JP2008089975A - Electronic musical instruments - Google Patents

Abstract

An operation for automatic accompaniment is made easier.
A chord progression database 11 for recording a first chord progression indicating a permutation formed from a plurality of chords, a chord progression converter 13 for transposing the first chord progression to a second chord progression, and a second chord A display unit 14 for displaying the progress on the display 5 and an automatic accompaniment unit 15 for automatically accompaniing an accompaniment pattern corresponding to a chord corresponding to the key of the accompaniment keyboard 6 are provided. That is, the electronic musical instrument 1 can transpose to the second chord progression that can be accompanied more easily than the first chord progression. At this time, the user can automatically accompaniment the electronic musical instrument 1 more easily by operating the accompaniment keyboard 6 in accordance with the second chord progression displayed on the display 5.
[Selection] Figure 1

Description

  The present invention relates to an electronic musical instrument, and more particularly, to an electronic musical instrument that automatically accompanies an accompaniment pattern generated based on a chord detected based on a user operation.

  2. Description of the Related Art There is known an electronic keyboard with an automatic accompaniment that automatically accompanies an accompaniment pattern generated based on a chord detected based on a user operation. When a player accompanies a song using such an electronic keyboard with automatic accompaniment, it is necessary to prepare a score on which the chord progression of the song is displayed. Such a musical score displays the chords of the original music, and even a simple three chord music may be difficult to play for beginners because # and ♭ are frequently used depending on the key. There is a demand for an electronic musical instrument that facilitates operations related to automatic accompaniment.

  Japanese Patent Application Laid-Open No. 10-11064 discloses a code conversion device and a code conversion device capable of searching and displaying a code type that can be logically replaced with the code by simply specifying a key and a code name. An electronic musical instrument having the above is disclosed. The code conversion apparatus includes a distance calculation unit that calculates a distance between a key and a code route for an arbitrary code, a code type search unit that calculates a code type that can be used instead of the code based on the calculated distance and code type, and It is characterized by having.

  In Japanese Patent Laid-Open No. 2002-287743, a user can refer to a musical instrument performance method related to a chord (chord) desired by a user with a simple operation, and simultaneously display a musical instrument performance method related to a plurality of chords (chords). There has been disclosed a performance support apparatus that can quickly confirm a musical instrument performance method for each (chord). The performance support apparatus reads from the storage means a display means, a storage means for storing a chord progression relating to a predetermined song for each song, a song designation means for designating a song, and a chord progression corresponding to the designated song, Chord display control means for displaying on the display means a chord corresponding to the progress of the musical performance based on the read chord progression, a performance method storage means for storing a chord performance method for a predetermined musical instrument for each chord, and the display means The chord selection means for selecting one of the chords displayed on the display, the playing method of the selected chord is read out from the playing method storage means, and the playing method of the read chord is displayed on the display means in a predetermined display mode. Display control means.

Japanese Patent Laid-Open No. 10-11064 JP 2002-287743 A

  An object of the present invention is to provide an electronic musical instrument that facilitates operations related to automatic accompaniment.

  In the following, means for solving the problems will be described using the reference numerals used in the best modes and embodiments for carrying out the invention in parentheses. This reference numeral is added to clarify the correspondence between the description of the claims and the description of the best mode for carrying out the invention / example, and is described in the claims. It should not be used to interpret the technical scope of the invention.

  An electronic musical instrument (1) according to the present invention includes a chord progression database (11) that records a first chord progression indicating a permutation formed from a plurality of chords, and a chord progression that transposes the first chord progression to a second chord progression. An accompaniment pattern corresponding to a chord corresponding to a key that has been pressed in the conversion section (13), a chord progression display section (14) for displaying the second chord progression on the display (5), and an accompaniment keyboard (6) And an automatic accompaniment section (15) for automatically accompaniment. That is, the electronic musical instrument (1) can transpose to the second chord progression that can be accompanied more easily than the first chord progression. At this time, the user can automatically accompaniment the electronic musical instrument (1) more easily by operating the accompaniment keyboard (6) in accordance with the second chord progression displayed on the display (5).

