JPH0721718B2 - Electronic musical instrument - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument having a plurality of tone forming channels, and more particularly to a technique for assigning tone type specifying information to the tone forming channels.

SUMMARY OF THE INVENTION In the present invention, when a tone type to be generated is assigned to any one of a plurality of tone forming channels and a tone signal corresponding to the tone type is generated, the tone generation is performed for each channel to which the tone type has been assigned. By measuring the remaining time and assigning a new musical tone type to the channel with the least remaining pronunciation time, it is possible to perform a performance faithful to the musical tone type designation with a small number of channels.

[Prior Art] Conventionally, a rhythm playing device is provided with a plurality of rhythm sound forming channels (rhythm sound sources) respectively corresponding to a plurality of kinds of rhythm sounds (for example, cymbals, drums, snare drums, etc.). It is known that a rhythm sound is generated from a rhythm sound forming channel corresponding to the above (see, for example, Japanese Utility Model Publication No. 59-18471).

[Problems to be Solved by the Invention] According to the above-mentioned conventional technique, since the rhythm sound type and the rhythm sound forming channel have a one-to-one correspondence, it is attempted to increase the kinds of rhythm sounds that can be produced. In that case, it is necessary to add more rhythm sound forming channels,
There is a problem that the configuration becomes complicated.

As one means for solving such a problem,
It is conceivable to provide a plurality of predetermined (for example, eight) rhythm sound forming channels and appropriately allocate a plurality (for example, 16) of rhythm sound types to these channels for sound generation. In this case, for example, a new rhythm sound cannot be generated while all 8 channels are being sounded, and performance expression is restricted in rhythm performance with a fast tempo or rhythm sound generation at short time intervals. was there.

[Means for Solving Problems] An object of the present invention is to enable generation of various kinds of musical sounds in a short time without increasing the number of channels.

The electronic musical instrument according to the present invention is (a) sound source means having a plurality of N musical tone forming channels, and corresponds to a designated musical tone type among a plurality M (M> N) musical tone types for each musical tone forming channel. And (b) a designating means for generating musical tone type designating information for designating a musical tone type to be pronounced among the plurality of M musical tone types, and (c) this designating means. Each time the musical tone type designation information is generated from the musical tone type designation information, the musical tone type designation information is assigned to any one of the N musical tone formation channels. Assigning means for designating, (d) storage means for storing truncate control information corresponding to the length of the tone generation period for each tone type among the plurality of tone types M, (e) The truncation control information corresponding to the musical tone type designated for each musical tone formation channel assigned by this means is read from the storage means, and a constant value is subtracted from the value indicated by the truncated control information at predetermined time intervals And (f) the constant value is constant regardless of the type of musical sound, and the constant value is constant based on the remaining sound generation time measured by the measuring means. Control means for controlling the channel assignment of the assigning means, which controls the channel assignment so that new tone type designation information from the designation means is assigned to the tone forming channel with the shortest remaining tone generation time. Is.

In such a configuration, rhythm performance may be enabled by using musical tones as percussion instrument sounds (rhythm sounds).

[Operation] According to the configuration of the present invention, the remaining tone generation time is measured for each channel to which the tone generation type has been assigned, and a new tone type is assigned to the channel with the least tone generation time. When a new musical tone type is designated while all are being sounded, this musical tone type is assigned to the channel with the shortest remaining tone generation time and is sounded.

Therefore, even if the number of channels is not particularly increased, it is possible to generate more kinds of musical sounds than the number of channels within a short period of time, and it is possible to express a musical performance at a fast tempo or at short time intervals, for example, in a rhythm performance.

[Embodiment] FIG. 1 shows a structure of an electronic musical instrument according to an embodiment of the present invention. In this electronic musical instrument, a manual performance sound is generated based on a keyboard operation, a rhythm pattern is written in a program mode, and a manual rhythm is generated. The generation of sounds and autorhythm sounds, the generation of autorhythm sounds in the play mode, etc. are controlled by a microcomputer. Note that, in FIGS. 1 and 2, for example, a signal line hatched as in TD in FIG. 1 is a plurality of signal lines or represents a signal flow of a plurality of bits.

Structure of Electronic Musical Instrument (FIG. 1) In FIG. 1, a keyboard 12, a panel device 14, a central processing unit (CPU) 16, a program and a data R are connected to a data bus 10.
OM (Read Only Memory) 18, Data and Working RAM (Random Access Memory) 20, Tempo Timer 22, Roll Timer 24, Truncate Timer 26, Keyboard Tone Generator (TG) 28, Rhythm Tone Generator (TG) ) 30 etc. are connected.

The keyboard 12 has a large number of keys, and key pressing information is detected for each key.

The panel device 14 is provided with various operators for musical tone control or performance control and various display elements, and operation information is detected for each operator.

In the panel device 14, as an operator related to the implementation of the present invention, a pad operator PD for hand percussion is used.
S, rhythm selection operator RSS, role specification operator RLS
And a program mode designating operator PMS, a start / stop operator SPS, and a tempo adjusting operator TMN.

