JP2006258938A - Automatic performance apparatus and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform automatic performance without sense of incongruity by determining the pitch of performance information for play-back so that the pitch is suitable for a string instrument in the case of the automatic performance based on the performance information. <P>SOLUTION: The note number 30 among an accompaniment pattern data PD(g) composed of an SMF format and created dedicatedly for a six-stringed guitar is constituted of string information 31 and position information 32. The string information 31 specifies which string (one) of the 1st through the 6th strings of the guitar should be plunked, and the position information 32 specifies one of two or more pitches which can be plunked with the string specified by the string information 31. In the case of a chord pattern matching mode, a pitch in accordance with a combination of the string information 31 and the position information 32 is determined with reference to a pitch conversion table for guitar corresponding to an input code inputted in the code key area. Then, a play-back data is produced at the determined pitch and is processed to generate sound. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an automatic performance apparatus and program for performing automatic performance by determining a pitch based on performance information such as accompaniment pattern data and a specified chord.

  Conventionally, as shown in Patent Document 1 below, the pitch of automatic performance information such as accompaniment pattern data is converted based on a specified chord, and automatic accompaniment or the like is converted based on the performance information converted to the pitch. An automatic performance apparatus that performs automatic performance is known.

  Here, the accompaniment pattern data is generally composed of a set of pitch data corresponding to the pitch of each accompaniment sound and timing data indicating the sounding timing. As the pitch data, a key code based on a predetermined chord such as CMaj (C major) is used.

For example, at the time of automatic accompaniment, the accompaniment pattern data is transposed according to the chord designated by the left key range split on the keyboard or the like. That is, each pitch of the accompaniment pattern data is shifted (including turning) according to the root tone of the designated chord to generate an accompaniment tone having a pitch that matches the designated chord.
JP 2001-51681 A

  However, such a conversion method mainly considers accompaniment by a keyboard, and usually does not consider accompaniment by a stringed instrument such as a guitar. For example, in a guitar, there are a plurality of positions (inversions) at which the same pitch or chord can be generated depending on the combination of the positions of strings and frets. Therefore, as described above, it is often not appropriate to simply shift the pitches of the accompaniment pattern data.

  Therefore, in order to create a natural flow in accompaniment using a guitar, it is conceivable to consider a pitch converted immediately before when performing pitch conversion of accompaniment pattern data.

  FIGS. 8A and 8B show the pitches on the guitar fret. It is assumed that accompaniment pattern data is created with a key code of CMaj. As an example of a possible guitar conversion rule, it is assumed that the pitch generated by each string is a constituent sound of the specified chord and is close to the pitch generated immediately before each string. However, it is assumed that the root tone is maintained as the lowest tone.

  In the guitar conversion rule, if the designated code is designated as CMaj, for example, the pitches C2, G2, C3, E3, and G3 are each converted to the same pitch as the original pitch. That is, the pitch is not substantially converted. If the converted pitch is pronounced on a live guitar, the fifth to first strings are responsible for the pronunciation of pitches C2, G2, C3, E3, and G3, respectively, as shown in FIG. Will do. Note that the sixth string is muted and there is no assigned sound.

  If the designation code is CMaj and the designation code is designated as E ♭ m7 (9) (E flat minor seventh nines), for example, pitches C2, G2, C3, E3, G3 are These are converted into pitches E 2, G 2, D 3, F 3, and G 3 as shown in FIG.

  Of these, in order to produce both the converted pitch F3 and pitch G ♭ 3 on an actual guitar, it is not possible to produce two sounds simultaneously with the second string alone. F3 is sounded by the second string, and pitch G ♭ 3 is sounded by the first string (see FIG. 5B).

  However, according to the guitar conversion rule as described above, depending on the designated code, it is predicted that voicing corresponding to a pressing method which is not normally used or is impossible is expected.

  Specifically, both pitches of the pitch F3 and the pitch G 半 3 have a semitone relationship, but two pitches having such a semitone relationship, in particular, when these are two sounds on the high pitch side, Since simultaneous sounding is not normally performed in actual guitar performances, if these pitches are pronounced as chords or arpeggios as automatic accompaniment, they will sound uncomfortable to the ears of guitar experts. It will be.