  The chord progression conversion unit (13) is configured so that the key corresponding to the second chord progression becomes a predetermined key, for example, so that the key corresponding to the second chord progression becomes either C major or A minor. It is preferable to transpose the first chord progression to the second chord progression. At this time, the electronic musical instrument (1) can make it easier for the user to operate the accompaniment keyboard (6).

  The number of chords that include the sound added with the sharp or flat of the chords constituting the second chord progression includes the sound that is added with the sharp or flat of the chords constituting the first chord progression. The number is preferably less than the number of cords. At this time, the electronic musical instrument (1) can make it easier for the user to operate the accompaniment keyboard (6).

  The types of chords constituting the second chord progression are fewer than the chord types constituting the first chord progression. For example, the type of chord constituting the second chord progression is any one of a major chord, a minor chord, a dominant 7th chord, a minor 7th chord, a minor 7th (♭ 5) chord, and a diminished 7th chord. At this time, the electronic musical instrument (1) can make it easier for the user to operate the accompaniment keyboard (6).

  The chord progression database (11) records the first melody. The chord progression conversion unit (13) transposes the first melody to the second melody. At this time, the chord progression display section (14) preferably displays the second melody on the display (5).

  The pitch of the accompaniment pattern with respect to the chord corresponding to the key is preferably equal to the pitch of the first chord progression with respect to the second chord progression.

  An electronic musical instrument (1) according to the present invention has a chord progression database (11) for recording a first chord progression indicating a permutation formed from plural chords, and a pitch of plural chords for a key corresponding to the first chord progression. A chord progression display section (14) displayed on the display (5), and an automatic accompaniment section (15) for automatically accompaniing an accompaniment pattern corresponding to a chord corresponding to the key of the accompaniment keyboard (6). I have. For example, the chord progression display unit (14) displays the frequency of a plurality of chords for the key corresponding to the first chord progression on the display (5). At this time, the user can automatically accompany the electronic musical instrument (1) more easily by operating the accompaniment keyboard (6) according to the frequency displayed on the display (5).

  The electronic musical instrument according to the present invention can transpose to the second chord progression which can be accompanied more easily than the first chord progression. At this time, the user can perform accompaniment more easily using the electronic musical instrument according to the present invention by operating the accompaniment keyboard in accordance with the second chord progression displayed on the display.

  An embodiment of an electronic musical instrument according to the present invention will be described with reference to the drawings. In the electronic musical instrument 1, as shown in FIG. 1, the electronic musical instrument main body 2 includes a setting input device 3, a display 5, an accompaniment keyboard 6, a performance keyboard 7, and a speaker 8.

  The setting input device 3 includes a plurality of switches. The setting input device 3 outputs to the electronic musical instrument main body 2 an electrical signal indicating the operated switch of the plurality of switches and the state of the switch. That is, the user operates the setting input device 3 to generate information, and inputs the information to the electronic musical instrument main body 2.

  The display 5 is formed from a liquid crystal display and displays a screen generated by the electronic musical instrument main body 2.

  The accompaniment keyboard 6 includes a plurality of keys. The plurality of keys are formed of a plurality of white keys and a plurality of black keys, and each correspond to a plurality of different pitches. The accompaniment keyboard 6 outputs an electric signal indicating the key that has been pressed to the electronic musical instrument body 2.

  The performance keyboard 7 includes a plurality of keys. The plurality of keys are formed of a plurality of white keys and a plurality of black keys, and each correspond to a plurality of different pitches. The performance keyboard 7 outputs to the electronic musical instrument main body 2 an electric signal indicating the key that has been pressed and the strength of the key.

  The speaker 8 converts the electrical signal generated by the electronic musical instrument main body 2 into sound, that is, sounds the musical sound generated by the electronic musical instrument main body 2.

