JP4172703B2 - Performance assist device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a performance assist device, and more particularly to a performance assist device that corrects performance information input by a user.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known an apparatus that converts an input performance signal into a music-oriented one so that a player who lacks musical knowledge can enjoy the performance freely without worrying about the music theory. (For example, refer to Patent Document 1.)
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 05-027757
[0004]
[Problems to be solved by the invention]
The conventional performance assist device uniformly converts the input performance signal into a chord constituent sound or a scale tone of a specified key. There are cases where the sensitivity of the performer cannot be fully utilized.
[0005]
Further, since the conventional performance assisting device is mainly intended to perform accompaniment performance (chord performance), it converts the input note into a note that matches the chord at that time. Therefore, even if the performer inputs a performance intended for an ad lib performance, for example, the relative pitch etc. are discarded to some extent, so that it is possible to obtain an ad lib performance output reflecting the performance intention of the performer. difficult.
[0006]
An object of the present invention is to provide a performance assisting device capable of obtaining an ad-lib-like performance output reflecting the performance intention of a performer.
[0007]
[Means for Solving the Problems]
According to one aspect of the present invention, the performance assisting device includes: Depending on the performance operation by the user An input means for inputting performance information, a chord supply means for storing chord progression and supplying chords at the current time, and first performance information input from the input means as a root sound of the supplied chords First conversion means for converting to second performance information having a pitch difference of a specific frequency, and the first performance information, the performance information input immediately before, An offset value determined according to the pitch difference from the performance information input this time and the performance information output immediately before is added to the root sound closest to the performance information output immediately before. A second conversion means for converting to third performance information; performance information input immediately before from the input means; and performance information input this time In semitones A pitch difference detecting means for detecting a pitch difference, and a case where the first performance information is performance information inputted first and the detected pitch difference is 0 or 5 In the case of the above, the first converting means converts the first performance information, and the detected pitch difference is 1 to 4 A conversion means selection means for causing the second conversion means to convert the first performance information; Output means for outputting performance information converted by the first conversion means or the second conversion means selected by the conversion means selection means; Have
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram showing a hardware configuration of a performance assisting apparatus 1 according to an embodiment of the present invention.
[0009]
A RAM 3, ROM 4, CPU 5, external storage device 7, detection circuit 8, display circuit 10, tone generator circuit 12, effect circuit 13, MIDI interface 16, and communication interface 17 are connected to the bus 2 of the performance assisting device 1.
[0010]
The user can make various settings using a plurality of panel controls 9 connected to the detection circuit 8. The panel operator 9 may be any device that can output a signal corresponding to a user input, such as a rotary encoder, a switch, a mouse, a character input keyboard, a joystick, or a jog shuttle.
[0011]
The panel operator 9 may be a soft switch or the like displayed on the display 11 that is operated using another operator such as a mouse.
[0012]
The display circuit 10 is connected to the display 11 and can display various information on the display 11.
[0013]
The external storage device 7 includes an interface for an external storage device, and is connected to the bus 2 via the interface. The external storage device 7 includes, for example, a floppy (registered trademark) disk drive (FDD), a hard disk drive (HDD), a magneto-optical disk (MO) drive, a CD-ROM (compact disk-read only memory) drive, and a DVD (Digital Versatile Disc). ) Drive, semiconductor memory, etc.
[0014]
The external storage device 7 can store various parameters, various data, programs for realizing the present embodiment, performance information, and the like.
[0015]
The RAM 3 has a working area for the CPU 5 that stores flags, registers or buffers, various parameters, and the like. The ROM 4 can store various parameters and control programs, or a program for realizing the present embodiment. The CPU 5 performs calculation or control according to a control program or the like stored in the ROM 4 or the external storage device 7.
[0016]
The timer 6 is connected to the CPU 5 and supplies a basic clock signal, interrupt processing timing, and the like to the CPU 5.
[0017]
The tone generator circuit 12 generates musical tone signals in accordance with performance signals such as MIDI information supplied from the performance information MD recorded in the external storage device 7 or the like, the performance operator 15 or the MIDI device 18 connected to the MIDI interface 16. Generated and supplied to the sound system 14 via the effect circuit 13.