  In addition to this, there is a case where it is impossible to press down the pitch group after conversion because the finger does not reach the actual guitar.

  Such voicing is not musically mistaken, but when performing automatic accompaniment with a stringed instrument such as a guitar, as the sound quality of the automatic performance device improves, there is a risk that the unnatural feeling due to unnatural voicing will increase. is there.

  The present invention has been made to solve the above-described problems of the prior art, and its purpose is to determine the pitch of the performance information for reproduction so that it is suitable for a stringed instrument during automatic performance based on performance information, and to feel uncomfortable. It is an object of the present invention to provide an automatic performance apparatus and program capable of performing no automatic performance.

  In order to achieve the above object, an automatic performance apparatus according to claim 1 of the present invention is a performance information storage means for storing performance information (PD (g), SD (g)) having a plurality of pronunciation instruction information (23). 8, 12), reading means (7) for reading performance information stored in the performance information storage means, chord designation means (1) for designating chords, performance information read by the reading means, Reproduction performance information generating means (7) for determining the pitch of the reproduction performance information based on the chord designated by the chord designation means and generating the reproduction performance information at the determined pitch; Sound generation processing means (7) for performing sound generation processing based on the reproduction performance information generated by the reproduction performance information generation means, and the performance information stored in the performance information storage means is for each sound generation instruction information. , String music String information (31) designating one of the plurality of strings, and accompanying information (32) that accompanies the string information and defines one of a plurality of pitches that can be generated by the string specified by the string information The playback performance information generating means determines the pitch of the playback performance information based on string information and accompanying information in the read performance information. And

  Preferably, the performance information is created exclusively for stringed instruments in a MIDI format having note number information, and the playback performance information generating means is based on performance information in MIDI formats other than dedicated for stringed instruments. The playback performance information generating means generates note number information in the performance information only when the playback performance information is generated based on the performance information created exclusively for the stringed instrument. The pitch (33) and the octave (34) defined in (30) are interpreted as the string information and the accompanying information to determine the pitch of the performance information for reproduction (claim 2).

  In order to achieve the above object, an automatic performance program according to claim 3 of the present invention is a read step for reading the performance information from a performance information storage device storing performance information having a plurality of pronunciation instruction information, and a code for designating a code. The pitch of the playback performance information is determined based on the specification step, the performance information read in the reading step, and the chord specified in the chord specification step, and the playback performance is determined with the determined pitch. An automatic performance program for causing a computer to execute a reproduction performance information generation step for generating information and a sound generation processing step for performing sound generation processing based on the reproduction performance information generated by the reproduction performance information generation step, The performance information stored in the performance information storage device is one of a plurality of strings of the stringed instrument for each pronunciation instruction information. The playback performance includes: string information for designating a string; and accompanying information for defining one of a plurality of pitches that accompany the string information and can be generated by the string specified by the string information. The information generating step determines a pitch of the reproduction performance information based on the string information and the accompanying information in the read performance information.

  A computer-readable storage medium storing the program according to claim 3 constitutes the present invention.

  According to the present invention, at the time of automatic performance based on performance information, the pitch of the reproduction performance information can be determined so as to be suitable for a stringed instrument, and automatic performance without a sense of incongruity can be performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an automatic performance device according to an embodiment of the present invention. FIG. 2 is a plan view of the automatic performance device of the present embodiment.