  The electronic musical instrument main body 2 is a computer, and a plurality of computer programs are installed. A CPU and a storage device (not shown) are provided. The CPU executes a computer program installed in the electronic musical instrument main body 2 and controls the storage device, the setting input device 3, the display 5, the accompaniment keyboard 6, the performance keyboard 7, and the speaker 8. The storage device records the computer program and temporarily records information generated by the CPU.

  The electronic musical instrument main body 2 is installed with a chord progression database 11, a setting section 12, a chord progression conversion section 13, a chord progression display section 14, an automatic accompaniment section 15, and a performance section 16, which are computer programs.

  The chord progression database 11 records a plurality of pieces of music in a storage device, selects one piece of music from the plurality of pieces of music based on the operation of the setting input device 3, and can process information by another computer program. Thus, the music data regarding the music is read from the storage device. The music data indicates the key, chord progression, and melody of the music. The chord progression indicates a permutation formed from a plurality of chords.

  The setting unit 12 switches the mode based on the operation of the setting input device 3. The modes include a normal mode, a first beginner mode, a second beginner mode, and a third beginner mode.

  The chord progression conversion unit 13 is the music data read from the chord progression database 11 when the setting unit 12 is switched to any one of the first beginner mode, the second beginner mode, and the third beginner mode. Based on the above, the pitch when the key of the music is set to C major or A minor is calculated. The chord progression conversion unit 13 transposes the chord progression of the music by the pitch to generate another chord progression, and transposes the melody of the music by the pitch to generate another melody.

  The chord progression display unit 14 generates a screen showing the chord progression indicated by the music data read from the chord progression database 11 when the setting unit 12 is switched to the normal mode, and displays the screen on the display 5. To do. The chord progression display unit 14 generates a screen showing the chord progression generated by the chord progression conversion unit 13 when the setting unit 12 is switched to either the first beginner mode or the second beginner mode. Then, the screen is displayed on the display 5. The chord progression display unit 14 generates a screen showing the chord progression indicated by the music data read from the chord progression database 11 using the frequency when the setting unit 12 is switched to the third beginner mode. A screen is displayed on the display 5.

  The automatic accompaniment part 15 has recorded the accompaniment pattern in the memory | storage device. The automatic accompaniment unit 15 calculates a chord based on the key on the accompaniment keyboard 6. The automatic accompaniment part 15 calculates the accompaniment pattern transposed from the accompaniment pattern based on the chord. The automatic accompaniment unit 15 creates an electrical signal indicating the calculated accompaniment pattern when the setting unit 12 is switched to one of the normal mode, the first beginner mode, and the third beginner mode, The electric signal is output to the speaker 8, and the accompaniment pattern is generated from the speaker 8. The automatic accompaniment unit 15 generates an electrical signal indicating an accompaniment pattern obtained by transposing the calculated accompaniment pattern by the pitch calculated by the chord progression conversion unit 13 when the setting unit 12 is switched to the second beginner mode. Then, the electric signal is output to the speaker 8, and the accompaniment pattern is generated from the speaker 8.

  The performance unit 16 creates an electrical signal indicating a musical tone calculated based on the key that is pressed on the performance keyboard 7 and the key strength of the key, and outputs the electrical signal to the speaker 8, Immediately after the key is pressed, the musical sound is generated from the speaker 8. For example, the loudness and envelope of the musical sound correspond to the keying strength of the key that has been pressed. The pitch of the musical sound corresponds to the key on the performance keyboard 7 when the setting unit 12 is switched to the normal mode, the first beginner mode, or the third beginner mode. When the setting unit 12 is switched to the second beginner mode, the pitch obtained by transposing only the pitch calculated by the chord progression conversion unit 13 from the pitch corresponding to the key pressed on the performance keyboard 7 is shown. ing.

  FIG. 2 shows a chord progression data table recorded in the storage device by the chord progression database 11. The chord progression data table 21 associates the song name 22 with the key 23, tempo 24, chord progression pattern 25, and melody 26. The song name 22 identifies a song and indicates the song name of the song. The key 23 indicates the key of the music identified by the music name 22. The tempo 24 indicates the tempo of the music identified by the music title 22. The chord progression pattern 25 indicates chord progression indicating a permutation of chords used for the music identified by the song title 22. The melody 26 indicates the melody of the music identified by the music title 22.