As the pad operator PDS, for example, 32 self-restoration type pad switches respectively corresponding to 32 kinds of rhythm sounds such as bass drum, snare drum, cymbal, etc. are provided.

As the rhythm selection operator RSS, for example, first to first corresponding to N (arbitrary plural) kinds of factory-set rhythm patterns such as march, waltz, rumba ...
An Nth rhythm selection switch and an Mth rhythm selection switch for selecting a rhythm pattern programmed by the performer are provided. A display element LD including a light emitting diode is provided for each rhythm selection operator, and when the rhythm selection operator is turned on to select a desired rhythm, the corresponding display element LD is turned on. ing.

The roll designating operator RLS is composed of, for example, a self-reset type switch, and by simultaneously turning on a desired pad operator (for example, one corresponding to a snare drum), a rhythm sound corresponding to the pad operator is produced. It is possible to specify the roll (continuous hit) sound.

The program mode designating operator PMS is composed of, for example, a self-reset type switch, and it is possible to designate the program mode and the play mode alternately for each operation. In addition, in the vicinity of the operator PMS, a display element P consisting of a light emitting diode
An LD is provided, and this display element PLD is lit when the program mode is designated.

The start / stop operator SPS is composed of, for example, a self-reset type switch, and can alternately instruct start and stop each time it is operated.

The tempo adjusting operator TMN is composed of, for example, a rotary knob and is used for setting a desired tempo.
A tempo display element TLD composed of four light emitting diodes arranged in a line is provided near the manipulator TMN, and sequentially lights at a speed corresponding to the set tempo in the program mode and the play mode. By doing so, the tempo is displayed.

The CPU 16 executes various processes according to the program stored in the ROM 18, and details of these processes will be described later with reference to FIGS. 6 to 17.

The ROM 18 stores data relating to the rhythm pattern of the factory set as well as various processing programs, and the stored contents will be described later with reference to FIG.

The RAM 20 has a storage unit for storing data relating to the rhythm pattern programmed by the performer, and in addition to this, includes a storage unit used as a working register or the like for various processes by the CPU 16. RAM20
The stored contents of will be described later with reference to FIG.

The tempo timer 22 generates a tempo clock signal TCL having a frequency according to the tempo data TD, and each clock pulse of this signal TCL is used to start the tempo clock interrupt processing of FIG.

The roll timer 24 generates a roll clock signal RCL, and each clock pulse of this signal RCL is used to start the roll timer interrupt process of FIG. The clock generation cycle of the roll timer 24 is, for example, several tens.
Although it is set to [ms], it may be variably set according to the player's operation or an external signal.

The truncate timer 26 is a clock signal for truncation.
KCL is generated, and each clock pulse of this signal KCL is used to start the truncate timer interrupt processing of FIG. The clock generation cycle of the truncate timer 26 is set to several tens [ms] as an example.

In this embodiment, the three timers 22, 24 and 26 are provided independently of each other, but the output of one timer can be appropriately divided to obtain the required clock signal.

The keyboard TG 28 is for generating a tone signal KTS corresponding to the pressed key based on the key pressing information detected from the keyboard 12.

The rhythm TG 30 generates a rhythm sound signal RTS based on the operation of the pad operator PDS and / or the selected rhythm pattern, which will be described later in detail with reference to FIG.

The sound system 32 has a musical sound signal KTS and a rhythm sound signal R.
It is for converting TS into sound.

Structure of Rhythm TG30 (Fig. 2) Fig. 2 shows an example of the structure of the TG30 for rhythm. In this example, by driving eight rhythm sound source channels in a time-divisional manner, the maximum can be obtained. Eight kinds of rhythm sounds can be pronounced simultaneously.

Of the registers 40, 42, 44, 46 connected to the data bus 10, 40 stores the channel number (CH number), 42 stores the instrument code ICODE indicating the rhythm tone type, and 44 represents As shown with respect to the envelope waveform data EV, the volume value VLM corresponding to the attack level of the envelope is stored, and 46 is the key-on information KON for instructing the start of rhythm sound generation. Information transfer to these registers 40, 42, 44, 46 is carried out simultaneously at the timing of sound generation for each rhythm sound type.

The write control circuit 48 is included in the ICODE storage circuit 50.
Instrument code IC from register 42 to the channel corresponding to the CH number from register 40 among the two time division channels
The write control is performed so that the ODEs are assigned, and the storage circuit 50 cyclically stores the assigned instrument chords and sends them at the timing of the channel related to the assignment.

The write control circuit 52 outputs the volume value VL from the register 44 to the channel corresponding to the CH number from the register 40 among the eight time division channels included in the VLM storage circuit 54.
Write control is performed so that M is assigned.
The number 4 cyclically stores the assigned volume value and sends it at the timing of the channel related to the assignment.

The write control circuit 56 outputs the key-on information KO from the register 46 to the channel corresponding to the CH number from the register 40 among the eight time division channels included in the KON storage circuit 58.
Write control is performed so as to allocate N, and the memory circuit 5
8 cyclically stores the assigned key-on information, and at the timing of the channel related to the assignment, the key-on pulse KO
It is designed to be sent as NP.