[0018]
The system of the tone generator circuit 12 may be any system such as a waveform memory system, FM system, physical model system, harmonic synthesis system, formant synthesis system, VCO + VCF + VCA analog synthesizer system, and analog simulation system. The tone generator circuit 12 may be configured using dedicated hardware, the tone generator circuit 12 may be configured using a DSP + microprogram, or the tone generator circuit 12 may be configured using a CPU + software program. Good. A combination of these may also be used. Further, a plurality of sound generation channels may be formed by using one circuit in a time division manner, or one sound generation channel may be formed by one circuit.
[0019]
The effect circuit 13 gives various effects to the digital musical tone signal supplied from the tone generator circuit 12. The sound system 14 includes a D / A converter and a speaker, converts a digital musical tone signal supplied to an analog format, and generates a sound.
[0020]
The performance operator 15 is connected to the detection circuit 8 and supplies a performance signal in accordance with the performance operation of the user. In this embodiment, a performance keyboard is used as the performance operator 15. The performance operator 15 may be any operator as long as it can output at least a performance signal such as a MIDI signal.
[0021]
The MIDI interface (MIDI I / F) 16 can be connected to an electronic musical instrument, other musical instruments, audio equipment, a computer, and the like, and can transmit and receive at least a MIDI signal. The MIDI interface 16 is not limited to a dedicated MIDI interface, and may be configured using a general-purpose interface such as RS-232C, USB (Universal Serial Bus), IEEE 1394 (I-Triple 1394). In this case, data other than MIDI messages may be transmitted and received simultaneously.
[0022]
The MIDI device 18 is an acoustic device, a musical instrument or the like connected to the MIDI interface 16. The form of the MIDI device 18 is not limited to a keyboard instrument, and may be a string instrument type, a wind instrument type, a percussion instrument type, or the like. In addition, the sound source device, the automatic performance device, etc. are not limited to those built in one electronic musical instrument body, but each is a separate device, and each device is connected using communication means such as MIDI or various networks. There may be. The user can also input a performance signal by playing (manipulating) the MIDI device 18.
[0023]
The MIDI device 18 can also be used as an operator for inputting various data other than performance information and various settings.
[0024]
The communication interface 17 can be connected to a communication network 19 such as a LAN (local area network), the Internet, or a telephone line. The communication interface 17 is connected to the server computer 20 via the communication network 19, and the external storage device 7 such as an HDD, or A control program, a program for realizing the present embodiment, performance information, and the like can be downloaded from the server computer 20 into the RAM 4 or the like.
[0025]
The communication interface 17 and the communication network 19 are not limited to wired ones and may be wireless. Moreover, you may provide both.
[0026]
FIG. 2 is a block diagram showing functions of the performance assisting device 1 according to the embodiment of the present invention.
[0027]
The performance assisting device 1 includes, for example, a performance signal input unit 21, a chord progression supply unit 22, a note conversion unit 23, and a sound generation unit 24.
[0028]
The performance signal input unit 21 includes, for example, the performance operator 15 and the detection circuit 8 of FIG. 1 or the MIDI device 18 and supplies the performance signal to the note conversion unit 23.
[0029]
The chord progression supply unit 22 includes the ROM 4 or the external storage device 7 and stores a plurality of chord progression data. The chord progression data is data in which the chord progression of the music is recorded by a Degree code in which a series of chord names or chords are expressed in frequency. The chord progression data may correspond to a specific music piece or may not assume a specific music piece. Further, in addition to chord progression data, performance data of drums and other parts may be included. In this embodiment, the function of each chord is interpreted musically by managing the chord name with “key information + frequency”. Therefore, only the Degree code is recorded in the chord progression data, and the actual chord name is specified together with the key information specified by the user. Alternatively, the key information may be included in the chord progression data. The actual chord name may be recorded in the chord progression data, and in that case, there is no key information. The chord progression supply unit 22 supplies chord progression data designated by the user to the note conversion unit 23.