  As shown in FIG. 2, the automatic performance device 50 of the present embodiment is configured as an electronic keyboard instrument, for example. As shown in FIG. 1, the automatic performance device 50 inputs a keyboard 1 (see FIG. 2) for inputting pitch information, a multi-pad 2 (see FIG. 2) composed of a plurality of pads, and various information. A panel operation element 3 composed of a plurality of operation elements, a key depression detection circuit 4 for detecting a key depression state of each key of the keyboard 1, and an operation state detection circuit 5 for detecting an operation state of each pad of the multipad 2. An operation state detection circuit 6 that detects the operation state of each operation member of the panel operation member 2, a CPU 7 that controls the entire automatic performance device 50, a control program executed by the CPU 7, various table data, and various accompaniment styles. ROM 8 for storing data, RAM 9 for temporarily storing automatic performance data, various input information, calculation results, etc., timer 10 for measuring interrupt time and various times in timer interrupt processing, A display device 11 having an LCD display and a light emitting diode (LED) for displaying information, etc., an external storage device 12 for storing various application programs including the control program, automatic performance data, various data, etc., and an external MIDI ( Musical Instrument Digital Interface) An external control device 100 such as a device is connected, and a communication interface (I / F) 13 that transmits / receives data to / from the external control device 100, performance data input from the keyboard 1, and multi-pad 2 A tone generator circuit 14 that converts performance data assigned to each pad, preset performance data, etc. into a musical tone signal, an effect circuit 15 for applying various effects to the musical tone signal from the tone generator circuit 14, and the effect A musical sound signal from the circuit 15 is converted into sound, for example, a DAC (Digital-to-Analog Converter) or an amplifier It is constituted by a sound system 16 such as a speaker.

  The components 4 to 15 are connected to each other via a bus 17, the timer 10 is connected to the CPU 7, the external control device 100 is connected to the communication I / F 13, and the effect circuit 15 is connected to the sound source circuit 14. A sound system 16 is connected to the effect circuit 15.

  Examples of the external storage device 12 include a flexible disk drive (FDD), a hard disk drive (HDD), a CD-ROM drive, and a magneto-optical disk (MO) drive. As described above, the external storage device 12 can also store a control program executed by the CPU 7. If the ROM 8 does not store a control program, the external storage device 12 stores the control program. By reading it into the RAM 9, it is possible to cause the CPU 7 to perform the same operation as when the control program is stored in the ROM 8. In this way, control programs can be easily added and upgraded.

  Although the external control device 100 is directly connected to the communication I / F 13, the present invention is not limited to this, and a server computer is connected via a communication network such as a LAN (Local Area Network), the Internet, or a telephone line. You may do it. In this case, if the above programs and various parameters are not stored in the external storage device 12, the communication I / F 13 is used to download the programs and parameters from the server computer. A computer serving as a client (automatic performance device 50 in the present embodiment) transmits a command for requesting downloading of a program and parameters to a server computer via communication I / F 13 and a communication network. Upon receiving this command, the server computer distributes the requested program or parameter to the computer via the communication network, and the computer receives the program or parameter via the communication I / F 13 to receive the external storage device 12. Downloading is completed by accumulating in.

  As can be seen from the above-described configuration, the automatic performance device 50 according to the present embodiment is constructed on an electronic keyboard instrument that includes a keyboard and a multipad. May be constructed on a general-purpose personal computer connected externally.

  Further, the automatic performance device 50 has a key range division (split) function, and can divide the key range into two at the split point SP as shown in FIG. In the chord key range on the left side of the split point SP, chords (chords) can be input mainly with the left hand, and in the performance key range on the right side of the split point SP, manual play such as a melody can be performed mainly with the right hand. it can.

  FIG. 3 is a diagram showing an example of the format of accompaniment pattern data used for automatic accompaniment in the present embodiment. The accompaniment pattern data PD is, for example, short accompaniment data for one phrase, and it is possible to perform automatic accompaniment by repeatedly reproducing the accompaniment pattern data PD. Further, in the present embodiment, among the accompaniment pattern data PD, data created exclusively for a 6-string guitar is particularly referred to as accompaniment pattern data PD (g).

  As shown in the figure, the accompaniment pattern data PD includes header data 21, a sequence of timing data 22 and performance data 23, and end data 24. The header data 21 is data located at the beginning of the accompaniment pattern data PD. The header data 21 stores information indicating whether the accompaniment pattern data PD is dedicated to the guitar (PD (g)), in addition to the name, tempo, timbre, etc. of the music or pattern. The timing data 22 is data that defines the playback timing of the performance data 23 located immediately after the timing data 22. The performance data 23 is data for instructing automatic performance. The end data 24 is data indicating the end of the accompaniment pattern data PD.