The address generator 60 is capable of time-divisionally generating address information for eight channels, and when receiving the key-on pulse KONP, generates address information at the timing of the channel assigned to KONP.

The rhythm sound waveform memory 62 stores, for example, rhythm sound waveforms (from the start of rising to the end of attenuation) collected from an actual percussion instrument by the PCM (pulse code modulation) recording method. Is stored for each of the 32 types of rhythm sounds that can be specified by the pad operator PDS.

From the waveform memory 62, the rhythm sound waveform corresponding to the musical instrument code assigned to each channel is read according to the address information from the address generator 60. For example, if a bass drum is assigned to the first channel, the bass drum sound waveform is read at the timing of the first channel.

The envelope generator 64 generates the envelope waveform data EV for the rhythm sound corresponding to the musical instrument chord associated with each channel in response to the key-on pulse KONP, and the attack level in the envelope indicated by the envelope waveform data EV is Volume value from storage circuit 54
Determined according to VLM.

The rhythm sound waveform data WD from the waveform memory 62 and the envelope waveform data EV from the envelope generator 64 are multipliers.
It is supplied to 66 and is multiplied for each channel. And
The multiplication output MO (digital tone signal) of the multiplier 66 is supplied to the sound system 32 after being converted into an analog rhythm tone signal RTS via an accumulator, a D / A converter, etc. as already known. To be done.

According to the rhythm TG30 described above, rhythm sound signals for eight channels can be simultaneously generated, and various kinds of rhythm sound signals corresponding to the waveforms stored in the waveform memory 62 can be specified by designating the rhythm sound type by the instrument code ICODE for each channel. The rhythm sound signal of can be generated.

Storage Content of ROM 18 (FIG. 3) FIG. 3 shows the storage content of the ROM 18. The ROM 18 has a storage section used as a rhythm pattern memory as shown in (A) and a storage section used in (B). A storage unit used as a truncate value memory as shown, a storage unit used as a volume value memory as shown in (C), and a storage unit (not shown) for storing other tone color parameters, effect parameters, etc. are included. Has been.

In the rhythm pattern memory of (A), storage blocks RPMEM (1) to RPMEM storing rhythm patterns respectively corresponding to N types of rhythms (rhythm 1 to rhythm N).
(N) and track number storage areas PTNNUM (1) to PTNN storing the number of storage tracks of these storage blocks, respectively.
UM (N) is provided.

The memory block RPMEM (1) corresponding to rhythm 1 has 16
Individual storage tracks are provided, and an instrument code storage area PICODE, a roll designation information storage area PRLFLG, and a timing information storage area are provided for each storage track. The arrangement of such storage tracks and storage areas is the same for the other rhythms 2 to N, but the number of storage tracks is the number required for each rhythm. For example, for rhythm 1, the number of tracks is 16 (PTNNUM (1)
= 16), and for rhythm 2, the number of tracks is 9 (PT
NNUM (2) = 9), and for the rhythm N, the number of tracks is 3 (PTNNUM (N) = 3).

Each instrument chord storage area PICODE stores an instrument chord representing a rhythm sound type, and each roll designation information storage area PR
In the LFLG, roll designation information 1 or 0 indicating whether or not there is a roll designation is stored. In this case, even the same rhythm sound type is treated as different rhythm sound types with and without roll designation. For example, separate storage tracks are given for a simple snare drum and a snare drum roll, and the instrument code of PICODE is the same for the snare drum in these storage tracks, but the roll designation information of PRLFLG is not for a simple snare drum. 0, and 1 for snare drum rolls.

Each timing information storage area has a tempo counter TPCTR.
64 storage cells PTN corresponding to the count values 0 to 63 (timing generation timing) of each are provided, and 1 is stored in the storage cells corresponding to the timing when the pronunciation is required, and storage cells corresponding to the timing when the pronunciation is not required. 0 is stored in each. The tempo counter TPCTR belongs to the RAM 20, as will be described later, and repeatedly counts the tempo clock signal TCL every two bars. Therefore, the stored information in each timing information storage area represents a sound emission control pattern for two measures.

FIG. 4 shows the timing data for one bar regarding the bass drum, snare drum, and snare drum roll as an example, and the same timing data as shown in the figure is stored for the following one bar.

In FIG. 4, there are eight soundable timings (for example, a TPCTR value of 0 to 7) within one beat, and one (1) at each soundable timing for the bass drum, snare drum, and snare drum roll. Information of whether pronunciation is required or 0 (no pronunciation is required) is arranged. An arrow extending from 1 or 0 to the right indicates that the same information continues.

According to the timing data of FIG. 4, the bass drum starts to sound at the first beat and the third beat, and the snare drum starts at the second beat and the fourth beat. To be done.
Further, the snare drum roll is instructed to roll sound over the period from the beginning of the first beat to the end of the second beat, and during the period corresponding to this period, the roll sound is generated by the roll timer interrupt processing of FIG. .