[0030]
The note conversion unit 23 changes the note number included in the performance signal supplied from the performance signal input unit 21 based on the chord progression data supplied from the chord progression supply unit 22 by the performance assisting process according to the present embodiment described later. To do.
[0031]
The note conversion unit 23 includes a transposition unit 31, a previous pitch difference detection unit 32, a gate 33, a selector 34, an addition unit 35, a root pitch difference detection unit 36, a delay 37, a demodulation unit 38, an input storage unit 39, and a table T1. , T2.
[0032]
The transposing unit 31 transposes the note number (pitch information) included in the performance signal input from the performance signal input unit 21 from the original tone supplied as key information from the chord progression supply unit 22 to the Cmajor key (C major key). To do.
[0033]
The immediately preceding pitch difference detecting unit 32 includes the input note number transposed to the CMajor key by the transposing unit 31 and the immediately preceding input note number (translated to the CMajor key) stored in the input storage unit 39. Calculate the pitch difference. In accordance with the calculated pitch difference, a column reference pointer i of the table T2 and a control signal gate for controlling the gate 33 and the selector 34 are output. For values of the column reference pointer i and the control signal gate at each calculated pitch difference, see step SA8 in FIG.
[0034]
When the value of the control signal gate input from the previous pitch difference detector 32 is “0” (gate = 0), the gate 33 refers to an input note number (converted note number) that is converted with reference to the table T1. Is output to the selector 34. When the value of the control signal gate is “1” (gate = 0), the input note number is blocked.
[0035]
A plurality of tables T1 are prepared for each Degree code. For example, as shown in FIG. 3A, a certain range of input note numbers (note numbers 0 to 31, 32 to 37, etc.) are represented by the current Degree code. Is a table for converting the sound into 3 or 7 degrees sound (28 (E0), 35 (B0), etc.). The table T1 shown in FIG. 3A is for the case where the Degree code is IM7.
[0036]
The selector 34 selects the input note number converted by the table T1 supplied from the gate 33 when the value of the control signal gate input from the immediately preceding pitch difference detector 32 is “0” (gate = 0). The data is output to the demodulator 38 and the delay 37. When the value of the control signal gate input from the immediately preceding pitch difference detection unit 32 is “1” (gate = 0), the input note number (converted note number) converted by the table T2 input from the addition unit 35. Is output to the demodulator 38 and the delay 37.
[0037]
The adding unit 35 adds the note number root of the root note (C note) closest to the converted note number just supplied from the root pitch difference detecting unit 36 and the offset value obtained by referring to the table T2. Then, the conversion note number is output.
[0038]
The root pitch difference detection unit 36 calculates the note number root of the root sound (C sound) closest to the converted note number just supplied from the delay 37, and also calculates the note of the calculated root sound (C sound). A difference value between the number root and the converted note number just supplied from the delay 37 is determined as a row reference pointer (pitch difference) j in the table T2.
[0039]
As with the table T1, a plurality of tables T2 are prepared for each Degree code. For example, as shown in FIG. 3B, a note indicated by a column reference pointer i and a row reference pointer (pitch difference) j. It is a table for outputting a number offset value (conversion coefficient).
[0040]
Here, in the table T2, when the value of the column reference pointer i is “1”, that is, when the pitch difference between the immediately preceding input note number and the current input note number is “1” or “2” (0 <Previous input note number−Current input note number ≦ 2) is converted into a performance that is scaled and scaled up. When the value of the column reference pointer i is “2”, that is, when the pitch difference between the previous input note number and the current input note number is “−1” or “−2” (0> immediately preceding input note) Number-current input note number ≧ -2) is converted into a performance that is scaled and scaled down.
[0041]
Further, when the value of the column reference pointer i is “3”, that is, when the pitch difference between the previous input note number and the current input note number is “3” or “4” (2 <previous input note Number—This input note number ≦ 4) is converted into an arpeggio-like performance and a scale-up performance. When the value of the column reference pointer i is “4”, that is, when the pitch difference between the previous input note number and the current input note number is “−3” or “−4” (−2> the previous input Note number—This input note number ≧ −4) is converted into an arpeggio-like performance that is scaled down.