  The performance data 23 is composed of a note number 30, a duration 35 indicating the duration of sound generation, a velocity 36 indicating the sound intensity, and other data 37. In the present embodiment, accompaniment pattern data PD is created based on CMaj (C major).

  Here, the accompaniment pattern data PD is configured in an SMF (Standard Midi File) format, and the note number 30 normally defines a pitch by a pitch name and an octave. That is, the note number 30 in the accompaniment pattern data PD other than the accompaniment pattern data PD (g) has a pitch value 33 (for example, “C”) and an octave 34 (for example, for example) as shown in FIG. "2") is defined, and thereby, for example, the pitch C2 is defined.

  In the accompaniment pattern data PD (g) used in the present embodiment, the configuration of the note number 30 is exactly the same as that of the normal accompaniment pattern data PD. However, the interpretation of the note number 30 is different when it is played back (automatic accompaniment). In the accompaniment pattern data PD (g), the note number 30 is substantially not interpreted as normal pitch information, Information corresponding to the pitch name 33 is interpreted as string information 31, and information corresponding to the octave 34 is interpreted as position information 32.

  Here, the string information 31 is information defining which string (one) of the first to sixth strings of the guitar should be pronounced. In one string of the guitar, the pitch is determined by the fret position, but the position information 32 is information that defines one of a plurality of pitches that can be generated by the string defined by the string information 31. For example, if the note number 30 defines the pitch C2, the pitch name “C” is interpreted as the string information 31 to define the string to be pronounced, and the octave “2” is The position information 32 is interpreted to define the fret position, that is, the pitch on the defined string. Therefore, in the accompaniment pattern data PD (g), “C2”, “E3”, etc., which are combinations of the string information 31 and the position information 32, have no meaning as pitches.

  In this embodiment, automatic accompaniment can be performed not only with the accompaniment pattern data PD but also with the accompaniment style data SD. However, the accompaniment style data SD is also accompaniment data, and its data format is also accompaniment pattern data. It is the same as that of PD. As for the accompaniment style data SD, the one prepared exclusively for the 6-string guitar is particularly referred to as accompaniment style data SD (g). In the accompaniment style data SD, the interpretation of the note number 30 differs between the accompaniment style data SD and the accompaniment style data SD (g), just as in the case of the accompaniment pattern data PD.

  FIG. 4 is a conceptual diagram showing an example of a pitch conversion table for guitar. The pitch conversion table for guitar is prepared for each chord. The figure (a) is the CMaj chord, and the figure (b) is the sound for E ♭ m7 (9) (E flat minor seventh nines). Each of the high conversion tables is shown. In addition, a large number of tables for each code are created, and a table group as a set of these is stored in the ROM 8, for example.

  As shown in FIG. 6A, the pitch conversion table for guitar is configured such that one pitch is defined by the string information 31 and the position information 32. The string information 31 “D, E, F, G, A, B” specifies that the sixth, fifth, fourth, third, second, and first strings are sounded, respectively. On the other hand, the position information 32 “2 (C2-B2), 3 (C3-B3), 4 (C4-B4), 5 (C5-B5)” defines the positions pos1, pos2, pos3, and pos4, respectively. .

  In a six-string guitar, there are a plurality of positions where the same pitch or chord can be generated depending on the combination of the position of the string and the fret. Each of the positions pos is set in advance so that the fret can be actually pressed by the guitar and the pitch of the constituents is a natural voicing like a guitar. For example, in the example of FIG. 4B, any of the positions pos1 to pos4 is natural voicing of the E ♭ m7 (9) code. In FIGS. 4A and 4B, “x” indicates mute (no sound is generated).

