JPH07121162A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To provide the electronic musical instrument which makes the tempo of reproduced music irrelevantly to the reproduced pitch and further does not perform the pitch conversion of a specific musical performance part. CONSTITUTION:A CPU 2 reads a pitch conversion ON/OFF flag for discriminating whether or not pitch conversion is done and sequence data consisting of at least a sounded pitch note and sounding timing T out of a ROM 3. When the pitch conversion on/off flag specifies the pitch conversion, the CPU 2 performs the pitch conversion of the sounded pitch note on the basis of pitch information supplied from a keyboard 1 corresponding to playing operation and supplies it to a sound source 6 in synchronism with a specific tempo clock. Consequently, the tempo of the reproduced music is made constant irrelevantly to the reproduced pitch, and the pitch conversion of the specific musical performance part is not performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument suitable for use in music genres called "house" and "techno", for example.

[0002]

2. Description of the Related Art In recent years, a PC sampling a tone signal
Various electronic musical instruments that store M data in a memory and synthesize a musical sound based on the PCM data read from the memory have been put into practical use. This type of electronic musical instrument is called a "sampler" and includes a sound source configured by a well-known waveform memory reading method. The sound source mounted on this sampler often synthesizes musical sounds based on the pitch synchronization method. The pitch synchronization method referred to here is a method in which the read cycle for reading the PCM data stored in the waveform memory is variably controlled according to the pitch (playback pitch) to be sounded. Therefore, in a sampler equipped with a sound source based on a pitch synchronization method, for example, a sampled musical piece of a predetermined phrase is assigned to each key, and when a waveform is read out in response to a key depression, the pitch of the key depressed is corresponded. Then, the read cycle changes, which changes the playback pitch of the phrase-sampled music.

[0003]

In the musical genres called "house" and "techno", a phrase-sampled music piece is assigned to each key, and the reproduced pitch of the music piece is changed according to the key pressing operation. Controlled phrase playback is often used. When the conventional sampler described above is used for such a playing mode, the playback pitch of the music can be controlled in accordance with a key depression operation, but the read cycle of the waveform memory changes according to the playback pitch, so the tempo of the music also changes. There is a problem of change. Especially in disco music such as "house" and "techno", the tempo of the music is also a factor that expresses the "nori" of the performance. It is desired to be constant regardless.

In addition, in the genres such as "house" and "techno", it is required to reproduce a phrase so that only the rhythm performance part is not pitch-converted, but in the conventional sampler, each phrase-sampled performance part is reproduced. Since the pitch conversion is uniquely performed, there is an adverse effect that it is not possible to prevent only the specific performance part from performing the pitch conversion. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electronic musical instrument capable of keeping the tempo of a reproduced musical piece constant regardless of the reproduced pitch and preventing the pitch conversion of a specific performance part.

[0005]

In order to achieve the above object, in the invention according to claim 1, the conversion designation data for identifying the presence / absence of pitch conversion and at least the sounding pitch and the sounding timing are used. Performance information storage means for storing the performance data to be formed, pitch designation means for generating pitch information representing a pitch from the outside, and performance data stored in the performance information storage means in synchronization with a predetermined tempo. When the conversion designation data stored in the performance information storage means designates pitch conversion, the tone pitch forming the performance data is set according to the pitch information from the pitch designation means. It is characterized in that it is provided with a musical tone control means for performing high conversion.

According to the second aspect of the present invention, the musical tone control means offsets the difference between the reference pitch of the performance data and the pitch information to the pitch of the musical performance data. It is characterized by high conversion. Further, according to the invention described in claim 3, conversion designation data which is data provided for each of a plurality of performance patterns representing a performance mode and which identifies the presence or absence of pitch conversion for each performance part forming the performance pattern. And performance information storage means provided for each of the plurality of performance patterns, which stores performance data for each performance part, which is formed from at least a pitch and a sounding timing, and the performance information storage means. Performance pattern selecting means for selecting any of the performance patterns, pitch specifying means for generating pitch information representing a pitch from the outside, and the conversion specification corresponding to the performance pattern selected by the performance pattern selecting means. The data and the performance data for each performance part are read from the performance information storage means, and the performance data for each performance part is sequentially stored. Musical tone control means for supplying the musical tone generating means in synchronism with the tempo of the musical tone generation means, wherein the musical tone control means is based on the pitch information only for the musical performance data of the musical performance part whose pitch conversion is designated by the conversion designating data. The feature is that the pitch conversion is performed and output, and the performance data for which the pitch conversion is not designated is output as it is.

