JP3823723B2 - Available note scale determination device and storage medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an available note scale determining apparatus and a storage medium for determining an available note scale suitable for each chord constituting an input chord progression.
[0002]
[Prior art]
Conventionally, as a melody generating device, desired key information and desired chord information are input, an available note scale is detected based on the key information and chord information, and a sound in the AVNS related to the detection is melodies. The same applicant as this application has proposed that a melody is generated by selecting it as a sound (Japanese Patent Application No. 10-166302). According to such a melody generating device, a natural melody suitable for non-diatonic chords can be generated.
[0003]
[Problems to be solved by the invention]
In general, the available note scale is not limited to one corresponding to one key and one chord, and there may be a plurality of available note scales. In the above-described prior art, one available note scale is detected each time one chord is given for each key in the available note scale detection process, so one key and one chord are supported. When there are a plurality of available note scales, an available note scale that is not preferable for melody generation may be detected among the plurality of AVNS. For this reason, when a melody is generated based on AVNS related to detection, the suitability of the melody with respect to chord progression may not be good.
[0004]
Although it is possible to detect the available note scale based on the key and the chord, it is difficult to automatically detect the key from the chord progression. In other words, if the chord progression is typical, the key can be automatically detected relatively easily. However, if the key is transposed in the middle of the chord progression, it is not easy to automatically detect the key modulation. If the chord progression is not correct, it is difficult to detect the modulation. For this reason, it is difficult to determine an available note scale suitable for the chord.
[0005]
The present invention has been made paying attention to this point, and provides an available note scale determining device and a storage medium capable of determining an available note scale suitable for a chord without detecting modulation. For the purpose.
[0006]
[Means for Solving the Problems]
[0010]
  To achieve the above objective,Claim1The available note scale determination device described inData and key dataInput means for inputting, and the input chord progressionThe chord progression data based on the data and the key dataDiscriminating means for discriminating whether the code constituting the code is a diatonic code or a non-diatonic codeAnd saidInput chord progressiondataThe available note scale of the target code for which the available note scale is determinedDecideDetermination methodBecauseThe determination unit determines that the target code is a diatonic code.If it is, the discrimination means is located immediately before the target code.When the immediately preceding chord is identified as a diatonic chord, the available note scale of that chord is determined as the diatonic note scale.The available note scale of the target code is determined by the first determination methodAndBy the discrimination means,The immediately preceding code is identified as a non-diatonic codeLocated immediately after the target codeImmediately after codeIs daDetermined as Iatonic codeWhenThe available note scale of the target code is determined to be a diatonic note scale.SaidA first determination method and an available note scale of the target code as the immediately preceding code and the immediately following code;Each component soundA second determination method that is determined based on the code is randomly selected, and the available note scale of the target code is determined using the selected determination methodWhen both the immediately preceding chord and the immediately following chord are determined to be non-diatonic chords by the discriminating unit, the available note scale of the target chord is determined by the second determining method, and the discrimination is performed. When the object code is determined to be a non-diatonic code by means, the available note scale of the object code is determined by the second determination method.It is characterized by that.
  Here, there is a case where the immediately preceding chord or the immediately following chord does not exist. In this case, for example, if a key is attached to the input chord progression, the tonic chord of this key may be used as the substitute chord. (Hereinafter, the same applies even if the claims change.)
[0014]
  Claim2The storage medium described inEnterForced chord progressionThe chord progression data based on the data and the key dataDiscriminating module that discriminates whether the code that constitutes a diatonic code or non-diatonic codeAnd saidInput chord progressiondataThe available note scale of the target code for which the available note scale is determinedDecideDecision module to be determinedBecauseThe target code is determined as a diatonic code by the determination module.The identification code is located immediately before the target code.When the immediately preceding chord is identified as a diatonic chord, the available note scale of that chord is determined as the diatonic note scale.The available note scale of the target code is determined by the first determination methodAndBy the discrimination module,The immediately preceding code is identified as a non-diatonic codeLocated immediately after the target codeImmediately after codeIs daDetermined as Iatonic codeWhenThe available note scale of the target code is determined to be a diatonic note scale.SaidA first determination method and an available note scale of the target code as the immediately preceding code and the immediately following code;Each component soundA second determination method that is determined based on the code is randomly selected, and the available note scale of the target code is determined using the selected determination methodWhen both the immediately preceding chord and the immediately following chord are determined to be non-diatonic chords by the discriminating module, the available note scale of the target chord is determined by the second determining method, and the discrimination is performed. When the module determines that the target code is a non-diatonic code, a program that can be realized by a computer is stored, including determining the available note scale of the target code by the second determination method.It is characterized by that.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
FIG. 1 is a block diagram showing a schematic configuration of an available note scale (hereinafter referred to as “AVNS”) determination apparatus according to an embodiment of the present invention.
