch of “C (do)” and a string with a pitch of “G (so)” were played after the “perfect fifth” interval was set, the musical tone played first Indicates the degree of deviation between the pitch ratio calculated based on the pitch of “C (do)” and the pitch ratio of “3/2” stored in the reference frequency ratio storage unit 11 in association with the set interval. The deviation value is displayed. By referring to the displayed deviation value, the tuner can grasp how finely the string to be tuned is adjusted to produce a pure chord.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. The above embodiment mainly supports a suitable tuning of each string stretched on one instrument, but the tuning device according to this embodiment supports a suitable tuning among a plurality of musical instruments. To do.
FIG. 4 is a block diagram showing a hardware configuration of the tuning device according to the present embodiment. The difference from the hardware configuration shown in FIG. 1 is that the time domain extraction unit 14 is not provided and that an FFT (fast Fourier transform) unit 18 is provided instead of the frequency extraction unit 15. The FFT unit 18 performs a fast Fourier transform process on the musical tone signal supplied from the musical tone input unit 13 to acquire the frequency spectrum, and extracts each peak value indicated by the spectrum as the pitch of the musical tone. The FFT unit 18 equipped with such a function can individually extract each pitch from an audio signal on which a plurality of musical sounds are superimposed.

Next, the operation of this embodiment will be described.
The operation of the present embodiment is the same as that of the first embodiment except for the processing (step 120 in FIG. 3) when extracting the pitch from the musical tone signal. The frequency extraction unit 15 in the first embodiment extracts the pitch of a musical signal having a higher pitch after receiving a musical signal having a lower musical pitch from two musical tones to be tuned and extracting the pitch. I was doing the operation. On the other hand, in this embodiment, a plurality of tuners simultaneously play musical tones to be tuned using their musical instruments. Then, a musical sound signal on which a plurality of musical sounds are superimposed is supplied from the musical sound input unit 13 to the FFT unit 18, and the FFT unit 18 individually extracts the pitch of each musical sound from the supplied musical sound signal to obtain a frequency ratio calculation unit. Deliver to 16.
Thereafter, the processing after step 130 shown in FIG. 3 is executed.
According to the present embodiment described above, the pitches of two musical sounds inputted at the same time are respectively extracted, and the deviation between the ratio between the extracted pitches and a suitable pitch ratio for constructing a pure chord is tuned. Present to the person. Accordingly, when performing an ensemble using two musical instruments, it is possible to very easily perform tuning so that the musical tones played by these musical instruments become genuine chords.

(Third embodiment)
The tuning device according to both embodiments described above includes the chord information setting unit 12, and the pitch ratio to be read from the reference frequency ratio storage unit 11 is uniquely set using the interval set by the tuner as the key. It was to identify. On the other hand, in the present embodiment, the pitch names to be played are identified from the pitches extracted from the tone signals, and the pitch ratios to be read are uniquely identified based on the pitch names. It has become.

  FIG. 5 is a block diagram showing a hardware configuration of the tuning device according to the present embodiment. The difference from the hardware configuration shown in FIG. 1 is that an interval specifying unit 19 is provided instead of the chord information setting unit 12. The interval specifying unit 19 includes an MPU and a memory that stores a pitch name table and an interval table in advance. The pitch name table associates a pitch range that can be regarded as a pitch of each musical tone with a pitch name of each musical tone. On the other hand, the interval table associates each combination of the names of the two musical sounds to be paired with the interval between each pair of musical sounds.

Next, the operation of this embodiment will be described.
The operation of the present embodiment is the same as that of the first embodiment except for the processing (step 140 in FIG. 3) when reading the pitch ratio from the reference frequency ratio storage unit 11. In the first embodiment, an interval between a plurality of musical sounds to be tuned is set in advance in the chord information setting unit 12, and a pitch ratio corresponding to the set interval is read out. On the other hand, in this embodiment, the interval specifying unit 19 performs a process of reading the pitch ratio from the reference frequency ratio storage unit 11 and delivering it to the frequency ratio calculation unit 16.

This process will be described more specifically as follows. First, the frequency extraction unit 15 supplies the pitch of each musical sound read out in step 120 of FIG. The interval specifying unit 19 refers to the pitch name table based on the supplied pitch, and acquires the pitch names of the two musical sounds corresponding to these pitches. Then, based on the acquired both-tone names, this time, referring to the interval table, the interval between these two musical sounds is acquired. Finally, the pitch ratio associated with this interval is read from the reference frequency ratio storage unit 11 and delivered to the frequency ratio calculation unit 16.
Thereafter, the process of step 150 shown in FIG. 3 is executed.