  FIG. 3 shows chord progression data indicated by the chord progression pattern 25 of the chord progression data table 21. The chord progression data 31 associates the chord 33 with the timing 32. Timing 32 indicates the timing included in the period in which the music is played, and indicates the number of measures and the number of beats. The number of measures indicates a measure including the timing of the music. The number of beats indicates the time from the beginning of the measure to the timing. For example, the timing 32 is expressed as “i−j” using a natural number i and a natural number j, where the natural number i indicates the number of measures and the natural number j indicates the number of beats. Yes. A chord 33 indicates an accompaniment chord that starts at the timing indicated by the timing 32, and indicates the chord name of the chord.

  The chord 33 is associated with the pitch 34, the basic chord 35, and the extension chord 36. The pitch 34 indicates the pitch between the chord root indicated by the chord 33 and the main key of the music key. The basic code 35 indicates the type of code indicated by the code 33, and any one of a major code, a minor code, a dominant 7th code, a minor 7th code, a minor 7th (♭ 5) code, and a diminished 7th code is set to 0. It is indicated by an integer of 5. The extension code 36 indicates the type of code indicated by the code 33, and the type further classified from the type indicated by the basic code 35 is indicated by an integer of 0-9.

  The chord progression pattern 25 of the chord progression data table 21 describes only the timing 32, the pitch 34, the basic chord 35, and the extension chord 36 of the chord progression data 31, and the chord 33 may not be described. At this time, the chord 33 in the chord progression data 31 is calculated later by the chord progression converter 13.

  FIG. 4 shows a chord pitch function table used by the chord progression converter 13. The chord pitch function table 41 associates keys 41, pitches 43, frequencies 44, and chords 45 with each other. The key 41 identifies a key and indicates the main sound of the key. The pitch 43 indicates a pitch and indicates an integer of 0 to 11. The frequency 44 indicates a frequency indicating the pitch indicated by the pitch 43, and indicates any one of I, I #, II, II #, III, IV, IV #, V, V #, VI, VI #, and VII. Yes. The chord 45 identifies the chord and indicates the root of the chord, ie, indicates a sound that differs from the key tones identified by the key 41 by the pitch indicated by the pitch 43 (or the frequency indicated by the frequency 44). Yes.

  FIG. 5 shows a chord classification table used by the chord progression converter 13. The code classification table 51 associates the extended code 52 with the basic code 53. The extended code 52 indicates a symbol excluding a symbol indicating a root tone in a code name indicating the code as a symbol. For example, the extension code 52 corresponding to the code “Cm7” having C as a root note indicates “m7”. The basic code 53 indicates the type of code to which the code indicated by the extended code 52 belongs, and is any of a major code, a minor code, a dominant 7th code, a minor 7th code, a minor 7th (♭ 5) code, and a diminished 7th code. It shows.

  At this time, the chord progression conversion unit 13 is selected by the user with reference to the chord pitch function table 41 when the setting unit 12 is switched to either the first beginner mode or the second beginner mode. The chord progression when transposing the key of the recorded music into C major or A minor is calculated. That is, the chord progression conversion unit 13 selects C major when the key of the music selected by the user is in major, and selects A minor when the key is in minor. The chord progression conversion unit 13 refers to the chord pitch function table 41 and selects a chord corresponding to the pitch 34 of the chord progression data 31 from among a plurality of root notes of the chord corresponding to the selected C major or A minor. Calculate the root note of. Next, the chord progression conversion unit 13 refers to the chord classification table 51 and calculates the transposed chord by combining the calculated root note and the symbol of the basic chord 35 of the chord progression data 31. The chord progression conversion unit 13 further calculates a pitch when the key of the music selected by the user is transposed into C major or A minor, and calculates a melody obtained by transposing the melody of the music by the calculated pitch. .