[0017]
As shown in the figure, the AVNS determination device of this embodiment includes a keyboard device 1 for inputting pitch information, a panel switch 2 having a plurality of switches for inputting various information, and a keyboard device. The key pressing detection circuit 3 that detects the key pressing state of each key 1, the switch detection circuit 4 that detects the pressing state of each switch of the panel switch 2, the CPU 5 that controls the entire apparatus, and the CPU 5 execute ROM 6 for storing control programs and various table data, RAM 7 for temporarily storing performance data, various input information, calculation results, etc., timer 8 for measuring interrupt times and various times in timer interrupt processing, For displaying information etc., for example, equipped with large liquid crystal display (LCD) or CRT (Cathode Ray Tube) display and light emitting diode (LED) A display device 9, a floppy disk drive (FDD) 10 that drives a floppy disk (FD) 20 as a storage medium, and a hard disk (not shown) that stores various application programs including the control program and various data. A hard disk drive (HDD) 11 for driving and a CD-ROM drive (CD-ROMD) for driving a compact disk-read only memory (CD-ROM) 21 for storing various application programs including the control program and various data. ) 12, a MIDI interface (I / F) 13 for inputting an external MIDI (Musical Instrument Digital Interface) signal and outputting a MIDI signal to the outside, and the communication network 101, for example, a server computer. A communication interface (I / F) 14 for transmitting / receiving data to / from the computer 102, a tone generator circuit 15 for converting performance data input from the keyboard device 1, preset performance data, and the like into musical tone signals, and the tone generator circuit 15 Effect circuit 16 for imparting various effects to the music signal from the sound, and a sound system such as a DAC (Digital-to-Analog Converter), amplifier, speaker, etc. for converting the sound signal from the effect circuit 16 into sound 17.
[0018]
The above components 3 to 16 are connected to each other via a bus 18, a timer 8 is connected to the CPU 5, another MIDI device 100 is connected to the MID II / F 13, and a communication network 101 is connected to the communication I / F 14. Are connected to the sound source circuit 15, and a sound system 17 is connected to the effect circuit 16.
[0019]
As described above, the hard disk of the HDD 11 can also store the control program executed by the CPU 5. When the control program is not stored in the ROM 6, the control program is stored in the hard disk and is read into the RAM 7. Thus, the CPU 5 can be caused to perform the same operation as when the control program is stored in the ROM 6. In this way, control programs can be easily added and upgraded.
[0020]
The control program and various data read from the CD-ROM 21 of the CD-ROM drive 12 are stored in the hard disk in the HDD 11. As a result, a new installation or version upgrade of the control program can be easily performed. In addition to the CD-ROM drive 12, a device for using various types of media such as a magneto-optical disk (MO) device may be provided as an external storage device.
[0021]
The MIDII / F 13 is not limited to a dedicated one, and may be configured by a general-purpose interface such as RS-232C, USB (Universal Serial Bus), IEEE 1394 (I Triple 1394), or the like. In this case, data other than MIDI messages may be transmitted and received simultaneously.
[0022]
As described above, the communication I / F 14 is connected to a wired or wireless communication network 101 such as a LAN (Local Area Network), the Internet, or a telephone line, and is connected to the server computer 102 via the communication network 101. Connected. When the above programs and various parameters are not stored in the hard disk in the HDD 11, the communication I / F 14 is used to download programs and parameters from the server computer 102. A computer serving as a client (in this embodiment, an AVNS determination device) transmits a command requesting download of a program and parameters to the server computer 102 via the communication I / F 14 and the communication network 101. Upon receiving this command, the server computer 102 distributes the requested program and parameters to the computer via the communication network 101, and the computer receives these programs and parameters via the communication I / F 14 and receives them in the HDD 11. Downloading is completed by accumulating on the hard disk.