[0042]
When the value of the column reference pointer i is “0”, that is, when the pitch difference between the previous input note number and the current input note number is “0” or “± 5” or more, the offset value “ 0 "is output.
[0043]
Further, in this specification, a performance using the scale note included in the current key is called a scale performance, and a performance using the constituent sound of the current Degree chord is called an arpeggio performance.
[0044]
As described above, a plurality of tables T2 are prepared for each degree code similarly to the table T1, and the table shown in FIG. 3A is applied when the degree code is IM7. For example, when the Degree code is IIIm7, the table T2 shown in FIG. 4A is used, and when the Degree code is IIm7,
A table T2 shown in FIG. 4B is used.
[0045]
Returning to FIG. 3, the delay 37 temporarily stores the converted note number selected and output from the selector 34, and the route is used as the immediately previous converted note number at the next conversion (when the next note number is converted). Output to the pitch difference detector 36.
[0046]
The demodulator 38 demodulates the converted note number selected and output from the selector 34 from the CMajor tone to the original tone, and outputs a performance signal including the converted and demodulated note number to the sound generator 24.
[0047]
The sound generation unit 24 includes, for example, the tone generator circuit 12, the effect circuit 13, and the sound system 14 shown in FIG. 1, and generates and generates a musical sound signal based on the input performance signal. Note that the sound generation unit 24 may be configured by a device (sound source module or the like) connected to the outside.
[0048]
Next, in the performance assisting apparatus 1 according to the present embodiment shown in FIG. 2, the musical performance difference (note number) that is input first, the note number that is input after the second time, and the difference in pitch from the immediately preceding note number. But 1-4 The pitch difference between the note number and the note number entered immediately before 0 or 5 Each of the above cases will be specifically described with reference to FIGS.
[0049]
FIG. 5 is a block diagram showing an example of a conversion process of performance information (first sound) input first.
[0050]
First, the key information (F) from the chord progression supply unit 22 and the pitch (note number) “G3 # (68)” of the first note from the performance signal input unit 21 are input to the transposition unit 31. The transposition unit 31 transposes the input “G3 # (68)” from the current key “F” to “C” (pitch is changed). 5 The note number is “D3 # (63)”. Thereafter, the transposed note number “D3 # (63)” is stored in the input storage unit 39 for the next conversion process, and is sent to the immediately preceding pitch difference detection unit 32 and the gate 33.
[0051]
The immediately preceding pitch difference detection unit 32 detects the pitch difference between the transposed note number “D3 # (63)” and the previously inputted note number stored in the input storage unit 39. Since no note number is stored, gate = 0 and i = 0 are output.
[0052]
When the gate 33 receives the signal of gate = 0, the gate 33 is in an open state, and the transposed note number “D3 # (63)” is supplied from the chord progression supply unit 22 using the table T1. It is converted into a note number “E3 (64)” which is a third sound of the Degree code “IM7”. The note number “E3 (64)” converted here is sent to the selector 34.
[0053]
The selector 34 selects the note number converted by the table T1 according to the signal of gate = 0, and sends the converted note number “E3 (64)” to the demodulator 38 and the delay 37 in the subsequent stage. The demodulator 38 demodulates the received note number “E3 (64)” to “F” which is the original key (pitch is changed). 5 The note number “A3 (69)” is output to the sound generator 24. The delay 37 temporarily stores the received note number “E3 (64)” for use in processing the next input performance signal.
[0054]
On the other hand, the table T2 receives a signal of i = 0 from the previous pitch difference detector 32, receives a signal of j = 0 from the root pitch difference detector 36, and adds an offset value “0” to the adder 35. Output. The root pitch difference detection unit 36 outputs a signal of i = 0 because the previous conversion note number is not stored in the delay 37. When the value of the control signal gate is “0” (gate = 0), the processing of the table T2, the root pitch difference detection unit 36, and the addition unit 35 may be omitted.
[0055]
FIG. 6 is a block diagram illustrating an example of conversion processing of performance information (second and subsequent sounds) input after the second. Here, as the second sound, the pitch difference from the first sound is 4 An example in which the following note number is input will be described.