[0007]

According to the present invention, the musical tone control means includes conversion designation data for identifying the presence or absence of pitch conversion from the performance information storage means,
At least the performance data formed from the pitch and the timing of the sound is read. When the conversion designation data designates pitch conversion, the musical tone control means pitch-converts the sounded pitch based on the pitch information supplied from the pitch designating means in response to a performance operation, and the predetermined pitch is set. Is supplied to the musical sound generating means in synchronization with the tempo. This makes it possible to keep the tempo of the reproduced music constant regardless of the reproduced pitch and to prevent specific performance data from being converted in pitch.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. A. Configuration of Embodiment FIG. 1 is a block diagram showing a configuration of an electronic musical instrument according to an embodiment of the present invention. In this figure, 1 is a keyboard,
The key release and key release speed for each key is detected, and performance information such as a key-on signal, a key number, a key-off signal, or velocity representing a touch and release touch is output. Reference numeral 2 is a CPU that controls each part of the musical instrument, and its operation will be described later. A ROM 3 stores various control programs loaded into the CPU 2 and various data used in these programs.

Now, the performance data PD stored in the ROM 3 will be described with reference to FIGS. 2 and 3. The performance data PD is so-called automatic performance information, and is formed of various performance patterns such as “jazz”, “pops”, and “house”, and performance information for each of these performance patterns. As shown in FIG. 2, the performance data PD is composed of a header part HD storing the control information of the performance pattern and a sequence data part SD representing the performance information. The header portion HD is composed of a total pattern number PN that represents the total number of stored performance patterns and performance patterns P _{1 to} P _{n corresponding} to the total pattern number PN. The performance patterns P _{1 to} P _n are respectively drum part pitch conversion on / off flags DPF,
Base part pitch conversion on / off flag BPF and codes 1 to n part pitch conversion on / off flag CPF1
With CPFn. The meaning of the pitch conversion on / off flags DPF, BPF, and CPF for each part will be described later. Further, each performance pattern P is provided in the header HD.
Address information designating a read start address of the sequence data section SD corresponding to each of _{1 to} P _n is registered.

The sequence data section SD is composed of sequence data DSD, BSD, CSD for each performance part corresponding to each performance pattern P ₁ -P _n . The data format of these sequence data DSD, BSD, CSD will be described with reference to FIG. The sequence data DSD, BSD, and CSD are performance information representing music for a predetermined phrase, and are composed of a sounding timing T, a tone color number tn, a status sta, a sounding pitch note, and a sounding velocity vel. Note that each of these pieces of information is formed with a data length of 16 bits and is represented by a hexadecimal number in the figure.

The tone generation timing T represents a tempo clock count value generated by the CPU 2. The tone color number tn is information designating the tone color of a musical tone to be generated,
Specifically, the type of waveform data to be read is designated. The status sta is information designating "pronunciation", "mute" or "end". For example, the upper 4 bits designate "pronunciation", "mute" or "end", and the lower 4 bits specify. Specify the pronunciation channel. The tone pitch note specifies the pitch of the musical tone to be pronounced. The pronunciation velocity vel specifies the pronunciation intensity (volume).

Next, the configuration of the embodiment will be described again with reference to FIG. In FIG. 1, reference numeral 4 denotes a RAM used as a work area of the CPU 2, in which various calculation results, register / flag data, and part of the performance data PD described above are temporarily stored. Reference numeral 5 denotes an operation panel of this electronic musical instrument, which is composed of various operation switches and a liquid crystal display section for displaying each switch setting state and the like. Among the various operation switches, for example, a pattern selection switch for selecting any of the performance patterns P _{1 to} P _n in the performance data PD described above is provided.