[0023]
In addition, an interface for directly exchanging data with an external computer or the like may be provided.
[0024]
The AVNS determination apparatus according to the present embodiment is constructed on a general-purpose personal computer as can be seen from the above-described configuration, but is not limited to this, and only from the minimum elements that can implement the present invention. You may construct | assemble on the comprised dedicated apparatus, an electronic musical instrument, and a portable communication terminal.
[0025]
The control process executed by the AVNS determination apparatus configured as described above will be first described in outline, and then described in detail with reference to FIGS.
[0026]
  The AVNS determination apparatus according to the present embodiment determines the AVNS of each chord constituting the input chord progression as follows. That is, if a code for which AVNS is to be determined (hereinafter referred to as “target code”) is “Y”, and the code immediately before and after that is “X” and “Z”, respectively,
(1) Y: In the case of a non-diatonic code, Y's AVNS is replaced by its front and rear codes, that is, X andZDetermine based on
(2) Y: In the case of diatonic chords,
  (A) In the case of X: diatonic chord; Z: diatonic chord, AVNS of Y is determined as diatonic note scale
  (B) In the case of X: diatonic chord; Z: non-diatonic chord, the AVNS of Y is determined as the diatonic note scale.
  (C) In the case of X: non-diatonic chord; Z: diatonic chord, AVNS of Y is determined to be a diatonic note scale, or determined in the same manner as in (1) above.
  (D) In the case of X: non-diatonic code; Z: non-diatonic code, Y AVNS is determined by the same method as in (1) above.
[0027]
Here, the diatonic note scale is a scale composed only of a scale tone, that is, a diatonic note.
[0028]
Next, this control process will be described in detail.
[0029]
FIG. 2 is a flowchart showing the procedure of the AVNS determination process executed by the AVNS determination apparatus according to the present embodiment, particularly the CPU 5. The AVNS determination process shown in the figure is a rewrite of each process described in the above outline into a flowchart format.
[0030]
That is, the process of step S2 corresponds to the process of (1), the process of step S4 corresponds to the processes of (2) (a) and (b), and the process of step S6 is the above (2) (c ), And the process in step S7 corresponds to the processes (2) and (d).
[0031]
Note that the process of step S6 is merely a specific example of the processes (2) and (c). That is, in step S6, it is determined at random whether AVNS is determined using the AVNS determination process based on the preceding and following codes or the diatonic note scale, and the determined process is performed. However, the present invention is not limited to this, and either one may be fixedly determined and the determined process may be performed.
[0032]
Next, the processes of steps S2 and S7 (and a part of step S6), that is, the process of determining the AVNS of the target code based on the code located immediately before and immediately after it (AVNS determination process based on the preceding and following codes) explain.
[0033]
First, an overview of AVNS determination processing based on the preceding and following codes will be described with reference to FIG. The storage units 7P, 7Q, 7R, 7S, and 7T all belong to the RAM 7 of FIG. 1, and store chord progression data, target code data, pre-code data, post-code data, and key data, respectively. The chord progression data includes, for example, a plurality of chord data that respectively designate a plurality of chords constituting the chord progression for one song, and is acquired together with the tone data that designates the tone of the song.
[0034]
The key data and chord progression data can be obtained by, for example, a method in which the user selects chord progression data with desired tone data from a chord progression database provided in the ROM 6 or the HDD 11, and the user uses the keyboard 1, the panel switch 2, or the like. A method of inputting desired tone data and chord progression data, a method of automatically generating chord progression data with tone data in accordance with a user instruction, and the like can be used. Of the key data and chord progression data acquired by any method, the key data is stored in the storage unit 7T, and the chord progression data is stored in the storage unit 7P. The storage unit 7P can store scale data indicating AVNS corresponding to each piece of code data constituting the chord progression data.
[0035]
In the AVNS determination processing 120 based on the preceding and following codes, an AVNS for the code indicated by the code data is determined for each code data constituting the chord progression data stored in the storage unit 7P, and the AVNS related to the determination is determined for each code data Is stored in the storage unit 7P in association with the scale data ASD. In determining AVNS, code data for which AVNS is to be determined is read from the storage unit 7P and stored as target code data in the storage unit 7Q. Further, the code data immediately before and immediately after the target code data are read from the storage unit 7P and stored in the storage units 7R and 7S as the previous code data and the subsequent code data, respectively. However, when AVNS is determined for the first chord of the chord progression, there is no previous chord data, so tonic code data representing the tonic code of the key indicated by the key data of the memory unit 7T is stored in the memory unit 7R. When the AVNS is determined for the last chord of the chord progression, there is no subsequent chord data, so that the tonic code data representing the key tonic chord is stored in the storage unit 7S as in the case of the previous chord data.