[0056]
First, the key information (F) is input from the chord progression supply unit 22 and the pitch (note number) “F3 # (66)” of the second tone is input from the performance signal input unit 21 to the transposition unit 31. The transposition unit 31 transposes the input “F3 # (66)” from “F”, which is the current key, to “C” (pitch is changed). 5 The note number is “C3 # (61)”. Thereafter, the transposed note number “C3 # (61)” is stored in the input storage unit 39 for the next conversion process, and is also sent to the immediately preceding pitch difference detection unit 32 and the gate 33.
[0057]
The immediately preceding pitch difference detection unit 32 includes the transposed note number “C3 # (61)” and the last input (and transposition) note number “D3 # (63)” stored in the input storage unit 39. The pitch difference “−2” is detected, and gate = 1 and i = 2 are output.
[0058]
When the gate 33 receives the signal of gate = 1, the gate 33 enters a close state, and the conversion process using the table T1 for the transposed note number “C3 # (61)” is not performed.
[0059]
The root pitch difference detection unit 36 calculates the root sound “C3 (60)” closest to the previous converted note number “E3 (64)” in the delay 37, and the calculated root sound “C3 (60)”. And pitch difference “4” between the previous conversion note number “E3 (64)” and j = 4 are output to the table T2. The table T2 receives a signal of i = 2 from the previous pitch difference detector 32, receives a signal of j = 4 from the root pitch difference detector 36, and outputs an offset value “2” to the adder 35. . The adding unit 35 adds the offset value “2” to the root sound “C3 (60)” output from the root pitch difference detecting unit 36 and outputs the note number “D3 (62)” as the converted note number. To do.
[0060]
The selector 34 selects the note number “D3 (62)” converted by the table T2 in accordance with the signal of gate = 1, and selects the note number “D3 (62)” converted to the demodulator 38 and the delay 37 in the subsequent stage. Send it out. The demodulator 38 demodulates the received note number “D3 (62)” to “F” which is the original key (pitch is changed). 5 The note number “G3 (67)” is output to the sound generator 24. The delay 37 temporarily stores the received note number “D3 (62)” for use in processing the next input performance signal.
[0061]
FIG. 7 is a block diagram illustrating another example of conversion processing of performance information (second and subsequent sounds) input after the second. Here, as the second sound, the pitch difference from the first sound is 4 An example in which the above note number is input will be described.
[0062]
First, the key information (F) from the chord progression supply unit 22 and the pitch (note number) “G4 # (80)” of the second note from the performance signal input unit 21 are input to the transposing unit 31. The transposition unit 31 transposes the input “G4 # (80)” from “F”, which is the current key, to “C”. 5 The note number is set to “D4 # (75)”. Thereafter, the transposed note number “D4 # (75)” is stored in the input storage unit 39 for the next conversion process, and is sent to the immediately preceding pitch difference detection unit 32 and the gate 33.
[0063]
The immediately preceding pitch difference detecting unit 32 includes the transposed note number “D4 # (75)” and the previously input (and transposed) note number “C3 # (61)” stored in the input storage unit 39. A pitch difference “14” is detected, and gate = 0 and i = 0 are output.
[0064]
When the gate 33 receives the signal of gate = 0, the gate 33 enters an open state, and the transposed note number “D4 # (75)” is supplied from the chord progression supply unit 22 using the table T1. It is converted into a note number “E4 (76)” which is a third sound of the Degree code “IM7”. The note number “E4 (76)” converted here is sent to the selector 34.
[0065]
On the other hand, the root pitch difference detection unit 36 calculates the root sound “C3 (60)” closest to the previous converted note number “D3 (62)” in the delay 37, and calculates the calculated root sound “C3 (60). ) ”And the previous converted note number“ D3 (62) ”are output to the table T2 with j = 2 as j = 2. The table T2 receives the i = 0 signal from the previous pitch difference detection unit 32, receives the j = 2 signal from the root pitch difference detection unit 36, and outputs the offset value “0” to the addition unit 35. . The adder 35 adds the offset value “0” to the root sound “C3 (60)” output from the root pitch difference detector 36, and outputs the note number “C3 (60)” as the converted note number. To do. Since the value of the control signal gate is “0” (gate = 0), the processing of the table T2, the root pitch difference detection unit 36, and the addition unit 35 may be omitted.