For rhythm 1 to rhythm N, rhythm code 1 to
N is defined and the rhythm code register R in RAM20
A rhythm code corresponding to the selected rhythm (for example, march) is set in CODE. A track number is set in the track number register TRN in the RAM 20 as described later. Therefore, by using RCODE and TRN, it is possible to read out and specify a specific storage track relating to a specific rhythm.

For example, as shown for rhythm 1 in FIG.
If RCODE = 1 and TRN = 10, rhythm 1 memory track
It is possible to read out the information in the storage areas PICODE and PRLFLG by designating 10, and by using the TPCTR, it is possible to designate the storage cell PTN and read out the tone generation control information (1 or 0) for one tone generation timing. .

By the way, in the truncate value memory of FIG. 3 (R), truncate values are stored respectively corresponding to 32 kinds of rhythm sounds (instrument 1 to instrument 32) which can be designated by the pad operator PDS. Each truncate value is determined in consideration of the pronunciation period (especially the decay time) of the corresponding rhythm sound type,
In this example, the longer the pronunciation period, the larger the value.
In FIG. 3 (B), "Musical instrument 1" is a bass drum, "Musical instrument 2" is a snare drum, and "Musical instrument 32" is a conga. In this example, the truncate value is not distinguished between the normal sound and the roll sound, but it may be stored separately.

In the volume value memory of FIG. 3 (C), musical instruments 1 to 32 are used in the same manner as the above-mentioned truncated value memory.
The volume value VLM is stored corresponding to each of the. In this case, different volume values are stored for the normal sound and the roll sound for each rhythm sound type, and the volume value of the roll sound is about half the value of the normal sound. This is because, for example, when the snare drum and the snare drum roll are sounded at the same time, as shown in FIG. 4, when the sound is played at the same volume, the snare drum sound is masked by the snare drum roll sound, and it becomes messy. , Because it is not musically preferable.

Storage Content of RAM 20 (FIG. 5) FIG. 5 shows the storage content of the RAM 20. In the RAM 20, as shown in (A), a storage section used as a rhythm pattern program memory and (B). A storage unit used as a memory for channel allocation as shown in FIG.
As shown in FIG. 3, a storage unit used as a working memory and a storage unit (not shown) for other panel operators, sound allocation, etc. are included.

In the rhythm pattern program memory of (A),
A storage block RPMEM (M) for storing a rhythm pattern corresponding to the rhythm code M and a track number storage area PTNNUM (M) for storing the number of storage tracks used in this storage block are provided. There is.

The storage block RPMEM (M) is provided with 16 storage tracks, and an instrument chord storage area PICODE, a roll designation information storage area PRLFLG, and a timing information storage area are provided for each storage track. . The data format in these storage areas is the same as that described above with respect to the rhythm pattern memory in FIG. 3 (A).

32 pad controls PD in program mode
When any one of S is operated, first, a musical instrument code representing a rhythm sound type corresponding to the operated pad operator is written in the storage area PICODE of the track 1. At this time, if the roll specification operators RLS are simultaneously operated, 1 is written in the storage area PRLFLG of track 1 and the operators
If the RLS was not operated, 0 will be written in PRLFLG. In the timing information storage area of track 1, 1 is written in the storage cell PTN corresponding to the value of TPCTR at this time.

Next, when another pad operator is operated, the storage area PICOD of track 2 is recorded in the same manner as described above for track 1.
Instrument chords, roll designation information, and timing information are written in the E, PRLFLG, and timing information storage areas, respectively.

Next, when the same pad operator that was operated first is operated, the instrument code, roll designation information, and timing information are respectively stored in the storage areas PICODE, PRLFLG and timing information storage area of track 1 in the same manner as described above for track 1. Is written.

In this way, pattern writing is performed so that a new track is assigned each time a new pad operator other than the assigned one is operated, and a rhythm pattern is completed with, for example, eight types of rhythm sounds. If so, the rhythm pattern is stored in the tracks 1 to 8 and the value of the storage area PTNNUM (M) finally becomes 8.

In the program mode and the play mode, for example, as shown for the track 8, the storage areas PICODE and PRLFLG can be specified by using RCODE and TRN.
The memory cell PTN can be specified by using R.

By the way, in the memory for channel allocation shown in FIG. 5B, eight instrument code registers ICODE (1) to ICODE (8) and eight truncation counters TCTR (1) are associated with the channels CH1 to CH8, respectively. ) ~ TCTR (8) and 8
One roll flag RLFLG (1) to RLFLG (8) and eight volume value registers VLM (1) to VLM (8) are provided.

Each instrument code register stores an instrument code for the corresponding channel. Each truncate counter has a corresponding channel in FIG. 3 (B).
The truncate value read from the truncate value memory is stored, and the stored truncate value is decremented (down-counted) by 1 by the truncate timer interrupt processing of FIG. Each roll flag stores roll designation information regarding the corresponding channel. Each volume value register stores the volume value VLM read from the volume value memory of FIG. 3 (C) for the corresponding channel.

The working memory shown in FIG. 5C has the following registers.

(1) Rhythm code register RCODE ... This is the rhythm code (1 to 1 corresponding to the operated rhythm selection operator RSS.
Either N or M) is stored.