  As described above, the accompaniment pattern data PD (g) and the accompaniment style data SD (g) are both created with information indicating which string is to be sounded at which position and how the note number is generated. 30 corresponds to, for example, the sixth, fifth, fourth, third, second, and first strings, respectively, “D2 to D5, E2 to E5, F2 to F5, G2 to G5, A2 to A5, B2-B5 "is set.

  On the other hand, which chord to use for pitch conversion in the pitch conversion table for guitars is determined by the chord (hereinafter referred to as “input”) that is sequentially input (designated) in the chord range of the keyboard 1 (see FIG. 2). Code)). To give some examples, for example, when a CMaj chord is input, a pitch conversion table for guitar for CMaj chord (FIG. 4A) is used, string information 31 is “F”, position information 32 On the basis of the performance data 23 with “3”, the pitch G2 is determined as the converted pitch. When E ♭ m7 (9) chord is input, the guitar pitch conversion table (Fig. 4 (b)) for E ♭ m7 (9) chord is used, string information 31 is "F", position information Based on the performance data 23 in which 32 is “3”, the pitch G 音 2 is determined as the converted pitch.

  In the present embodiment, the automatic accompaniment using the multi-pad 2 and the automatic accompaniment using the accompaniment style can be performed simultaneously.

  In the automatic accompaniment using the multipad 2, the accompaniment pattern data PD is assigned to each pad of the multipad 2, and when the user presses a desired pad, the accompaniment pattern data PD assigned thereto is read. The automatic accompaniment is performed based on the accompaniment pattern data PD. Each of the pads can be assigned any of the ready-made accompaniment pattern data, the edited version of the ready-made accompaniment pattern data, and the post-created one by the user. Furthermore, the accompaniment pattern data PD assigned to each pad can be made different according to the performance style, mode, etc., and a desired one of the accompaniment pattern data PD larger than the number of pads is practically used for assignment. You can choose.

  On the other hand, in the automatic accompaniment using the accompaniment style, for example, the user selects one from a plurality of types of accompaniment style data SD stored in the ROM 8 or the external storage device 12, and a playback start button (not shown) on the panel operator 2 is shown. )) To enable the pitch conversion function in automatic accompaniment using the accompaniment style. Then, the selected accompaniment style data SD is read out, and automatic accompaniment is performed based on it. The accompaniment style data SD includes any of ready-made items, edited versions of ready-made items, and items created afterwards by the user.

  As for the accompaniment pattern data PD and the accompaniment style data SD, ready-made ones are stored in the ROM 8, and edited or created later are stored in the external storage device 12. In addition, song data (not shown) is also stored in the ROM 8. Hereinafter, these data are collectively referred to as “automatic performance data”. In automatic accompaniment, a plurality of accompaniment pattern data PD can be reproduced in parallel, and automatic accompaniment based on accompaniment pattern data PD can be performed in parallel with automatic accompaniment based on accompaniment style data SD.

  During automatic accompaniment, the chord match mode can be set by a mode operator (not shown) of the panel operator 3. In this chord match mode, it is possible to input chords by key division, and automatic accompaniment sounds based on accompaniment pattern data PD (g) and accompaniment style data SD (g) 4 (a) and 4 (b) are uttered at a pitch determined with reference to the pitch conversion table for guitar.

  Even in the chord match mode, the automatic accompaniment sound based on the accompaniment pattern data PD and the accompaniment style data SD that are not dedicated to the guitar is sounded using the pitch conversion table stored separately from the guitar pitch conversion table. Although this is highly converted, this method is the same as the conventional method. Depending on the types of accompaniment pattern data PD and accompaniment style data SD, some pitches cannot be converted. However, in automatic accompaniment based on these, even if chord input is performed, the pitch of the automatic accompaniment sound is not changed.

  FIG. 5 is a flowchart of the main process. This process is started when the power is turned on. First, after initialization processing such as clearing of the RAM 9 is performed (step S101), panel setting processing is executed, that is, operation of the panel operator 2 and the multipad 2 is accepted, and processing such as device setting is executed (step S101). S102). Then, an automatic performance process (subroutine) shown in FIG. 6 described later is executed (step S103), and a sound generation process is executed (step S104). Thereafter, the process returns to step S102.