[0036]
The AVNS table 61 represents one or a plurality of AVNS for each one or a plurality of code types as shown in FIG. 4 as an example, and is stored in the ROM 6 or the HDD 11, for example. FIG. 4 shows the key (major or minor) used for chords and AVNS. In the example of FIG. 4, only the scale in the diatonic code is shown. One code type may correspond to a plurality of scales. This means that even if one code type is used, the scale is different if the code function is different. For example, in C major tone, major (M) is used for tonic (C) and subdominant (F), and the scale at this time becomes an ionian scale corresponding to tonic, and a redian scale corresponding to subdominant. Become.
[0037]
In determining AVNS, AVNS candidates corresponding to the target code are extracted with reference to the AVNS table 61 for each target code indicated by the target code data in the storage unit 7Q. Then, if there is only one AVNS candidate for extraction, such as “Locrian scale” when “m7 ♭ 5”, that one AVNS candidate is determined as an AVNS for the target code, and “M” If there are a plurality of codes such as “Ionian scale, Ridian scale”, reference is made to the previous chord data of the storage unit 7R and the rear chord data of the storage unit 7S, and the constituent sound of at least one of the front chord and the rear chord is included One AVNS candidate is detected from among a plurality of AVNS candidates related to extraction, and one AVNS candidate related to this detection is determined as an AVNS for the target code. Further, a plurality of AVNS candidates including a constituent sound of at least one of the preceding code and the following code are detected from the plurality of AVNS candidates related to extraction, and one of the plurality of AVNS candidates related to the detection is detected. An AVNS candidate is selected, and one AVNS candidate related to this selection is determined as an AVNS for the target code.
[0038]
5 and 6 are flowcharts showing the procedure of AVNS determination processing based on the preceding and following codes.
[0039]
In FIG. 5, first, in step S11, the chord progression is acquired together with the key data. That is, key data and chord progression data are acquired by any of the acquisition methods described above, and key data is stored in the storage unit 7T and chord progression data is stored in the storage unit 7P.
[0040]
Next, in step S12, the target chord, the previous chord, and the rear chord are acquired from the chord progression. That is, the target code data is read from the storage unit 7P and written to the storage unit 7Q, and the previous code data and the subsequent code data are written to the storage units 7R and 7S, respectively. When the first chord of the chord progression is the target chord, the tonic code data representing the key tonic code is written as the previous chord data in the storage unit 7R, the next chord data of the target chord is read from the storage unit 7P, and the post code Data is written in the storage unit 7S. Thereafter, the process proceeds to step S13.
[0041]
In step S13, AVNS candidates corresponding to the target code are extracted from the AVNS table 61. That is, the AVNS candidate corresponding to the target code indicated by the target code data in the storage unit 7Q is read from the AVNS table 61 and set in a candidate register (not shown) in the RAM 7. There may be one AVNS candidate or a plurality of AVNS candidates set at this time.
[0042]
Next, in step S14, it is determined whether there are a plurality of AVNS candidates in the candidate register. If the result of this determination is negative (N), it means that there is one AVNS candidate, and the routine goes to Step S15 in FIG.
[0043]
In step S15, one AVNS candidate in the candidate register is determined as an AVNS for the target code. Then, the scale data ASD instructing the AVNS related to the determination is written in the storage unit 7P corresponding to the target code data.
[0044]
On the other hand, when the determination result of step S14 is affirmative (Y), the process proceeds to step S16, and a common sound common to the constituent sound of the previous chord and the constituent sound of the rear chord is detected. That is, a common sound is detected from the constituent sound of the chord indicated by the previous chord data in the storage unit 7R and the constituent sound of the chord instructed by the post chord data of the storage unit 7S. For example, if the constituent sounds of the previous chord are B ♭, D, F and the constituent sounds of the rear chord are E ♭, G, B ♭, the common sound is B ♭.