(2) Pad code register PDCODE ... This stores the instrument code (any one of 1 to 32) representing the rhythm sound type corresponding to the operated pad operator PDS.

(3) Tempo counter TPCTR ... This counts the tempo clock signal TCL repeatedly every two measures, takes a count value of 0 to 63 within two measures, and is reset to 0 at the timing of 64. .

(4) Program mode flag PRGFLG ... This indicates a program mode if 1 and a play mode if 0.

(5) Start flag START This indicates a rhythm running when 1 and a rhythm stop when 0.

(6) Roll designation information register RLSW ... This is set to 1 when the roll designation operator RLS is in operation, and to 0 when it is not in operation.

(7) Track number register TRN ... This is for storing the track number (any one of 1 to 16).

(8) Assigned channel number register ACH ... This stores the channel number corresponding to the channel to which the instrument code is to be assigned.

(9) Channel number register CHN ... This stores the channel number (any one of 1 to 8).

(10) Tempo count value register DTPCTR ... This is the tempo count value (TP
The value obtained by subtracting 1 from the CTR value) is set.

Rhythm performance related panel operation (FIG. 1) Here, prior to explaining various processes after FIG. 6,
The outline of panel operation related to rhythm performance is described.

To program a rhythm pattern, select the program mode by operating the program mode specification operator PMS (display element PLD lit). Then, one of the rhythm selection operators RSS corresponding to the rhythm code M is turned on to enable writing to the storage block RPMEM (M). Further, if desired, the tempo is set by the tempo adjustment operator TMN. After this, start / stop operator SP
When the start command is issued by S, the display element TLD lights up according to the set tempo, so one of the pad operators PDS is operated several times according to the display tempo, and a specific rhythm sound type (for example, bass drum) Enter timing information about in real time. At this time, a rhythm sound (manual rhythm sound) related to the input is generated each time the input operation is performed.

When such input is completed, input operation is similarly performed for other rhythm sound types (for example, snare drum). At this time, the auto rhythm sound is generated based on the timing information that has been previously input, and the manual rhythm sound being input is also generated. In the same manner, the rhythm pattern corresponding to the rhythm code M can be completed by performing the input operation for the required number of rhythm sound types, and when the input is completed, the stop command is issued by the start / stop operator SPS.

On the other hand, if you want to perform an automatic rhythm performance based on a desired rhythm pattern, program mode designating element PM
The play mode is selected by S (display element PLD off).
Then, one of the rhythm selection operators RSS corresponding to a desired rhythm (one of rhythm codes 1 to N and M) is turned on. In addition, if desired, tempo adjustment operator TMN
After setting the tempo with, start / stop operator
Command start by SPS. Then, the display element TLD is turned on according to the set tempo, and the autorhythm sound is generated according to the selected rhythm pattern.

While such an autorhythm sound is being generated, a manual performance can be performed on the keyboard 12 as an accompaniment, while a manual rhythm sound can be generated by operating the pad operator PDS as desired.

Main Routine (FIG. 6) FIG. 6 shows the flow of processing of the main routine.
This routine starts when the power is turned on.

First, in step 70, various registers are initially set. For example, 0 is set to START, PRGFLG, TPCTR, etc.

Next, at step 72, key depression detection / sound generation assignment processing is performed. This is the TG28 for the keyboard that detects key depression information from the keyboard 12.
The musical tone signal KTS corresponding to the depressed key is generated by allocating the channel to the appropriate channel, thereby enabling the generation of the manual performance sound in response to the key depression operation. After step 72, the process moves to step 74.

In step 74, a rhythm selection subroutine is executed as described later with reference to FIG. Then, the routine proceeds to step 76, where a mode selection subroutine is executed as described later with reference to FIG. After this, move to step 78, the ninth
A start / stop subroutine is executed as described later with reference to the drawing. After step 78, the process proceeds to step 80.

In step 80, tempo control processing is performed. That is,
The frequency of the tempo clock signal TCL is set according to the tempo data TD by transmitting the tempo data TD corresponding to the tempo set by the tempo adjustment operator TMN to the tempo timer 22. Then, the process proceeds to step 82.

In step 82, a pad operation subroutine is executed as described later with reference to FIG. Then, the process proceeds to step 84.

In step 84, other panel controls (for example, timbre,
Processing related to effects etc.). After that, the process returns to step 72 and the above-mentioned processing is repeated.

Rhythm Selection Subroutine (FIG. 7) FIG. 7 shows a rhythm selection subroutine.

When an on event occurs in any of the rhythm selection operators RSS, in step 90, the rhythm code corresponding to the operated rhythm selection operator is set in RCODE. Then, the process proceeds to step 92.

In step 92, the display element LD corresponding to the operated rhythm selection operator is turned on and the other display elements LD are turned off. After that, the process returns to the routine of FIG. Note that “RET” shown in FIG. 7 and subsequent figures means return.

Mode Selection Subroutine (FIG. 8) FIG. 8 shows a mode selection subroutine.