Reference numeral 6 is a sound source constituted by a well-known waveform memory reading method. The sound source 6 is provided with a plurality of simultaneous tone generation channels for polyphonic sound generation, and these tone generation channels are assigned to the performance parts of "drum", "bass" and "chord" and the normal melody performance. That is, the sound source 6 synthesizes the musical sound of each part of "drum", "bass", and "chord" on the basis of the sequence data DSD, BSD, CSD supplied from the CPU 2, while producing musical performance information corresponding to a key depression operation. The melody performance sound that complies is synthesized and output. Reference numeral 7 denotes an amplifier for performing various filtering on the tone signal output from the sound source 6 to remove unnecessary noise and adding a sound effect, and then amplifying the amplified noise and outputting it to the speaker 8 of the next stage.

B. Operation of Embodiment Next, the operation of the embodiment having the above configuration will be described with reference to FIGS.
This will be described with reference to 0. Here, first, the operation of the main routine will be briefly described, and then a timer interrupt routine that interrupts according to the tempo clock, a key pressing processing routine called in the main routine, and a code part called in this key pressing processing routine. Each operation of the / drum part / bass part sound generation processing routine and the key release processing routine will be sequentially described.

(1) Operation of Main Routine First, when the electronic musical instrument according to this embodiment is powered on, the CPU 2 loads a predetermined control program from the ROM 3 and activates the main routine shown in FIG. Proceed to. In step SA2, RAM4
The various registers and flags set in the above are reset, and a part of the corresponding performance data PD is stored in the ROM based on the setting status of the pattern selection switch described above.
3 is read and written in a predetermined storage area of the RAM 4.

When the initialization is performed in this way, the processing of the CPU 1 proceeds to the next step SA4 and executes the key depression processing. Here, when a key-depressing operation is performed in the right key range having a higher pitch relationship than the key-division key SPLT, performance information (key-on signal, key number and velocity) output from the keyboard 1 in response to the key-depressing operation. A normal key depression process for supplying the sound source 6 to the sound source 6 is performed. On the other hand, the key range division key SPLT
When a key depression operation is performed in the left key range having a lower pitch relationship, the corresponding sequence data section SD is phrase-reproduced based on the header section HD of the performance data PD corresponding to the key depression operation.

Next, when the key is released, the CPU 2 proceeds to step SA6, mutes the musical tone generated according to the key depression, and proceeds to the next step SA8. Step SA
At 8, the switch scanning for detecting various switch operations of the operation panel 5 and other processing such as updating and displaying the liquid crystal display unit according to the switch scanning result are performed. After that, the processing of the CPU 2 returns to step SA4 again, and thereafter, steps SA4 to SA8 are repeated to execute the processing corresponding to the key pressing operation and the switch operation.

(2) Operation of Timer Interrupt Routine By the way, in the process of executing the above-mentioned main routine, the CPU 2 synchronizes with the tempo clock every time it is generated (or the tempo clock supplied from the outside), as shown in FIG. The timer interrupt routine shown is started, and the process proceeds to step SB2. In step SB2, it is determined whether or not the register KOF is "1". here,
The register KOF temporarily stores a key-on flag indicating the presence or absence of key depression. When the flag is "1", the key depression is indicated, and otherwise it is "0".

When the key depression operation is not performed, the key-on flag of the register KOF becomes "0". In this case, the determination result of step SB2 is "NO", and the processing of the CPU 2 ends the timer interrupt routine and returns to the main routine described above. On the other hand, when the key is depressed, the key-on flag of the register KOF becomes "1",
Since the determination result is "YES", the CPU 2 advances the process to the next step SB4. In step SB4, the value of the register T1 is incremented by 1, the routine is completed, and the process returns to the main routine. As described above, the timer interrupt routine calculates the number of tempo clocks generated during key depression. This tempo clock number is used for sounding timing at the time of phrase reproduction described later.

(3) Operation of the key depression processing routine Next, the operation of the key depression processing routine will be described with reference to FIG. In this processing, a normal key depression processing that is executed when a key having a pitch relationship higher than the key range division key SPLT and a key having a pitch relationship lower than the key range division key SPLT are pressed. The description will proceed by classifying it into the key depression process at the time of phrase reproduction that is executed. In the following description, a key range having a pitch relationship higher than the key range division key SPLT is defined as a right key range, and a key range having a pitch relationship lower than the key range division key SPLT is defined as a left key range. This corresponds to the melody performance performed by the performer's right hand and the accompaniment performance performed by the left hand. Normal Key Pressing Process As described above, when the process of the CPU 2 proceeds to step SA4, the key pressing process routine shown in FIG. 5 is activated and step SC2 is executed. In step SC2, it is determined whether or not a new key depression operation has been performed on the keyboard 1. Now
For example, when the player presses a predetermined key, the result of the judgment here is "YES", and the next step SC4
Proceed to.