[0045]
Next, in step S17, it is determined whether there is a common sound. If the result of this determination is affirmative (Y), the process moves to step S18, and it is determined whether or not there is an AVNS candidate including a common sound among the plurality of AVNS candidates related to extraction in step S13. If the result of this determination is affirmative (Y), the process moves to step S19, and it is determined whether or not there are a plurality of AVNS candidates including the most common sound among the plurality of AVNS candidates related to extraction in step S13. . If the result of this determination is negative (N), it means that there is one AVNS candidate that contains the most common sounds, and the routine goes to Step S15.
[0046]
In step S15, one AVNS candidate that contains the most common sound is determined as the AVNS for the target code, and the scale data ASD that indicates the AVNS related to the determination is written in the storage unit 7P in the same manner as described above.
[0047]
When the determination result of step S17 or S18 is negative (N) (there is no common sound or there is no AVNS candidate including it), or the determination result of step S19 is positive (Y) If there is (a plurality of AVNS candidates including the most common sounds), the process proceeds to step S20 in FIG.
[0048]
In step S20, for each AVNS candidate among the plurality of AVNS candidates related to the extraction in step S13, the number of constituent sounds of the previous code included in the AVNS candidate and the number of constituent sounds of the subsequent code included in the AVNS candidate And detect. At this time, the front code and the back code are indicated by the front code data of the storage unit 7R and the back code data of the storage unit 7S, respectively.
[0049]
Next, in step S21, it is detected in step S20 whether or not there is an AVNS candidate including a constituent sound of either the previous code or the subsequent code among the plurality of AVNS candidates related to the extraction in step S13. Determine based on the results. If the result of this determination is affirmative (Y), the process moves to step S22, and among the plurality of AVNS candidates related to extraction in step S13, whether there are a plurality of AVNS candidates that contain the most chord constituent sounds, The determination is made based on the detection result of step S20.
[0050]
As an aspect in which one AVNS candidate includes a chord constituent sound, (a) only the constituent sound of the previous chord, (b) only the constituent sound of the rear chord, (c) both the front chord and the rear chord There may be one that includes the following sounds. As the number of chord constituent sounds included in one AVNS candidate, the number of constituent sounds included in the preceding chord is adopted in the aspect (a), the number of constituent sounds included in the subsequent chord is adopted in the aspect (b), and the aspect ( In c), if the number of constituent sounds included in the preceding and following chords is equal, the same number is adopted, and if it is not equal, the larger number (for example, three sounds if two and three sounds) is adopted. In this way, after determining the number of chord constituent sounds included for each AVNS candidate, it is determined in step S22 whether or not there are a plurality of AVNS candidates having the largest number of obtained chord constituent sounds. If the result of this determination is negative (N), it means that there is one AVNS candidate that contains the most chord constituent sounds, and the routine goes to Step S15.
[0051]
In step S15, one AVNS candidate that contains the most chord constituent sounds is determined as the AVNS for the target code, and the scale data ASD that indicates the AVNS related to the determination is written in the storage unit 7P in the same manner as described above.
[0052]
The determination result in step S21 is negative (N) (no AVNS candidate including the constituent sound of either the previous chord or the rear chord) or the determination result in step S22 is negative (N) If there is a plurality of AVNS candidates that contain the most chord constituent sounds, the process proceeds to step S23.
[0053]
When the process proceeds from step S21 to step S23, in step S23, one AVNS candidate that includes the largest scale tone is selected from the plurality of AVNS candidates related to the extraction in step S13. When the process proceeds from step S22 to step S23, in step S23, one AVNS candidate that includes the largest scale tone is selected from the plurality of AVNS candidates related to the determination in step S22. In either case, the key is indicated by the key data in the storage unit 7T. After selection of the AVNS candidate, in step S23, one AVNS candidate related to the selection is determined as an AVNS for the target code, and scale data ASD indicating the AVNS related to the determination is stored in the storage unit 7P corresponding to the target code data. Write.
[0054]
In step S23, when selecting an AVNS candidate, the selection may be performed in consideration of elements other than the key scale. For example, if a melody corresponding to chord progression already exists, an AVNS candidate that includes more constituent sounds of the melody in the target chord section may be selected. In addition, an AVNS candidate including a constituent sound of a chord having a longer pronunciation time among the previous chord and the rear chord may be selected. Furthermore, in order to reflect the user's musical preference, the user may be able to specify whether to select an AVNS candidate that includes a constituent sound of the preceding chord or an AVNS candidate that includes the constituent sound of the subsequent chord.