When an on event occurs in the program mode designating operator PMS, in step 100, the contents of PRGFLG are inverted. That is, if the value of PRGFLG was 0, set it to 1,
If it was 1, set it to 0. Then, the process proceeds to step 102.

In step 102, it is determined whether the value of PRGFLG is 1 (program mode). And this judgment result is affirmative (Y)
If so, the process proceeds to step 104.

In step 104, the contents of the storage block RPMEM (M) are all cleared and the storage area PTNNUM (M) is also cleared. Then, the process proceeds to step 106 to clear all the contents of the channel allocation memory of FIG. 5 (B). Thereafter, in step 108, the rhythm code M is set in RCODE. These processes are for enabling writing of a new rhythm pattern. After step 108,
Move to step 110.

In step 110, the display element RLD is turned on to display that it is in the program mode. After that, the process returns to the routine of FIG.

If the determination result in step 102 is negative (N), the mode is the play mode, and the display element PLD is turned off in step 112, and then the process returns to the routine in FIG.

Start / Stop Subroutine (FIG. 9) FIG. 9 shows a start / stop subroutine.

When an on event occurs in the start / stop operator SPS, the contents of START are inverted in step 120.
That is, when the value of START is 0, it is set to 1, and when it is 0, it is set to 1. Then, the process proceeds to step 122.

In step 122, it is determined whether the START value is 1 (start). Then, if this determination result is affirmative (Y), the routine proceeds to step 124, where TPCTR is set to 0. This is to allow the rhythm pattern to be read from the beginning of the first measure at the start of the rhythm.

When the processing of step 124 is completed or when the determination result of step 122 is negative (N) (when it is stop), the routine returns to the routine of FIG.

Pad Operation Subroutine (FIG. 10) FIG. 10 shows a pad operation subroutine.

When an on event occurs in any of the pad operators PDS, it is determined in step 130 whether the value of PRGFLG is 1 (program mode). This judgment result is negative (N)
If so, it is the play mode, and the process returns to the routine of FIG. If the determination result of step 130 is affirmative (Y), the program mode is set, and step 13
Move on to 2.

In step 132, the instrument code indicating the rhythm sound type corresponding to the operated pad operator is set in PDCODE. Then, the process proceeds to step 134.

In step 134, it is determined whether the role designation operator RLS is on, and if this determination result is affirmative (Y), step 136
RLSW is set to 1, and if negative (N), step
At 138, RLSW is set to 0. Step 136 or step
After 138, the process proceeds to step 140.

In step 140, TRN is set to 0. Then, the process proceeds to step 142 and the value of TRN is incremented by 1. Step 142
After that, the process proceeds to step 144.

At step 144, the storage area PICODE (M, M specified by the rhythm code M of RCODE and the track number of TRN is specified.
(TRN) is equal to the PDCODE instrument chord, and the roll designation information of the storage area PRLFLG (M, TRN) designated by the rhythm code M and the TRN track number is equal to the roll designation information of the RLSW (this time. It is determined whether the rhythm sound type specified by the operation of is already assigned to the tracks corresponding to M and TRN. For example, when you first operate the desired pad operator after specifying the program mode,
Since the value of PICODE (M, 1) is 0, the determination result of step 144 is negative (N), and the process proceeds to step 146.

In step 146, it is determined whether the value of TRN is larger than the value of the storage area PTNNUM (M) designated by the rhythm code M (the number of used tracks up to the present). At the time of the first pad operation, the value of PTNNUM (M) is 0 in step 104 of FIG.
And TRN = 1, the determination result of step 146 becomes affirmative (Y), and the process proceeds to step 148.

In step 148, the TRN value is the maximum number of tracks available
Determine if it is greater than 16. If the result of this determination is affirmative (Y), it means that writing is not possible, and the routine returns to FIG.

If the determination result of step 148 is negative (N), it means that the data is writable, and the process proceeds to step 150.

In this step 150, the instrument code of PDCODE is changed to PICODE.
(M, TRN) with PRLFLG (M, T)
Write the channel number of TRN to PTNNUM (M). Then, the process proceeds to step 152.

In step 152, 1 is written in the memory cell PTN (M, TRN, TPCTR) designated by the channel number of the rhythm code M, TRN and the count value of TPCTR. In addition, TPCTR
As described later with reference to FIG. 13, the counting operation is performed not only during the play mode but also during the program mode.

By the way, if the second pad operation is performed after operating the first pad operator as in the above example, if the operated pad operator is the same as the first one, the determination in step 144 is made. The result is positive (Y), and the process moves to step 152. Then, in step 152, timing information is written in the same TRN = 1 track as in the previous time in the same manner as in the previous time.

In this case, assuming that a pad operator different from the first one is operated, or the same pad operator and roll designation operator as the first one are operated at the same time, step 144
Is negative (N), the process proceeds to step 146.

In step 146, TRN = 1 and PTNNUM (M) = 1, so the determination result is negative (N), and the process returns to step 142. Then, in step 142, set TRN to 2 and then step
Move on to 144.

At step 144, the storage area PICODE (M,
Since the information of 2) and PRLFLG (M, 2) are both 0 (unallocated), the determination result is negative (N), and the process proceeds to step 146.