  In the sound generation process in step S104, for example, the reproduction data (reproduction performance information) generated in step S103 (FIG. 6) is read, and the set effect process is added to the performance signal generated based on the reproduction data. Amplify and output. In addition, the performance signal based on the manual performance of the keyboard 1 by the user is also reproduced in parallel or independently.

  FIG. 6 is a flowchart of the automatic performance process executed in step S103 of FIG. First, it is determined whether or not the code match mode is set (step S201). If it is set, it is determined whether or not a code is input in the code key area (step S202). Here, even if the key is pressed in the code key range, if it is in a key pressing state that does not hold as a code, it is determined that there is no code input. If the code match mode is not set or if no code is input even if it is set, the process proceeds to step S204. On the other hand, if a code is input, data indicating the input code is held. (Step S203), the process proceeds to Step S204.

  In step S204, it is determined whether or not the automatic performance is being executed. The automatic performance here includes not only the automatic accompaniment based on the accompaniment pattern data PD or the accompaniment style data SD but also the reproduction of song data. As a result of the determination, if the automatic performance is not being executed, this processing is terminated. If the automatic performance is being executed, the currently executed automatic performance data is read (step S205), and the read automatic performance data is read. It is determined whether or not there is data (performance data 23) to be sounded at the current timing (step S206). If there is no data to be sounded, this process is terminated. move on.

  In step S207, it is determined whether or not the chord match mode is set. If so, whether or not the data to be sounded at the current timing is either the accompaniment pattern data PD or the accompaniment style data SD. Is determined (step S208). If the chord match mode is not set or the data to be sounded at the current timing is neither the accompaniment pattern data PD nor the accompaniment style data SD (song data or the like) even if it is set, Without performing pitch conversion, reproduction data that is performance data for reproduction is generated based on the data (step S209), and the process proceeds to step S214.

  On the other hand, as a result of the determination in the step S208, if the data to be sounded at the current timing is the accompaniment pattern data PD or the accompaniment style data SD, it is determined whether or not the data is a guitar type conversion target (step S208). S210). Here, the guitar type conversion target is the above-described accompaniment pattern data PD (g) or accompaniment style data SD (g). As a result of the determination, if the data is not subject to guitar type conversion, the data is normal (not dedicated to guitar) accompaniment pattern data PD or accompaniment style data SD. With reference to the pitch conversion table stored separately, the pitch (note number 30) of the data is converted based on the input code defined by the held data and reproduced with the converted pitch. Business data is generated (step S211). Thereafter, the process proceeds to step S214.

  If the result of determination in step S210 is that the data is a guitar type conversion target (PD (g) or SD (g)), guitar type pitch conversion processing is executed (step S212). That is, the pitch corresponding to the combination of the string information 31 and the position information 32 in the note number 30 of the data is determined with reference to the guitar pitch conversion table (see FIG. 4) corresponding to the input chord.

  Here, as described above, in the accompaniment pattern data PD (g) or the accompaniment style data SD (g), the note number 30 does not have a meaning as a pitch in the data interpretation in the automatic accompaniment processing, and is generated. Since it is only used to determine the pitch of the data, the concept of “pitch conversion” is not strictly correct regarding the processing of step S212. However, since it is processing corresponding to the conventional pitch conversion method (step S211) in which the note number 30 is converted based on the input code, it is referred to as “guitar-type pitch conversion processing” for convenience. .

  Next, reproduction data is generated with the determined pitch (step S213), and the process proceeds to step S214. In step S214, it is determined whether or not there is other read automatic performance data that should be processed simultaneously at the current timing. If so, the process returns to step S207. If not, the process ends.

  The result of pitch conversion by the guitar-type pitch conversion processing in this embodiment will be compared with the conventional one. FIGS. 7A and 7B are diagrams showing pitches on the guitar fret.