[0055]
When the process of step S15 or S23 is completed, the process proceeds to step S24, and it is determined whether or not there is a next code for determining AVNS in the storage unit 7P. For example, when the first chord of the chord progression is set as the target chord in step S12 and the process proceeds to step S24 for the first time, the next chord is present, so the determination result in step S24 is affirmative (Y), and the process proceeds to step S25. Move.
[0056]
In step S25, the target code is set to the next code. Then, the process returns to step S12, and the target code, the previous code, and the subsequent code are acquired from the chord progression in the same manner as described above. For example, when the target code is the second code (the code next to the top code), the top code, the second code, and the third code are set in the storage units 7Q, 7R, and 7S, respectively. After step S12, the processing after step S13 is performed in the same manner as described above.
[0057]
When the AVNS is sequentially determined for the chords constituting the chord progression as described above, the last chord of the chord progression is finally set as the target chord in step S25. Then, returning to step S12, the last chord, the chord immediately before the last chord, and the key tonic chord are set in the storage units 7Q, 7R, and 7S, respectively. Next, the processing after step S13 is performed. In step S15 or S23, the AVNS for the last code is determined, and the scale data ASD indicating the AVNS related to the determination is written in the storage unit 7P in the same manner as described above. Thereafter, when it is determined in step S24 whether or not there is the next code, the determination result is negative (N), and the process is terminated.
[0058]
As described above, according to the AVNS determination process based on the preceding and following chords, it is possible to automatically determine an AVNS suitable for each chord constituting each chord progression. Examples 1 to 3 will be sequentially described as specific examples of such AVNS determination.
[0059]
[Example 1] When the chord progression is B ♭, F, E ♭ in C major, and the target chord is F, the AVNS candidate is
Ionian scale: F, G, A, B ♭, C, D, E
Lydian scale: F, G, A, B, C, D, E
And the front and rear chords are
Previous code B ♭: B ♭, D, F
Rear code E ♭: E ♭, G, B ♭
It becomes. Here, the common sound is B ♭, and the AVNS candidate including the common sound B ♭ is one ionian scale. Therefore, the ionian scale is determined as AVNS for the target code F.
[0060]
[Example 2] When the chord progression is B ♭, F, C in C major tone and the target chord is F, the AVNS candidate is
Ionian scale: F, G, A, B ♭, C, D, E
Lydian scale: F, G, A, B, C, D, E
And the front and rear chords are
Previous code B ♭: B ♭, D, F
Rear code C: C, E, G
It becomes. Here, there is no common sound. The constituent sound of the front chord B ♭ included in the ionian scale is three sounds of B ♭, D, and F, and the constituent sound of the post chord C included in the ionian scale is three sounds of C, E, and G. is there. In addition, the constituent sound of the previous chord B ♭ included in the Lydian scale is two sounds of D and F, and the constituent sound of the rear chord C included in the Lydian scale is three sounds of C, E, and G. . Therefore, there are two AVNS candidates that contain the most chord constituent sounds: the ionian scale and the redian scale, and among these scale candidates, the AVNS candidate that contains the most key scales is the C major scale C , D, E, F, G, A, B. As a result, the redian scale is determined as AVNS for the target code F.
[0061]
[Example 3] When the chord progression is C major B ♭, F, D and the target chord is F, the AVNS candidate is
Ionian scale: F, G, A, B ♭, C, D, E
Lydian scale: F, G, A, B, C, D, E
And the front and rear chords are
Previous code B ♭: B ♭, D, F
Rear code D: D, F #, A
It becomes. Here, the common sound is D, and AVNS candidates including the common sound D are the ionian scale and the redian scale. The constituent sounds of the front chord B ♭ included in the ionian scale are the three sounds B ♭, D, and F, and the constituent sounds of the post chord D included in the ionian scale are the two sounds D and A. In addition, the constituent sounds of the front chord B 含 ま included in the Lydian scale are two sounds of D and F, and the constituent sounds of the post chord D included in the Lydian scale are two sounds of D and A. Therefore, the AVNS candidate including the most chord constituent sounds is one ionian scale, and the ionian scale is determined as the AVNS for the target code F.