At step SC4, the CPU 2 determines whether or not the key number of the depressed key is in a lower pitch relationship than the key range division key SPLT based on the performance information supplied from the keyboard 1, that is, the above-mentioned. It is determined whether or not it is a key depression operation in the left key range. In this case, since the right key range is depressed as a normal key depression, the determination result is "NO", and the routine proceeds to step SC6. Then, in step SC6, the note pitch not corresponding to the key number of the depressed key is generated.
e, the velocity vel indicating the key touch and the tone color data are sent to the sound source 6, and then at step SC8, the generation of the musical tone is instructed. As a result, a musical tone corresponding to the performance information output from the keyboard 1 is produced.

Key Depression Processing During Phrase Reproduction In step SC4 described above, for example, the player depresses a key in the left key range. Then, step SC
The determination result of 4 is "YES", and the process of the CPU 2 proceeds to step SC10. At step SC10, the key-on flag indicating the presence or absence of key depression is set to "1" and the register KO is set.
The value of the register T1 is reset to zero while being set to F. Next, in step SC12, it is determined whether the value of the register KF is "1". In this register KF, a sounding flag indicating whether or not sounding by pressing the previous key is continuing is set, and when the flag value is "1", it indicates that sounding is continuing and "0". "Indicates that the pronunciation is completed. Therefore, in this step SC12, it is judged whether or not the sound generation by the previous key depression is continuing.

Now, for example, when the sound generated by pressing the previous key is continuing, the judgment result is "YES" and the routine proceeds to step SC14. In step SC14, the sound source 6 is instructed to mute (key off) the currently sounding channel, and the process proceeds to step SC18. On the other hand, when the pronunciation by pressing the front key is completed, that is,
When the value of the register KF is "0", step SC12
The result of the determination is "NO", and the processing of the CPU 2 proceeds to step SC16. In step SC16, the tone generation flag "1" is set in the register KF to start the tone generation in response to the current key depression, and then the process proceeds to step SC18.

In step SC18, the difference between the key number of the key pressed in the left key range and the key number corresponding to the reference pitch of the sequence data section SD is calculated and written in the register SD. For example, if the reference pitch of the sequence data section SD is C4, the key number corresponding to this is "60". When the key number of the key pressed in the left key range is "53 (F3 sound)", this difference "-7" is set in the register SD.
That is, the register SD contains the sequence data section SD.
Sequence data DSD, BSD, CSD constituting the
The pitch shift amount used when the phrase is reproduced (see FIG. 2) is set.

Next, at step SC20, _{one of the} performance patterns P _{1 to} P _n designated by the pattern selection switch is read out from the header section HD described above.
Here, for example, it is assumed that the performance pattern P ₁ is read from the header portion HD shown in FIG. Then the CPU
2 sequentially reads the drum part pitch conversion on / off flag DPF, the bass part pitch conversion on / off flag BPF, and the chord part pitch conversion on / off flag CPF which form the performance pattern P ₁ from the ROM 3, and expands these flags in the RAM 4.

These flags DPF, BPF and CPF are
This is a flag for instructing whether or not the sequence data DSD, BSD, CSD should be phrase-reproduced in consideration of the pitch shift amount set in the register SD. If the flag value is "1", the sequence is determined according to the pitch shift amount which is the difference between the key number of the key pressed in the left key range and the key number corresponding to the reference pitch of the sequence data section SD described above. This indicates that the pitch of the data DSD, BSD, and CSD is converted and the phrase is reproduced. On the other hand, if the flag value is "0", the sequence data DSD, BSD, C
The phrase is reproduced as it is without converting the pitch of SD.