  For example, if the accompaniment pattern data PD (g) corresponds to a stroke performance method using six strings, the accompaniment pattern data PD (g) has the note numbers 30 “D3, E3, F3, Six performance data 23 "G3, A3, B3" are continuous at very close timings. In the automatic performance execution of the accompaniment pattern data PD (g), if the input code is E ♭ m7, since the position information 32 is “3” for any performance data 23, FIG. Is determined as the pitch of the reproduction data. Therefore, in this case, as shown in FIG. 7A, the pitches E 2, G 2, D 3, F 3, and B 3 on the fifth to first strings are the reproduction data. Determined as pitch. The sound on the sixth string is not adopted and will be muted.

  When this is compared with the example of FIG. 8B, in the example of FIG. 8B, as described above, the pitch F3 and the pitch G ♭ 3 having a semitone relationship are adopted. However, in the example of FIG. 7A in the present embodiment, the pitch B ♭ 3 is adopted instead of the pitch G ♭ 3 in the first string, so the semitone relation is eliminated. This avoids an unnatural voicing that is not normally used or is not a guitar that corresponds to a pressing method that is not possible.

  Similarly, if the performance data 23 of the accompaniment pattern data PD (g) is a series of six pieces of performance data 23 each having “D4, E4, F4, G4, A4, B4”, The pitch in position pos3 shown in FIG. 4B is determined as the pitch of the reproduction data. Therefore, in this case, as shown in FIG. 7B, the pitches E 2, D 3, F 3, B 3 and D 4 on the fifth to first strings are the reproduction data. Determined as pitch. Again, this is a natural voicing used by guitar experts.

  According to the present embodiment, in the automatic performance, when the reproduction data is generated based on the read automatic performance data and the input code, the automatic performance data is the accompaniment pattern data PD (g) or the accompaniment style data SD (g). In this case, the pitch of the reproduction data to be generated is determined using the guitar pitch conversion table corresponding to the input code based on the string information 31 and the position information 32 in the note number 30. The In particular, the string information 31 defines one of the strings to be sounded, and the position information 32 defines one of a plurality of pitches that can be sounded by the string defined by the string information 31. On the other hand, a single tone pitch (or mute) always corresponds. Moreover, the pitch conversion table for guitar is a raw guitar such that, for example, note numbers 30 having the same position information 32 have less semitone relations between the highest sound and the next highest sound. It is set to be the pitch of each string when a chord is pressed. Therefore, there is no fear that the pitch of two or more pitches corresponds to one string, and the natural voicing suitable for the guitar can be realized. Therefore, in the case of automatic accompaniment based on automatic performance data, the pitch of the reproduction data can be determined so as to be suitable for guitar accompaniment, and automatic accompaniment with no sense of incongruity can be performed.

  The accompaniment pattern data PD and the accompaniment style data SD are created in the MIDI format, and only the accompaniment pattern data PD (g) and the accompaniment style data SD (g) created specifically for the guitar are used for their note numbers. 30 is not interpreted as pitch information, but is interpreted as a string to be sounded and a fret position on the string, and a pitch is determined using a pitch conversion table for guitar. Accordingly, the accompaniment pattern data PD (g) and accompaniment style data SD (g) dedicated to the guitar have basically the same structure as the normal automatic performance data, and therefore it is easy to perform automatic performance processing in parallel with them. It is. Further, since the accompaniment pattern data PD (g) and the like are configured in a ready-made data format, the configuration does not have to be complicated.

  Note that the automatic performance data dedicated to the guitar and to be reproduced by converting the pitch according to the input code corresponds to at least the string information 31 and the position information 32 attached to the string information 31. Any data having a structure having information may be used, and the data is not limited to MIDI format data such as the accompaniment pattern data PD (g) and the accompaniment style data SD (g).

  The automatic performance device 50 has a mode for performing automatic accompaniment dedicated to guitars. In this mode, only automatic performance data dedicated to guitars such as accompaniment pattern data PD (g) and accompaniment style data SD (g) are selected. If it is configured so that it cannot be performed, the header data 21 need not include data indicating a guitar-specific data.