  FIG. 6 shows a screen displayed on the display 5 by the chord progression display unit 14. The screen 61 includes a chord progression display field 62 and a melody display field 63. In the chord progression display column 62, the chord is displayed in association with the timing at which the chord accompaniment calculated by the chord progression converter 13 is started, that is, in association with the measure or beat of the song. In the melody display field 63, the pitch of the first musical tone of each measure of the melody calculated by the chord progression conversion unit 13 is displayed in association with each measure of the music.

  The operation of the electronic musical instrument 1 includes a normal mode operation, a first beginner mode operation, a second beginner mode operation, and a third beginner mode operation.

  The operation in the normal mode is executed when the mode is switched to the normal mode by the operation of the setting input device 3 by the user. The electronic musical instrument 1 displays a screen showing the chord progression of the music selected by the user's operation of the setting input device 3 and a part of the melody on the display 5 as shown in FIG. When the key of the accompaniment keyboard 6 is pressed, the electronic musical instrument 1 calculates a chord based on the key. The electronic musical instrument 1 transposes the accompaniment pattern recorded in the storage device so as to match the chord and generates a sound from the speaker 8. The electronic musical instrument 1 detects the key and the key pressing strength of the key when the key of the performance keyboard 7 is pressed. The electronic musical instrument 1 calculates a musical tone based on the key and the keystroke strength, and generates the musical tone from the speaker 8 immediately after the key is depressed. The loudness and envelope of the musical sound correspond to the keying strength of the key that has been pressed. The pitch of the musical sound corresponds to the key that was pressed.

  The operation in the first beginner mode is executed when the user is switched to the first beginner mode by operating the setting input device 3. The electronic musical instrument 1 selects C major when the key of the music selected by the user's operation of the setting input device 3 is major, and selects A minor when the key is minor. The electronic musical instrument 1 combines a pitch transposed from the selected major key of A major or A minor by the pitch corresponding to each chord indicated by the chord progression data 31, and a basic chord corresponding to each chord, Calculate the code. The electronic musical instrument 1 further calculates a melody obtained by transposing the melody of the music piece by the pitch when the key of the music piece is transposed to the selected C major or A minor key. The electronic musical instrument 1 displays a screen showing the calculated plurality of chords and a part of the melody on the display 5.

  FIG. 7 shows a chord progression obtained by transposing the chord progression indicated by the chord progression data 31 of FIG. In the chord progression data 71 indicating the transposed chord progression, the chord 73 is associated with the timing 72 and the pitch 74, the basic chord 75, and the extension chord 76 are associated with the chord 73 in the same manner as the chord progression data 31. . The timing 72 coincides with the timing 32 indicated by the chord progression data 31. The pitch 74 matches the pitch 34 indicated by the chord progression data 31. The basic code 75 matches the basic code 35 indicated by the chord progression data 31. The extension codes 76 all indicate 0. The chord 73 indicates a chord in which the pitch transposed from the selected C major or A minor main tone by the pitch indicated by the pitch 74 and the symbols corresponding to the basic chord 75 and the extended chord 76 are combined. .

  FIG. 8 shows a screen showing the transposed chord progression. The screen 81 includes a chord progression display column 82 and a melody display column 83 in the same manner as the screen 61 of FIG. In the chord progression display column 82, a plurality of chords indicated by the chord 73 of the chord progression data 71 are displayed. In the melody display field 63, the pitch of the first musical tone of each measure of the transposed melody is displayed in association with each measure of the music.

  When the key of the accompaniment keyboard 6 is pressed, the electronic musical instrument 1 calculates a chord based on the key. The electronic musical instrument 1 transposes the accompaniment pattern recorded in the storage device so as to match the chord and generates a sound from the speaker 8. The electronic musical instrument 1 detects the key and the key pressing strength of the key when the key of the performance keyboard 7 is pressed. The electronic musical instrument 1 calculates a musical tone based on the key and the keystroke strength, and generates the musical tone from the speaker 8 immediately after the key is depressed. The loudness and envelope of the musical sound correspond to the keying strength of the key that has been pressed. The pitch of the musical sound corresponds to the key that was pressed.