[0066]
The selector 34 selects the note number “E4 (76)” converted by the table T1 according to the signal of gate = 0, and selects the note number “E4 (76)” converted to the demodulator 38 and the delay 37 in the subsequent stage. Send it out. The demodulator 38 demodulates the received note number “E4 (76)” to “F” which is the original key (pitch is changed). 5 The note number “A5 (81)” is output to the sound generator 24. The delay 37 temporarily stores the received note number “A5 (81)” for use in processing the next input performance signal.
[0067]
As described above, the pitch difference between the first input note number and the last input note number is “ 0 Or 5 more than( +5 and -5 ”), The sound is converted to the third (or seventh) component sound of the current Degree code using the table T1. Also, the pitch difference from the previously entered note number is `` 2-4 Within ( ± 2 to ± 4 In the case of “within”), the table T2 is used to convert to a scale performance or an arpeggio performance.
[0068]
By doing in this way, a conversion mode can be varied based on the relative pitch difference of the note number (performance information) input. Therefore, it is possible to perform conversion of ad-lib performance reflecting the performer's intention along the current chord.
[0069]
FIG. 8 is a flowchart for explaining the performance assisting process according to the embodiment of the present invention.
[0070]
In step SA1, performance assist processing is started. In step SA2, timing of performance time is started and chord progression management is started. Management of chord progression is performed according to chord progressions prepared and stored in advance.
[0071]
In step SA3, it is determined whether or not the current performance time is the chord progression switching timing. If it is the chord progression switching timing, the process proceeds to step SA4 indicated by a YES arrow, and if it is not the switching timing, the process proceeds to step SA5 indicated by a NO arrow.
[0072]
In step SA4, the table T1 and the table T2 are switched in accordance with the current code (Degree code). Thereafter, in step SA5, the input of a performance signal is detected. When the input of the performance signal is detected, the process proceeds to step SA6 indicated by the YES arrow. When the input of the performance signal is not detected, the process returns to step SA3 indicated by the NO arrow.
[0073]
In step SA6, the note number included in the input performance signal is transposed to CMajor.
[0074]
In step SA7, a pitch difference between the pitch (note number) of the performance signal input this time transposed in step SA6 and the pitch (note number) of the performance signal input and transposed previously is detected.
[0075]
In step SA8, the column reference pointer i of the table T2 and the control signal gate are determined according to the pitch difference detected in step SA7. For example, if the pitch difference detected in step SA7 is “0”, “5” or more or “−5” or less, the column reference pointer i = “0” and the control signal gate = “0”. When the pitch difference detected in step SA7 is “1” or “2”, the column reference pointer i = “1” and the control signal gate = “1”. When the pitch difference detected in step SA7 is “−1” or “−2”, the column reference pointer i = “2” and the control signal gate = “1”. When the pitch difference detected in step SA7 is “3” or “4”, the column reference pointer i = “3” and the control signal gate = “1”. When the pitch difference detected in step SA7 is “−3” or “−4”, the column reference pointer i = “4” and the control signal gate = “1”.
[0076]
In step SA9, whether or not the value of the column reference pointer i determined in step SA8 is “0”, that is, the pitch difference detected in step SA7 is “0”, “5” or more, or “ It is determined whether or not it is −5 ”or less. When the value of the column reference pointer i is “0”, the process proceeds to step SA10 indicated by an arrow “YES”, and when the value of the column reference pointer i is not “0”, the process proceeds to step SA11 indicated by an arrow “YES”. . The branching here is the difference in pitch between the previous input note number and the current input note number. 0 or ± 5 In the above case, as the re-partitioning, the current note number is converted into a sound of the third degree or the seventh degree of the current Degree code and output, and in other cases, the note conversion coefficient corresponding to the pitch difference ( This is for performing note conversion by specifying an offset value.