[0062]
The AVNS determination process based on the preceding and following codes may be performed with the following changes (a) to (g).
[0063]
(B) Although chord progression data is obtained together with tone data, only chord progression data may be obtained without obtaining tone data, and thereafter the tone may be automatically detected based on the chord progression data. In this case, it is not necessary to detect a partial modulation, and a key that dominates the entire chord progression may be detected. The key detection of the entire chord progression is a known technique, and is easier than the partial key detection. Further, if the chord progression to be acquired is limited to only a predetermined key (for example, C major key), or the step of “making an AVNS candidate including the most key scale tone an AVNS for the target chord” is omitted, It is not necessary to give key data.
[0064]
(B) In the AVNS table shown in FIG. 4, only the scale in the diatonic code is stored, but the scale in the non-diatonic code may also be stored. Also, the storage data format of the AVNS table is not limited to that shown in FIG.
[0065]
(C) After the process of detecting one or a plurality of AVNS candidates including common constituent sounds in the preceding and following chords (the process of steps S16 to S19), 1 that contains the most constituent sounds of at least one chord of the preceding and following chords Alternatively, the example of performing the process of detecting a plurality of AVNS candidates (the process of steps S20 to S22) has been shown, but the order of these processes may be reversed, or only one of the processes may be performed. Good. If both processes are always performed and different results are obtained, the result of one of the processes may be preferentially employed or may be employed randomly.
[0066]
(D) Regarding the target code, the AVNS is determined by referring not only to the previous code and the next code but also to the previous code and the next code. Also good. For example, when a plurality of AVNS candidates remain by referring to only the preceding and following chords, the AVNS including the chord constituent sounds should be adopted by referring to the two preceding chords and the second chord. That's fine. Furthermore, three or more previous codes and three or more subsequent codes may be referred to.
[0067]
(E) For the first and last chords in the chord progression, the AVNS decision was made using the key tonic chord as the temporary pre-chord and temporary post-chord, respectively. Alternatively, an exceptional AVNS determination process that does not use the preceding code and the following code may be performed.
[0068]
(F) When determining the number of chord constituent sounds included in each AVNS candidate for each AVNS candidate, if the number of chord constituent sounds included is equal between the preceding chord and the succeeding chord, the same number is adopted. Although the larger number is adopted, a value (for example, a simple addition value, a weighted addition value, etc.) in consideration of the number of chord constituent sounds included in both the front chord and the rear chord may be adopted. For example, if the number of front and rear chords included in one AVNS candidate is 2 and 3, respectively, the number of chords included can be set to 5, and other AVNS candidates can be similarly chorded. The number of constituent sounds can be obtained. Then, the AVNS candidate having the larger number of chord constituent sounds may be determined as the AVNS for the target chord.
[0069]
(G) In the AVNS determination process, when any of a plurality of AVNS candidates presented for the target code includes a constituent sound of the preceding code and the following code, either the preceding code or the following code May be determined as the AVNS for the target chord with the larger number of chord constituent sounds included for the other chord. In this way, an AVNS candidate having a better connection with the preceding and following codes can be determined as an AVNS for the target code.
[0070]
As described above, in the present embodiment, the AVNS of the target code is basically determined based on the preceding and following codes, and is corrected under a predetermined condition so that a more natural AVNS can be obtained. I have to. The reason for this modification is that if the AVNS of the target code is determined based on the code before and after it under any condition, the obtained AVNS may be too dependent on the code before and after. is there. For example, in the case of a chord progression of F, Dm, A7, if AVNS is determined by the AVNS determination process (FIGS. 5 and 6) based on the preceding and following chords, C, D, E, F, G, A, B, A scale of C # is obtained, and “#” is appended to “C”. However, in the above chord progression, since the previous chord is a diatonic chord, it is determined that the chord is in tone, and the AVNS of the target chord (Dm) is preferably determined to be a diatonic note scale. In this case, that is, when the target chord is a diatonic chord, in the present embodiment, the AVNS of the target chord is determined as a diatonic note scale based on the previous chord.
[0071]
A program in which a storage medium storing software program codes for realizing the functions of the above-described embodiments is supplied to a system or apparatus, and a computer (or CPU 5 or MPU) of the system or apparatus is stored in the storage medium. It goes without saying that the object of the present invention can also be achieved by reading and executing the code.