  The operation in the second beginner mode is executed when the user is switched to the second beginner mode by operating the setting input device 3. The electronic musical instrument 1 selects C major when the key of the music selected by the user's operation of the setting input device 3 is major, and selects A minor when the key is minor. The electronic musical instrument 1 combines a pitch transposed from the selected major key of A major or A minor by the pitch corresponding to each chord indicated by the chord progression data 31, and a basic chord corresponding to each chord, Calculate the code. The electronic musical instrument 1 further calculates a melody obtained by transposing the melody of the music piece by the pitch when the key of the music piece is transposed to the selected C major or A minor key. The electronic musical instrument 1 displays a screen showing the calculated plurality of chords and a part of the melody on the display 5. That is, the electronic musical instrument 1 generates chord progression data similar to the chord progression data 71 generated in the first beginner mode, and displays a screen similar to the screen 81 displayed in the first beginner mode.

  When the key of the accompaniment keyboard 6 is pressed, the electronic musical instrument 1 calculates a chord based on the key. The electronic musical instrument 1 transposes the accompaniment pattern recorded in the storage device so as to match the chord, and further transposes the calculated pitch and produces a sound from the speaker 8. The electronic musical instrument 1 detects the key and the key pressing strength of the key when the key of the performance keyboard 7 is pressed. The electronic musical instrument 1 calculates a musical tone based on the key and the keystroke strength, and generates the musical tone from the speaker 8 immediately after the key is depressed. The loudness and envelope of the musical sound correspond to the keying strength of the key that has been pressed. The pitch of the musical tone indicates a pitch obtained by transposing the calculated pitch from the pitch corresponding to the key that has been pressed.

  In other words, when the electronic musical instrument 1 is in the second beginner mode, when the user keys the chord transposed from the original chord of the music piece using the accompaniment keyboard 6, the accompaniment pattern of the original chord is automatically set. When the user plays a melody transposed from the original melody of the music piece using the performance keyboard 7, the original melody is played.

  The operation in the third beginner mode is executed when the user has switched to the third beginner mode by operating the setting input device 3. The electronic musical instrument 1 calculates a plurality of chords by combining the frequency corresponding to the pitch corresponding to each chord indicated by the chord progression data 31 and the basic chord corresponding to each chord, and a screen showing the calculated plurality of chords Is displayed on the display 5.

  When the key of the accompaniment keyboard 6 is pressed, the electronic musical instrument 1 calculates a chord based on the key. The electronic musical instrument 1 transposes the accompaniment pattern recorded in the storage device so as to match the chord and generates a sound from the speaker 8. The electronic musical instrument 1 detects the key and the key pressing strength of the key when the key of the performance keyboard 7 is pressed. The electronic musical instrument 1 calculates a musical tone based on the key and the keystroke strength, and generates the musical tone from the speaker 8 immediately after the key is depressed. The loudness and envelope of the musical sound correspond to the keying strength of the key that has been pressed. The pitch of the musical sound corresponds to the key that was pressed.

  According to such an operation, the plurality of codes displayed on the display 5 in the first beginner mode and the second beginner mode are codes that are easier for a beginner to remember than the plurality of codes displayed in the normal mode. Yes, the user can use the accompaniment keyboard 6 in the first beginner mode or the second beginner mode to more easily key in the automatic accompaniment code than in the normal mode. Furthermore, in the electronic musical instrument 1, when the user uses the accompaniment keyboard 6 to play a chord transposed from the original chord of the music piece in the second beginner mode, the accompaniment pattern of the original chord is automatically When the user plays a melody that is accompanied and transposed from the original melody of the musical piece by using the performance keyboard 7, the original melody is played and it is suitable for a session with another musical instrument. When the electronic musical instrument 1 is in the third beginner mode, the user automatically inputs an arbitrary chord using the accompaniment keyboard 6 while browsing a plurality of frequencies displayed on the display 5 to automatically accompany the electronic musical instrument 1. Can be made.