Therefore, in step SC22, a "chord part tone generation process" for reproducing the phrase of the sequence data CSD according to the chord part pitch conversion on / off flag CPF and the pitch shift amount is performed. In step SC24, the sequence data D is converted according to the drum part pitch conversion on / off flag DPF and the pitch shift amount.
"Drum part sound generation processing" for phrase reproduction of SD is performed. Further, in step SC26, a "bass part tone generation process" is performed in which the sequence data BSD is phrase-reproduced according to the bass part pitch conversion on / off flag BPF and the pitch shift amount. Details of these sound generation processes will be described later.

As described above, in the key-depression processing routine, the tone generator 6 is instructed to generate a musical tone in response to the key-depression operation in the right key range, and when the key-depression operation in the left key range is performed, the pitch conversion ON / OFF flag and The phrase is reproduced in the sequence data section SD in consideration of the pitch shift amount. In this key depression processing routine, if the result of the determination in step SC2 described above is "NO", that is, if there is no new key depression, the operation proceeds to step SC28, and the value of the register KOF is "1". To judge. Here, if the value of the register KOF is "1", it is considered that the previous key depression is continued, and the determination result is "YES", and the step S22, SC2
4, sound generation processing of each performance part of SC26 is continued. On the other hand, when the value of the register KOF is "0", that is, when the key depression operation is not performed, the determination result is "NO", and therefore the processing of the CPU2 ends the routine and returns to the main routine. become.

(4) Operation of Sound Generation Processing Routine Next, the operation of each sound generation processing routine of chord part / drum part / bass part called in the key depression processing routine will be described. Note that these tone generation processing routines are performed in step SC20 of the above-described key depression processing routine.
The tone generation processing mode of each performance part is determined according to the contents of the header part HD read in. In the following, for example,
Each flag DP constituting the read performance pattern P ₁
F, BPF and CPF are "0", "1" and "1" respectively
The pronunciation process in the case of is described. That is, the chord part and the base part have flags CPF and BP.
Since both F are "1", the phrase reproduction is performed in which the pitch of the sequence data CSD and BSD is converted according to the pitch of the depressed key. On the other hand, the drum part is flag DP
Since F becomes "0", the sequence data DSD is sounded as it is, regardless of the pitch of the depressed key. The operation for realizing such processing will be described below.

Operation of Chord Part Sound Generation Processing Routine As described above, when the processing of the CPU 2 in the key pressing processing routine proceeds to step SC22, the chord part sound generation processing routine shown in FIG. 8 is activated and step SD2 is executed. In step SD2, the data CSD is read based on the read address of the sequence data CSD obtained by reading the header HD. Next, when proceeding to the next step SD4, it is judged whether or not the tone generation timing T of the read sequence data CSD matches the tempo clock number of the register T1, that is, it is the tone generation timing of the sequence data CSD. Here, if it is not the sounding timing, the determination result is “NO”.
Then, this routine ends.

On the other hand, if it is the sounding timing, the determination result is "YES", and the process proceeds to the next step SD8. When the processing of the CPU 2 proceeds to step SD8,
Status sta forming sequence data CSD
A process is selected according to the contents of (see FIG. 3). As described above, the status sta specifies that the upper 4 bits are “pronounce”, “mute”, or “end”.
The lower 4 bits are the information designating the sounding channel.
Here, for example, when the status sta specifies "pronunciation", the process of the CPU 2 proceeds to the next step SD10. In step SD10, it is determined whether the chord part pitch conversion flag CPF is "1". At this time, since the flag CPF is set to "1" according to the above-described example, the determination result is "YES", and the process proceeds to the next step SD12. The flag CPF is “0”.
If it is, the judgment result here is “NO”,
It proceeds to step SD14 described later.

In step SD12, the pitch shift amount stored in the register SD is added to the sounding pitch note (key number) forming the sequence data CSD, and the value of the register note storing the key number is offset. Then, when the processing proceeds to step SD14, the CPU
2 is a key number obtained by offsetting the sounding pitch note (key number) by the pitch shift amount, and a tone color number tn (FIG. 3).
(See) and the sound volume vel are transmitted to the sound source 6, respectively. As a result, the sound source 6 phrase-reproduces the sequence data CSD according to the pitch shift amount. Next, when proceeding to step SD16, the CPU 2 reads the next sequence data CSD, so after incrementing the read address, the process returns to step SD2 and repeats the above-mentioned steps SD2 to SD14. As a result, the chord performance part is phrase-reproduced in synchronization with the tempo clock. That is, the sequence data CSD is phrase-reproduced at a constant tempo regardless of the reproduced pitch.