In step 146, since TRN = 2 and PTNNUM (M) = 1, the determination result is affirmative (Y), and the process proceeds to step 150 via step 148.

In step 150, the musical instrument chord and roll designation information are written in the same TRN = 2 track as in the previous time, and 2 is written in PTNNUM (M) in the same manner as the previous time. After that, in step 152, timing information is written in the TRN = 2 track in the same manner as the previous time.

As yet another example, PTNNUM can be obtained by several pad operations.
If (M) is 5, the tenth operation is performed in response to a new pad operation.
When the routine shown in the figure is entered and step 146 is reached, TRN =
Since 1 and PTNNUM (M) = 5, the determination result of step 146 becomes negative (N), and the process returns to step 142. Then, the processes after step 142 are performed in the same manner as described above.

In this way, if there is no assigned track even after checking TRN = 5, the judgment result of step 144 becomes negative (N) after TRN becomes 6 in step 142. this is,
No instrument chord is assigned to track 6 (PI
CODE (M, 6) = 0).

After that, in step 146, TRN = 6, PTNNUM (M) = 5
Therefore, the determination result is affirmative (Y), and the step
Go to step 150 via 148. And step 150
Then, at step 152, the writing process for TRN = 6 is performed in the same manner as described above.

In the process of sequentially checking TRN = 2, 3, 4, and 5 as described above, if it is found that the rhythm sound type related to the pad operation this time has already been assigned to any track,
At that time, the routine proceeds from step 144 to step 152, and the timing information write processing is performed for the TRN track number at this time. For example, if the track with TRN = 4 is found to be the assigned track, step at that time.
The routine proceeds from 144 to step 152, where timing information is written for TRN = 4. In this case, TRN
= 5 is not checked.

According to the processing of steps 132 to 152 described above, each time the rhythm sound type is designated, it is determined whether the rhythm sound type is assigned to any track, and if there is an assigned track, the rhythm sound is assigned to that track. While the timing information related to the tone type is written, if there is no assigned track, the rhythm tone type is assigned to one of the unassigned tracks and the timing information associated with the rhythm tone type is written. Then, by repeating such processing, it becomes possible to write a desired rhythm pattern to the rhythm pattern program memory of FIG. 5 (A).

After step 152, the routine proceeds to step 154, where a sub-channel (CH) detection subroutine is executed as described later with reference to FIG. In this subroutine, the channel to which the instrument chord should be assigned is detected, and the channel number corresponding to that channel is set to ACH. Then, the process proceeds to step 156.

In step 156, the instrument code of PICODE (M, TRN) is set in the register ICODE (ACH) corresponding to the channel number of ACH, and PRLFLG (M, TRN) is set in the flag RLFLG (ACH) corresponding to the channel number of ACH. Set the role specification information of. As a result, the specified rhythm sound type is assigned to the channel detected in step 154. When RLFLG (ACH) is set to 1, the roll sound is automatically generated by the roll timer interrupt processing shown in FIG. After step 156, step 1
Go to 58.

In step 158, the truncate value corresponding to the instrument code of ICODE (ACH) is read from the truncate value memory of FIG. 3B and set in the counter TCTR (ACH) corresponding to the channel number of ACH. The TCTR (ACH) truncate value is subsequently decremented by 1 by the truncate timer interrupt processing of FIG.

Next, at step 160, the volume value VLM corresponding to the instrument code of ICODE (ACH) and the roll designation information of RLFLG (ACH) is read from the volume value memory of FIG. 3 (C) and corresponds to the channel number of ACH. Register VLM (AC
H).

After this, in step 162, the register 40,
For 42,44,46, the channel number of ACH, ICODE (AC
H) instrument code, VLM (ACH) volume value, and key-on information KON. For this reason, TG3 for rhythm
With 0, a rhythm sound signal corresponding to the rhythm sound type indicated by the ICODE (ACH) instrument code is generated from the channel corresponding to the ACH channel number at the attack level corresponding to the VLM (ACH) volume value. . After step 162, the routine returns to the routine shown in FIG.

According to the processing of steps 154 to 162 described above, a rhythm sound corresponding to the rhythm sound type is generated by assigning the rhythm sound type to an appropriate channel each time the rhythm sound type is designated. Manual rhythm performance is possible. Therefore, the performer can program a desired rhythm pattern while listening to the manual rhythm sound played by the performer.

Assigned channel detection subroutine (FIG. 11) FIG. 11 shows an assigned channel detection subroutine.

In step 170, it is determined whether the rhythm sound type relating to the allocation request has been allocated to any of channel 1 (CH1) to channel 8 (CH8). That is, the storage area P specified by the rhythm code of RCODE and the track number of TRN
Register ICODE corresponding to instrument code of ICODE (RCODE, TRN) and channel number X (one of 1 to 8)
Storage area P that matches the musical instrument chord of (X) and is specified by the rhythm code of RCODE and the track number of TRN
It is determined whether or not there is a channel X for which the roll designation information of RLFLG (RCODE, TRN) and the roll designation information of the flag RLFLG (X) corresponding to the channel number X match. If the determination result is negative (N), the process proceeds to step 172, and if the determination result is affirmative (Y), the process proceeds to step 174.