[0072]
In this case, the program code itself read from the storage medium realizes the novel function of the present invention, and the storage medium storing the program code constitutes the present invention.
[0073]
As the storage medium for supplying the program code, for example, the floppy disk 20, hard disk, optical disk, magneto-optical disk, CD-ROM 21, CD-R, magnetic tape, nonvolatile memory card, ROM 6 or the like may be used. it can. Further, the program code may be supplied from the server computer 102 via another MIDI device 100 or the communication network 101.
[0074]
Further, by executing the program code read out by the computer, not only the functions of the above-described embodiments are realized, but also the OS running on the computer based on the instruction of the program code performs the actual processing. It goes without saying that a case where the functions of the above-described embodiment are realized by performing part or all of the above and the processing thereof is included.
[0075]
Further, after the program code read from the storage medium is written to 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. It goes without saying that the case where the CPU 5 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.
[0076]
【The invention's effect】
As described above, according to the present invention, the available note scale of the target chord is determined based on the preceding and following chords, and this is corrected under predetermined conditions. , You can get a more natural available note scale.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of an AVNS determination apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a procedure of AVNS determination processing executed by the AVNS determination apparatus of FIG. 1, particularly a CPU;
FIG. 3 is a diagram for explaining an overview of AVNS determination processing based on preceding and following codes.
FIG. 4 is a diagram illustrating an example of an AVNS table.
5 is a flowchart showing a procedure of AVNS determination processing based on the front and rear codes of FIG.
6 is a flowchart showing a continuation procedure of AVNS determination processing based on the front and rear codes of FIG. 5. FIG.
[Explanation of symbols]
5 CPU (input means, discrimination means, determination means)
7 RAM (input means)
11 HDD (input means)
13 MIDII / F (input means)
14 Communication I / F (input means)

Claims (2)

Input means for inputting chord progression data and key data ;
A discriminating means for discriminating whether the chord constituting the chord progression data is a diatonic code or a non-diatonic chord based on the inputted chord progression data and key data ;
Wherein the input code progression data, a determination means for determine the Abeiraburu Notes scale object code for which you want to determine the Abeiraburu notes scale
When the target code is determined as a diatonic code by the determination means ,
By said determining means, when the immediately preceding code located immediately before the object code is determined to diatonic code first determining method of determining a Abeiraburu note scale of the target code diatonic note scale To determine the available note scale for the subject code ,
By said discriminating means, the immediately preceding code is judged non diatonic code, when it is judged immediately after the code Hurghada Iatonikku code located immediately after the target code, Abeiraburu Notes of the subject code It said first and determination method, a second method of determining of determining based on the Abeiraburu note scale of the target code in the immediately preceding code and each component notes immediately after the code that determines the scale diatonic note scale And randomly determining the available note scale of the target code using the selected determination method ,
When both the immediately preceding chord and the immediately following chord are determined to be non-diatonic chords by the discriminating means, the available note scale of the target chord is determined by the second determining method,
When the determination means determines that the target code is a non-diatonic code, the available note scale of the target code is determined by the second determination method;
An available note scale determining apparatus comprising: Based on the entered chord progression data and tone data, or code constituting the chord progression data are diatonic code, a determination module for determining whether a non diatonic code,
Wherein the input code progression data, a determination module that determines the Abeiraburu Notes scale object code for which you want to determine the Abeiraburu notes scale
When the target code is determined as a diatonic code by the determination module ,
A first determination method for determining an available note scale of a target code as a diatonic note scale when the determination module determines that the immediately preceding code located immediately before the target code is a diatonic code To determine the available note scale for the subject code ,
By the determination module, the immediately preceding code is judged non diatonic code, when it is judged immediately after the code Hurghada Iatonikku code located immediately after the target code, Abeiraburu Notes of the subject code It said first and determination method, a second method of determining of determining based on the Abeiraburu note scale of the target code in the immediately preceding code and each component notes immediately after the code that determines the scale diatonic note scale And randomly determining the available note scale of the target code using the selected determination method ,
When both the immediately preceding code and the immediately following code are determined to be non-diatonic chords by the discriminating module, the available note scale of the target chord is determined by the second determining method,
By the determination module, when the target code is determined as non diatonic code, and what determines Ri by the Abeiraburu note scale of the target code to the second determination method
A storage medium that stores a program that can be realized by a computer .

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