By the way, when the status sta indicates "mute" during the phrase reproduction for converting the pitch of the sequence data CSD in response to the key depression operation as described above, the branch processing of step SD8 causes C
PU2 advances the process to step SD18. Step S
At D18, a key-off signal is supplied to the sound source 6 so as to mute the tone generation channel designated by the lower 4 bits of the status sta, that is, the tone generation channel that is generating the chord part. As a result, the sound source 6 stops sounding.
Then, after this, the CPU 2 advances the processing to step SD16, increments the read address, and proceeds to step S
Repeat after D2. And sequence data CSD
When the status sta in step S6 indicates “end”, the CPU 2 executes step S8 through the branch process in step S8.
The process proceeds to D20. In step SD20, the value of the register T1 is reset to zero, and then the read address is returned to the initial value.

Operation of Drum Part Sound Generation Processing Routine When the chord part sound generation processing routine described above is completed,
The CPU 2 activates the drum part tone generation processing routine shown in FIG. 9 and executes step SE2. At step SE2, based on the read address of the sequence data DSD obtained by reading the header part HD, the data D
Read SD. Next, when proceeding to the next step SE4, it is determined whether or not the tone generation timing T of the read sequence data BSD matches the tempo clock number of the register T1, that is, whether it is the tone generation timing of the sequence data DSD. Here, if it is not the sounding timing, the determination result is "NO", and this routine is ended.

On the other hand, if it is the sounding timing, the determination result is "YES", and the process proceeds to the next step SE8. When the processing of the CPU 2 proceeds to step SE8,
Status sta forming sequence data DSD
A process is selected according to the contents of (see FIG. 3). here,
For example, when the status sta specifies "pronunciation", the process proceeds to the next step SE10. In step SE10, it is determined whether or not the drum part pitch conversion flag DPF is "1". At this time, the flag DPF is set to "0" according to the above-described example, the determination result is "NO", and the process proceeds to step SE14.

At step SE14, the note pitch no
te (key number) and tone color tn (see FIG. 3)
And the sound volume vel are sent to the sound source 6, respectively. As a result, the sound source 6 reproduces the phrase as it is without converting the pitch of the sequence data DSD. Next, when proceeding to step SE16, the CPU 2 reads the next sequence data DSD, so after incrementing the read address, it returns to step SE2 and repeats steps SE2 to SE14 sequentially. As a result, the phrase of the drum performance part is reproduced in synchronization with the tempo clock. That is, the sequence data DSD is phrase-reproduced at a constant tempo without pitch conversion.

By the way, in the case where the phrase data of the sequence data CSD is reproduced as it is in response to the key depression operation as described above, if the status sta indicates "mute", the CPU performs the branch processing of step SE8 as described above.
2 advances the processing to step SE18. Step SE1
At 8, the key-off signal is supplied to the sound source 6 so as to mute the tone generation channel designated by the lower 4 bits of the status sta, that is, the tone generation channel which is producing the drum part. As a result, the sound source 6 stops sounding. Then
After that, the CPU 2 advances the processing to step SE16, increments the read address, and repeats step SE2 and thereafter. Then, when the status sta in the sequence data DSD indicates "end", step S
By the branch processing of E8, the CPU 2 advances the processing to step SE20. In step SE20, the value of the register T1 is reset to zero, and then the read address is returned to the initial value.

Operation of Bass Part Sound Generation Processing Routine When the drum part sound generation processing routine described above is completed,
The CPU 2 activates the drum part tone generation processing routine shown in FIG. 10 and executes step SF2. Step SF2
Then, the data BSD is read based on the read address of the sequence data BSD obtained by reading the header HD. Next, proceeding to the next step SF4, it is determined whether or not the tone generation timing T of the read sequence data BSD matches the tempo clock number of the register T1, that is, whether it is the tone generation timing of the sequence data BSD. Here, if it is not the sounding timing, the determination result is "NO", and this routine is ended.