  According to the present embodiment described above, the tuner can grasp the pitch ratio of the two musical sounds by simply playing the two musical sounds to be tuned in order without setting an interval in advance. Therefore, tuning can be performed without performing a cumbersome operation such as calculating a pitch difference between two musical sounds.

  It should be noted that the configuration and operation of this embodiment are conceptually described as follows: “The pitch ratio between a plurality of musical sounds to form a chord in accordance with a pure temperament, The ratio storage means stored for each, the pitch range storage means for storing the pitch range that can be regarded as each musical tone in association with the pitch name of each musical tone, and the pitch difference between the plurality of musical sounds. A pitch difference storage means stored for each combination of musical tone names, an input means for inputting musical tone signals, and a plurality of pitches of a plurality of musical sounds generated simultaneously or successively from the inputted musical tone signals. A combination of the musical name name identifying means for identifying the pitch name associated with the pitch range corresponding to each extracted pitch from the pitch range storage means, and the identified pitch name. A pitch difference specifying unit for specifying the associated pitch difference from the pitch difference storing unit, a ratio calculating unit for calculating a pitch ratio between the extracted pitches, and a pitch ratio associated with the specified pitch difference A tuning apparatus comprising: a judgment unit that reads out the ratio from the ratio storage unit, judges a deviation between the read pitch ratio and the pitch ratio calculated by the ratio calculation unit, and a display unit that displays a judgment result by the judgment unit. "

(Other embodiments)
The present invention can be modified in various ways. In the following, preferred embodiments other than those described above will be introduced.
The above embodiment supports the tuning of two musical tones played at the same time or at different timings. However, the tuning is supported so that a set of three or more musical tones constitutes a pure chord. May be. For example, long chords such as C (do), G (mi), and E (so) are considered to be genuine chords when tuned so that the pitch ratio is 4: 5: 6. Therefore, if this pitch ratio is stored in advance in the reference frequency ratio storage unit in association with the “long 3 chord” interval, the three musical tones can be tuned.
The tuning device according to the second embodiment includes an FFT unit 18, and the FFT unit 18 performs a fast Fourier transform process on the musical tone signal to simultaneously extract a plurality of musical tone pitches. The pitch for each musical tone may be obtained from the frequency amplitude calculated by a plurality of band pass filters. Further, such an FFT unit 18 may replace the frequency extraction unit 15 in the first embodiment.

  As shown in FIG. 2, the reference frequency ratio storage unit 11 stores the pitch ratio of two musical tones that constitute a genuine chord, but the pitch ratio between musical tones of combinations that are not often used as chords. May be stored, and an error from the pitch ratio of the musical tone of the combination may be presented. For example, by storing a pitch ratio associated with an interval of “short second” and presenting a deviation between the pitch ratio and the performance sound, it can be used to practice a musical tone that is higher by a semitone.

In the above embodiment, the display unit 17 segmentally displays a numerical value indicating a deviation between the pitch ratio between the pitches extracted from the performance sound and the pitch ratio read from the reference frequency ratio storage unit 11. On the other hand, the deviation between the two pitch ratios may be quantified as the deflection width of the meter needle. Further, the numerical value of the pitch extracted from the performance sound itself may be displayed together with the pitch ratio, or the deviation between both pitches may be displayed in cents. Furthermore, a graphic in which the direction in which the pitch is to be adjusted (for example, “high” or “low”) is indicated by an arrow may be displayed. Further, it may be determined alternatively whether there is a ratio deviation or only the determination result may be displayed.
In the above embodiment, the pitch ratio is calculated based on the lower musical tone of the two musical sounds to be tuned. However, the tuner himself determines which musical tone is the reference sound. It is good also as a structure which can be selected. For example, since the pitch ratio when the pitch is set higher by 3 degrees and the pitch ratio when the pitch is lowered by 3 degrees have a reciprocal relationship, the introduction of such a modified example introduces the data amount of the reference frequency ratio storage unit This can be achieved without increasing.

Although the above embodiment has been described mainly as being used for tuning a stringed instrument, it may of course be used for tuning a wind instrument.
The FFT unit 18 of the second embodiment may extract not only the pitch of each musical sound, that is, the fundamental frequency but also the harmonic frequency component, and display the distribution together with the pitch ratio. By adopting such a configuration, it is possible to allow the tuner to grasp not only the good reverberation of a plurality of musical tones as a chord but also the good reverberation of each musical sound constituting the chord.