  In this embodiment, the accompaniment pattern data PD (g) and the accompaniment style data SD (g) are dedicated to a six-string guitar. However, the present invention is not limited to this, and accompaniment pattern data for other stringed instruments such as a bass. A corresponding pitch conversion table may be created to realize automatic accompaniment with various stringed instrument sounds.

  Another object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the embodiments to a system or apparatus, and the computer (or CPU 7 or MPU) of the system or apparatus stores the storage medium. It is also achieved by reading out and executing the program code stored in. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

  Examples of the storage medium for supplying the program code include a floppy (registered trademark) disk, a hard disk, a magneto-optical disk, a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-RAM, and a DVD-RW. DVD + RW, magnetic tape, nonvolatile memory card, ROM, etc. can be used. Alternatively, the program code may be downloaded via a network.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) running on the computer based on the instruction of the program code. A case where part or all of the actual processing is performed and the functions of the above-described embodiments are realized by the processing is also included.

  Further, after the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. This includes a case where the CPU 7 or the like provided in the board or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.

It is a block diagram which shows schematic structure of the automatic performance apparatus which concerns on one embodiment of this invention. It is a top view of an automatic performance apparatus. It is a figure which shows an example of the format of accompaniment pattern data. It is a conceptual diagram which shows the example of the pitch conversion table for guitars. It is a flowchart of a main process. It is a flowchart of the automatic performance process performed by step S103 of FIG. It is the figure which showed the pitch on the fret of the guitar. It is the figure which showed the pitch on the fret of the guitar.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Keyboard (code designation means), 2 ... Multi pad, 7 ... CPU (reading means, performance information generation means for reproduction, sound generation processing means), 8 ... ROM (performance information storage means), 12 ... External storage device (performance (Information storage means), 23 ... performance data (sound generation instruction information), 30 ... note number (note number information), 31 ... string information, 32 ... position information (accompanying information), 33 ... pitch name, 34 ... octave, 50 ... Automatic performance device, PD (g) ... Accompaniment pattern data (performance information), SD (g) ... Accompaniment style data (performance information)

Claims (3)

Performance information storage means for storing performance information having a plurality of pronunciation instruction information;
Reading means for reading performance information stored in the performance information storage means;
Code specifying means for specifying a code;
Based on the performance information read by the reading means and the chord designated by the chord designation means, the pitch of the playing performance information is determined, and the playing performance information is generated with the determined pitch. Playing performance information generating means;
Sound generation processing means for performing sound generation processing based on the reproduction performance information generated by the reproduction performance information generation means,
The performance information stored in the performance information storage means includes, for each sound generation instruction information, string information for designating one string among a plurality of strings of a stringed instrument, and a string designated by the string information attached to the string information. The reproduction performance information generation means is based on the string information and the accompanying information in the read performance information. An automatic performance apparatus for determining a pitch of the reproduction performance information.   The performance information is created exclusively for stringed instruments in a MIDI format having note number information, and the playback performance information generating means generates playback performance information based on performance information in a MIDI format other than dedicated for stringed instruments. The reproduction performance information generating means is defined by the note number information in the performance information only when the reproduction performance information is generated based on performance information created exclusively for the stringed instrument. 2. The automatic performance apparatus according to claim 1, wherein a pitch of the reproduction performance information is determined by interpreting a pitch name and an octave as the string information and the accompanying information. A step of reading out the performance information from a performance information storage device storing performance information having a plurality of pronunciation instruction information;
A code specifying step for specifying a code;
Based on the performance information read in the reading step and the chord designated in the chord designation step, the pitch of the reproduction performance information is determined, and the reproduction performance information is generated with the determined pitch. Playing performance information generation step,
An automatic performance program for causing a computer to execute a sound generation processing step for performing sound generation processing based on the reproduction performance information generated by the reproduction performance information generation step,
The performance information stored in the performance information storage device includes, for each sound generation instruction information, string information for designating one string among a plurality of strings of a stringed instrument, and a string designated by the string information attached to the string information. And the playback performance information generation step is based on the string information and the accompanying information in the read performance information. An automatic performance program for determining a pitch of the performance information for reproduction.

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