On the other hand, if it is the sounding timing, the determination result is "YES", and the process proceeds to the next step SF8. When the processing of the CPU 2 proceeds to step SF8,
Status sta forming sequence data BSD
A process is selected according to the contents of (see FIG. 3). here,
For example, when the status sta specifies "pronunciation", the process of the CPU 2 proceeds to the next step SF10. In step SF10, the bass part pitch conversion flag B
It is determined whether the PF is “1”. At this time, since the flag BPF is set to "1" according to the above-described example, the determination result is "YES", and the next step SF1
Go to 2. When the flag BPF is "0", the determination result here is "NO", and the process proceeds to step SF14 described later.

In step SF12, the pitch shift amount stored in the register SD is added to the tone pitch note (key number) forming the sequence data BSD, and the value of the register note storing the key number is offset. Then, when the processing proceeds to step SF14, the CPU
2 is a key number obtained by offsetting the sounding pitch note (key number) by the pitch shift amount, and a tone color number tn (FIG. 3).
(See) and the sound volume vel are transmitted to the sound source 6, respectively. As a result, the sound source 6 phrase-reproduces the sequence data BSD according to the pitch shift amount. Next, when proceeding to step SF16, the CPU 2 reads the next sequence data BSD, so after incrementing the read address, it returns to step SF2 and repeats the above-mentioned steps SF2-SF14 in sequence. As a result, the bass playing part is phrase-played in synchronization with the tempo clock. That is, the sequence data BSD is phrase-reproduced at a constant tempo regardless of the reproduction pitch.

By the way, when the status sta indicates "mute" during the phrase reproduction for converting the pitch of the sequence data BSD according to the key depression operation in this way, the branch processing of step SF8 causes the C
PU2 advances the process to step SF18. Step S
In F18, a key-off signal is supplied to the sound source 6 so as to mute the sound generation channel designated by the lower 4 bits of the status sta, that is, the sound generation channel in which the bass part is sounding. As a result, the sound source 6 stops sounding.
Then, after this, the CPU 2 advances the processing to step SF16, increments the read address, and executes step S16.
Repeat after F2. And the sequence data BSD
When the status status in step S8 indicates “end”, the branch process of step SF8 causes the CPU 2 to execute step S
The process proceeds to F20. In step SF20, the value of the register T1 is reset to zero, and then the read address is returned to the initial value.

As described above, in each of the tone part processing routines of the chord part / drum part / bass part, the chord part pitch conversion on / off flag CPF,
Based on the drum part pitch conversion on / off flag DPF and the bass part pitch conversion on / off flag BPF,
Whether or not there is pitch conversion of the sequence data CSD, DSD, and BSD is identified, and when the pitch conversion is performed, the volume shift amount is offset to the sounding pitch note of the sequence data, and phrase reproduction is performed. At this time, since the phrase reproduction is performed in synchronization with the tempo clock, it is possible to avoid the problem that the tempo of the phrase reproduced music changes in accordance with the reproduced pitch. Moreover, since each performance part is provided with a flag for identifying the presence or absence of pitch conversion, it is possible to reproduce the sequence data as it is without converting the pitch of a specific performance part.

(5) Operation of Key Release Processing Routine Next, the operation of the key release processing routine will be described with reference to FIG. Now, for example, when the key is released in the situation where the phrase reproduction is performed by each of the above-described tone generation processing routines by pressing a predetermined key, the determination result of step SG2 becomes "YES". That is, in step SG2, the key release is determined based on whether the key-off signal is supplied from the keyboard 1. When the key release is detected, the process proceeds to step SG4, and the key off is instructed to the tone generation channel corresponding to the sequence data (or the key number of the key pressed in the right key range) which is currently being sounded. Then, step S
When the process proceeds to G6, the tone generation flag set in the register KF is reset to zero to indicate that the tone generation is completed. Next, CP
U2 advances to step SG8, and indicates the key-off state by setting the key-on flag set in the register KOF to "0". Then, the key release processing routine is completed and the process returns to the main routine (see FIG. 4).

As described above, according to the above-described embodiment, the sounds of the sequence data CSD, DSD, and BSD are generated based on the chord part pitch conversion on / off flag CPF, the drum part pitch conversion on / off flag DPF, and the base part pitch conversion on / off flag BPF. Since the presence or absence of the high conversion is identified, it becomes possible to reproduce the sequence data as it is without converting the pitch of a specific performance part. When pitch conversion is performed in response to a key depression operation, phrase reproduction is performed in which the volume shift amount is offset to the sounding pitch note of the sequence data. Since the phrase is reproduced in synchronization with the tempo clock, the tempo of the music can be kept constant regardless of the reproduced pitch.