  The operation of each part shown in the above embodiment and the sequence data of chord practice music may be linked to use as an ensemble practice system. The outline of this system is as follows. This practice system stores sequence data in which desirable pitch ratios of two musical sounds to be played as chords in a practice song are stored in time series in association with the performance timings of those musical sounds. In this practice system, when the practitioner extracts each pitch from the musical sound signals that are sequentially input by performing according to the music of the practice music, the ratio between these pitches changes to match the content of the music. And show the deviation from the score as a score. For example, the first bar is a combination of notes that make up a chord of the third degree, and the next bar is a musical score in which the notes of the combination that make up the chord of the third degree are written. If it has been prepared, it is determined whether the pitch ratio of the musical tones in the first bar is “4: 5”, and the pitch ratio of the next bar is “5: 6”. A process such as determining is performed. Then, after the performance is completed, the deviation of the pitch ratio throughout the practice song is displayed as a score. By practicing with the support of a practice system that performs such processing, it becomes possible to realize an ensemble that produces a pleasant chordal sound.

In the above embodiment, tuning according to pure temperament was supported. However, the contents of the pitch ratio stored in the reference frequency ratio storage unit 11 are changed to Pythagoras, Velkmeister, Kimberger, and Ramis. By changing the pitch ratio between the musical sounds according to other predetermined temperaments such as the above, it may be used as a device that supports the tunes based on these temperaments.
Further, a program for performing the same operation as each unit shown in the above embodiment may be mounted on a known computer device and used as a tuning device.

It is a block diagram which shows the hardware constitutions of 1st Embodiment. It is a data structure figure of the table memorize | stored in the reference frequency ratio memory | storage part. It is a flowchart which shows operation | movement of embodiment. It is a block diagram which shows the hardware constitutions of 2nd Embodiment. It is a block diagram which shows the hardware constitutions of 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Reference frequency ratio storage part, 12 ... Chord information setting part, 13 ... Musical sound input part, 14 ... Time domain extraction part, 15 ... Frequency extraction part, 16 ... Frequency ratio calculation part, 17 ... Display part, 18 ... FFT part , 19 ... Interval identification part

Claims (4)

A ratio storage means for storing a pitch ratio between the plurality of musical sounds for a set of a plurality of musical sounds to constitute a chord according to a predetermined temperament;
An input means for inputting a musical sound signal;
An extraction means for extracting the pitches of a plurality of musical sounds generated simultaneously or successively from the input musical sound signal;
A ratio calculating means for calculating a pitch ratio between the extracted pitches;
A determination means for reading a pitch ratio from the ratio storage means, and determining a deviation between the read pitch ratio and the pitch ratio calculated by the ratio calculation means;
A tuning device comprising: display means for displaying a judgment result by the judgment means. A ratio storage means for storing a pitch ratio between the plurality of musical sounds for forming a chord in accordance with a predetermined temperament for each musical tone group;
A setting means for setting a pitch difference between a plurality of musical sounds to be tuned;
An input means for inputting a musical sound signal;
An extraction means for extracting the pitches of a plurality of musical sounds generated simultaneously or successively from the input musical sound signal;
A ratio calculating means for calculating a pitch ratio between the extracted pitches;
A determination means for reading a pitch ratio associated with the set pitch difference from the ratio storage means, and determining a deviation between the read pitch ratio and the pitch ratio calculated by the ratio calculation means;
A tuning device comprising: display means for displaying a judgment result by the judgment means. In the tuning device according to claim 1 or 2,
The determination means is
Calculating a deviation value quantitatively indicating the degree of deviation between the read pitch ratio and the calculated pitch ratio;
The display means is
A tuning device that displays the deviation value. A ratio storage means for storing a pitch ratio between the plurality of musical sounds for a set of a plurality of musical sounds to constitute a chord according to a predetermined temperament;
An input means for inputting a musical sound signal;
A computer device comprising information display means;
An extraction process for extracting the pitches of a plurality of musical sounds generated simultaneously or successively from the musical sound signals input from the input means;
A ratio calculation process for calculating a pitch ratio between the extracted pitches;
A determination process for reading a pitch ratio from the ratio storage unit, and determining a deviation between the read pitch ratio and the pitch ratio calculated in the ratio calculation process;
A program for executing display processing for displaying the determination result in the determination processing on the display means.

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