[0077]
In step SA10, the input note number is converted using the table T1 to obtain a converted note number. Thereafter, the process proceeds to step SA12.
[0078]
In step SA11, the offset value (conversion coefficient) of the note number indicated by the column reference pointer i and the row reference pointer (pitch difference) j is obtained from the table T2, and the calculated offset sound and the calculated root sound (C sound) are obtained. The note number “root” is added to obtain a converted note number. The row of the table T2 that is the difference value between the note number root of the root sound (C sound) closest to the immediately preceding converted note number and the note number root of the root sound (C sound) and the immediately preceding converted note number. The reference pointer (pitch difference) j is determined in later steps SA12 and SA13. If it is the first input note number, step SA10 is inevitably executed. Therefore, when this step SA11 is executed, the root sound root and the row reference pointer i have already been determined.
[0079]
In step SA12, the note number root of the root sound (C sound) closest to the immediately previous converted note number is calculated (root = Int (last converted note number / 12) × 12).
[0080]
In step SA13, a row reference pointer (pitch difference) j of the table T2, which is a difference value between the note number root of the root sound (C sound) calculated in step SA12 and the immediately preceding converted note number, is determined (j = Previous conversion note number-root).
[0081]
In step SA14, the note number converted in step SA10 or step SA11 is demodulated (transposed) to the original tone, and in step SA15, a performance signal including the demodulated converted note number is output.
[0082]
In step SA16, it is determined whether or not the performance is finished. The end of the performance is determined by, for example, a user end instruction. When the performance is finished, the process proceeds to step SA17 indicated by an arrow of YES, and this performance assist process is finished. If the performance has not ended, the process returns to step SA3 indicated by the NO arrow, and the subsequent processing is repeated.
[0083]
As described above, according to the embodiment of the present invention, if the pitch difference is small, it is regarded as a scale-like performance intention and automatically converted, and if the pitch difference is medium, it is regarded as an arpeggio performance intention. Convert automatically. In this way, different processing is performed depending on the pitch difference, so even a performer who has no musical knowledge or no musical instrument experience can easily perform chords while reflecting the performance intention of the performer. You can perform ad-lib performance without any failure in progress.
[0084]
Further, according to the embodiment of the present invention, even a performer with poor musical knowledge can perform according to the music theory without worrying about the music theory or the like.
[0085]
In addition, by preparing multiple types of chord pronunciation distribution tables or chord tone selection tables corresponding to various music genres and musical instruments, it is possible to perform a performance utilizing a wide range of music genres and the characteristics of each instrument. .
[0086]
In the embodiment of the present invention, the input performance signal is once transposed to C Major, and then converted. However, by preparing a table corresponding to each key, the performance input without transposition is prepared. The signal may be converted as it is, or a table corresponding to an arbitrary number of keys may be provided and converted based on a key table closest to the specified key.
[0087]
The performance assisting device 1 of the present embodiment is not limited to the form of an electronic musical instrument, and may be applied to a karaoke device, a game device, a portable communication terminal such as a mobile phone, and an automatic performance piano. When applied to a portable communication terminal, not only when a predetermined function is completed with only the terminal, but also a part of the function is provided on the server side, and the predetermined function is realized as a whole system composed of the terminal and the server. You may make it do.
[0088]
In the case of taking the form of an electronic musical instrument, the form is not limited to the keyboard musical instrument as described in the embodiment, and may be a string musical instrument type, a wind instrument type, a percussion instrument type, or the like. In addition, the sound source device, the automatic performance device, etc. are not limited to those built in one electronic musical instrument body, but each is a separate device, and each device is connected using communication means such as MIDI or various networks. There may be.
[0089]
The present embodiment may be implemented by a general-purpose computer or the like in which a computer program or the like corresponding to the present embodiment is installed.
[0090]
In that case, the computer program corresponding to the present embodiment may be provided to the user in a state in which the computer program is stored in a computer-readable storage medium such as a CD-ROM or a floppy (registered trademark) disk. Good.
[0091]
Although the present invention has been described with reference to the embodiments, the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications, improvements, combinations, and the like can be made.