In the above-described embodiment, the presence / absence of pitch conversion is identified according to the on / off flag provided in the header portion HD of the performance data PD.
Instead of this, for example, a flag for identifying the presence or absence of chord conversion, a flag for changing the playing patterns P _{1 to} P _n, and the like are provided, and the chord conversion is performed in response to a key depression operation, or the playing patterns P ₁ to It is also possible to realize processing such as changing P _n . By doing so, it is possible to increase the variation of the playing mode and obtain a new feeling of playing.

[0046]

According to the present invention, the musical tone control means reads out from the performance information storage means conversion designation data for identifying the presence or absence of pitch conversion, and performance data formed at least of the sounding pitch and sounding timing. When the conversion designation data designates pitch conversion, the musical tone control means performs pitch conversion of the sounded pitch based on pitch information supplied from the pitch designating means in response to a performance operation, Since this is supplied to the musical tone generating means in synchronization with a predetermined tempo, it is possible to keep the tempo of the reproduced music constant regardless of the reproduced pitch, and to prevent specific performance data from being pitch-converted. .

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is a memory map diagram showing a data structure of performance data PD stored in a ROM 3 in the embodiment.

FIG. 3 is a diagram showing a data format of a sequence data section SD forming performance data PD.

FIG. 4 is a flowchart for explaining the operation of a main routine in the embodiment.

FIG. 5 is a flowchart for explaining the operation of a key depression processing routine in the embodiment.

FIG. 6 is a flowchart for explaining the operation of the timer interrupt routine in the embodiment.

FIG. 7 is a flowchart for explaining an operation of a key release processing routine in the embodiment.

FIG. 8 is a flowchart for explaining the operation of the chord part sound generation processing routine in the embodiment.

FIG. 9 is a flowchart for explaining the operation of a drum part sound generation processing routine in the embodiment.

FIG. 10 is a flow chart for explaining the operation of a bass part sound generation processing routine in the embodiment.

[Explanation of symbols]

 1 keyboard (pitch specifying means) 2 CPU (tone control means) 3 ROM (performance information storage means) 4 RAM (tone control means) 5 operation panel 6 sound source (tone generation means) PD performance data HD header section (conversion designation data) ) SD sequence data section (performance data)

Claims (3)

[Claims] 1. Performance information storage means for storing conversion designation data for identifying the presence or absence of pitch conversion, performance data formed of at least sounded pitch and sounding timing, and pitch information representing pitch from the outside. And the pitch designation means for generating the pitch data, the performance data stored in the performance information storage means are sequentially output in synchronization with a predetermined tempo, and the conversion designation data stored in the performance information storage means performs pitch conversion. When designated, the electronic musical instrument is provided with a musical tone control means for converting a pitch of a tone pitch forming the performance data according to pitch information from the pitch designation means. 2. The musical tone control means performs pitch conversion by offsetting a difference between a reference pitch of the performance data and the pitch information to a sounding pitch of the performance data. Electronic musical instrument described. 3. Data which is provided for each of a plurality of performance patterns representing a performance mode, conversion designation data for identifying the presence or absence of pitch conversion for each performance part which constitutes the performance pattern, and each of the plurality of performance patterns. And a performance information storage means for storing performance data for each performance part formed of at least a pitch and a sounding timing, and one of the performance patterns stored in the performance information storage means. Performance pattern selecting means for selecting, pitch specifying means for generating pitch information representing a pitch from the outside, the conversion specifying data corresponding to the performance pattern selected by the performance pattern selecting means, and each performance part The performance data is read from the performance information storage means, and the performance data for each performance part is sequentially synchronized with a predetermined tempo to produce musical tones. The musical tone control means for supplying the musical tone to the generating means, and the musical tone control means pitch-converts only the performance data of the performance part whose pitch conversion is designated by the conversion designation data based on the pitch information, and outputs it. In addition, the electronic musical instrument is characterized in that the performance data that is not designated for pitch conversion is directly output.