  The chord progression conversion unit 13 can also transpose to a key other than C major or A minor, and includes, for example, a sound to which a sharp or flat of chords constituting chord progression when transposed is added. It is also possible to transpose the chord so that the number of chords is less than the number of chords including a sound to which a sharp or flat character is added among the chords constituting the original chord progression. Also at this time, the plurality of codes displayed on the display 5 in the first beginner mode and the second beginner mode are easier to remember for beginners than the plurality of codes displayed in the normal mode. In the first beginner mode or the second beginner mode, the accompaniment keyboard 6 can be used to key in an automatic accompaniment chord more easily than in the normal mode.

FIG. 1 is a block diagram showing an embodiment of an electronic musical instrument according to the present invention. FIG. 2 is a diagram showing a chord progression data table. FIG. 3 is a diagram showing chord progression data. FIG. 4 is a diagram showing a chord pitch function table. FIG. 5 is a diagram showing a code classification table. FIG. 6 is a diagram showing a screen displayed on the display. FIG. 7 is a diagram showing transposed chord progression data. FIG. 8 is a diagram showing a screen showing transposed chord progression data.

Explanation of symbols

1: Electronic musical instrument 2: Electronic instrument body 3: Setting input device 5: Display 6: Accompaniment keyboard 7: Performance keyboard 8: Speaker 11: Chord progression database 12: Setting unit 13: Chord progression conversion unit 14: Chord progression Display unit 15: Automatic accompaniment unit 16: Performance unit 21: Chord progression data table 22: Song title 23: Key 24: Tempo 25: Chord progression pattern 26: Melody 31: Chord progression data 32: Timing 33: Chord 34: Pitch 35: Basic code 36: Extended chord 41: Chord pitch function table 43: Pitch 44: Frequency 45: Chord 51: Chord classification table 52: Extended chord 53: Basic chord 61: Screen 62: Chord progress display column 63: Melody display column 71: Chord progression data 72: timing 73: chord 74: pitch 7 5: Basic code 76: Extended code 81: Screen 82: Chord progress display field 83: Melody display field

Claims (9)

A chord progression database for recording a first chord progression indicating a permutation formed from a plurality of chords;
A chord progression converter for transposing the first chord progression into a second chord progression;
A chord progression display unit for displaying the second chord progression on a display;
An electronic musical instrument comprising: an automatic accompaniment unit that automatically accompanies an accompaniment pattern corresponding to a chord corresponding to a key that is pressed on an accompaniment keyboard. In claim 1,
The chord progression converting unit transposes the first chord progression to the second chord progression so that a key corresponding to the second chord progression becomes a predetermined key. In claim 2,
The chord progression converting unit transposes the first chord progression into the second chord progression so that the key corresponding to the second chord progression is in C major or A minor. In claim 1,
The number of chords including a sound to which a sharp or flat sound is added among the chords constituting the second chord progression is the chord including a sound to which a sharp or flat sound is added among the chords constituting the first chord progression. Less than the number of electronic musical instruments. In any one of Claims 1-4,
An electronic musical instrument in which the number of chords constituting the second chord progression is smaller than the chord types constituting the first chord progression. In claim 5,
The type of the chord constituting the second chord progression is any one of a major chord, a minor chord, a dominant 7th chord, a minor 7th chord, a minor 7th (♭ 5) chord, and a diminished 7th chord. In any one of Claims 1-6,
The chord progression database records the first melody,
The chord progression conversion unit transposes the first melody to a second melody,
The chord progression display unit is an electronic musical instrument that displays a part of the second melody on the display. In any one of Claims 1-7,
An electronic musical instrument in which a pitch of the accompaniment pattern with respect to a chord corresponding to the key is equal to a pitch of the first chord progression with respect to the second chord progression. A chord progression database for recording a first chord progression indicating a permutation formed from a plurality of chords;
A chord progression display unit for displaying a pitch of the plurality of chords with respect to a key corresponding to the first chord progression;
An electronic musical instrument comprising: an automatic accompaniment unit that automatically accompanies an accompaniment pattern corresponding to a chord corresponding to a key that is pressed on an accompaniment keyboard.

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