[0092]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a performance assisting device that can obtain an ad-lib performance output that reflects the player's performance intention.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a hardware configuration of a performance assisting apparatus 1 according to an embodiment of the present invention.
FIG. 2 is a block diagram showing functions of the performance assisting device 1 according to the embodiment of the present invention.
FIG. 3 is a conceptual diagram illustrating an example of a table T1 and a table T2 according to an embodiment of the present invention.
FIG. 4 is a conceptual diagram showing another example of the table T2 according to the embodiment of the present invention.
FIG. 5 is a block diagram illustrating an example of conversion processing of performance information (first sound) input first.
FIG. 6 is a block diagram showing an example of conversion processing of performance information (second and subsequent sounds) input after the second.
FIG. 7 is a block diagram illustrating another example of conversion processing of performance information (second and subsequent sounds) input after the second.
FIG. 8 is a flowchart for explaining performance assistance processing according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Performance auxiliary device, 2 ... Bus, 3 ... RAM, 4 ... ROM, 5 ... CPU, 6 ... Timer, 7 ... External storage device, 8 ... Detection circuit, 9 ... Panel operator, 10 ... Display circuit, 11 ... Display, 12 ... Sound source circuit, 13 ... Effect circuit, 14 ... Sound system, 15 ... Performance operator, 16 ... MIDI I / F, 17 ... Communication I / F, 18 ... MIDI equipment, 19 ... Communication network, 20 ... Server Computer 21. Performance signal input unit 22 Chord progression supply unit 23 Note conversion unit 24 Sound generation unit 31 Transposition unit 32 Previous pitch difference detection unit 33 Gate 34 Selector 35 ... Adding unit, 36 ... Root pitch difference detecting unit, 37 ... Delay, 38 ... Demodulating unit, 39 ... Input storage unit

Claims (3)

Input means for inputting performance information according to a performance operation by the user ;
Code supply means for storing the chord progression and supplying the chord at the current time;
First conversion means for converting first performance information input from the input means into second performance information having a pitch difference of a specific frequency from a root sound of the supplied chord;
The first performance information is output immediately before the offset value determined according to the pitch difference between the performance information input immediately before and the performance information input this time and the performance information output immediately before. Second conversion means for converting to third performance information added to the root sound closest to the performance information;
Pitch difference detection means for detecting a pitch difference in semitone units between the performance information input immediately before from the input means and the performance information input this time;
When the first performance information is performance information inputted first and when the detected pitch difference is 0 or 5 or more, the first performance information is converted into the first conversion means. Conversion means selection means for causing the second conversion means to convert the first performance information when the detected pitch difference is within 1 to 4 ,
A performance assisting device comprising: output means for outputting performance information converted by the first conversion means or the second conversion means selected by the conversion means selection means .   The second conversion means performs either scale-like pitch conversion or arpeggio-type pitch conversion according to the pitch difference between the performance information input immediately before and the performance information input this time. Item 2. The performance assisting device according to Item 1. An input procedure for inputting performance information in response to a performance operation by the user ;
A chord supply procedure for storing chord progressions and supplying chords at the current time;
A first conversion procedure for converting first performance information input from the input procedure into second performance information having a pitch difference of a specific frequency from a root sound of the supplied chord;
The first performance information is output immediately before the offset value determined according to the pitch difference between the performance information input immediately before and the performance information input this time and the performance information output immediately before. A second conversion procedure for converting to third performance information added to the root sound closest to the performance information;
A pitch difference detection procedure for detecting a pitch difference in semitone units between the performance information input immediately before from the input procedure and the performance information input this time;
When the first performance information is performance information inputted first and when the detected pitch difference is 0 or 5 or more, the first performance information is converted into the first conversion means. A conversion procedure selection procedure for causing the second conversion procedure to convert the first performance information when the detected pitch difference is within 1 to 4 ,
A performance assist process having an output procedure for outputting performance information converted by the first conversion procedure or the second conversion procedure selected by the conversion means selection procedure from the output means is executed on a computer Program to let you.

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