In step 172, if there is a TCTR (1) to TCTR (8) with a value of 0 (the one whose sound generation has ended), the channel number (CH number) corresponding to that value of 0 is put in the ACH. If there is no value 0, TCTR (1) to TCTR
The one with the smallest value among (8) (the one with the most advanced attenuation)
Put the CH number corresponding to in ACH.

At step 174, the CH number X of the already assigned channel is put into ACH. After step 172 or 174, the process returns to the original routine (FIG. 10 or FIG. 13).

According to the routine shown in FIG. 11 described above, when a request for assigning a new rhythm tone type other than the assigned one is made in a state where all 8 channels are occupied, this rhythm tone type is TCTR (1). By assigning to the channel corresponding to the smallest value among TCTR (8) to TCTR (8), the rhythm sound type is generated instead of the most attenuated rhythm sound type.

When the routine of FIG. 11 is used in the routine of FIG. 10, since the rhythm code of RCODE is M, step 170
Then, PICODE (M, TRN) instrument chords and PRLFLG
The determination is made based on the role designation information of (M, TRN).

Pad sound generation processing during play mode (Fig. 12) In the routine shown in Fig. 10, nothing was done when it was determined to be the play mode in step 130, but it is possible to generate rhythm sounds based on pad operation during the play mode. Well, one example is shown in FIG.

When it is determined in step 130 in FIG. 10 that the mode is the play mode, the process proceeds to step 180 in FIG.

In step 180, the instrument code representing the rhythm sound type corresponding to the operated pad operator PDS is PDCODE.
Set to. Then, the process proceeds to step 182.

In step 182, RLSW is set to 0. As described above, in this example, since the roll designation information is forcibly set to 0, no automatic roll sound is generated, but as described above with reference to FIG. 10, the operation of the roll designation operator RLS is detected and automatically performed. You may make it perform a roll sound.

Next, in step 184, the specified rhythm sound type is CH1.
~ Determine whether it has been assigned to any of CH8. This determination is performed in the same manner as step 170 in FIG. 11 except that PDCODE and RLSW are used instead of PICODE (RCODE, TRN) and PRLFLG (RCODE, TRN).

If the determination result of step 184 is negative (N), the process proceeds to step 186, similarly to step 172 of FIG.
Among the TCTRs (1) to (8), the CH number corresponding to the one with a value of 0 or the one with a minimum value is entered in ACH.

If the determination result of step 184 is affirmative (Y), the process proceeds to step 188, and the CH number X of the already assigned channel is put into ACH.

After step 186 or 188, move to step 190
The instrument code of PDCODE and the role designation information (0) of RLSW are written in (ACH) and RLFLG (ACH), respectively. And
Go to step 192.

In step 192, the truncate value corresponding to ICODE (ACH) is read from the truncate value memory and stored in TCTR (ACH) in the same manner as step 158 in FIG. Then, go to step 194.

In step 194, the volume value corresponding to ICODE (ACH) and RLFLG (ACH) is read from the volume value memory and placed in VLM (ACH) in the same manner as step 160 in FIG.
Then, the process proceeds to step 196.

In step 196, AC is performed in the same manner as step 162 in FIG.
By sending the key-on information KON together with the contents of H, ICODE (ACH) and VLM (ACH) to the TG30 for rhythm, the rhythm sound signal corresponding to ICODE (ACH) is VLM from the channel corresponding to ACH.
(ACH) Generate at an attack level compatible with. After that, the process returns to the routine of FIG.

Tempo clock interrupt process (Fig. 13) Fig. 13 shows the flow of the tempo clock interrupt process. This interrupt process is started at each clock pulse of the tempo clock signal TCL.

In step 200, it is determined whether the START value is 1 (rhythm running). If the result of this determination is negative (N), it means that the rhythm has stopped, and the routine returns to the routine of FIG.

When the determination result of step 200 is affirmative (Y), the process proceeds to step 202 and TRN is set to 1. As described above, the processes from step 202 onward are executed in both the program mode and the play mode as long as START = 1. After step 202, step 204
Move on to.

In step 204, the information of the memory cell PTN (RCODE, TRN, TPCTR) specified by the RCODE rhythm code (selected rhythm), the TRN track number, and the TPCTR count value is 1 (whether it is the timing at which the sound is generated). )judge. If the determination result is affirmative (Y), the process proceeds to step 206.

In step 206, the assigned channel detection subroutine is executed as described above with reference to FIG. That is,
The channel to which the rhythm sound type to be pronounced should be assigned is detected, and the CH number of that channel is placed in ACH. Then, the process proceeds to step 208.

In step 208, the storage area PRLFLG (RCODE, TRN) designated by the rhythm code of RCODE and the track number of TRN
Information is 1 (whether a role is designated) is determined. If the determination result is affirmative (Y), the process proceeds to step 210.

In step 210, a value obtained by subtracting 1 from the value of TPCTR (previous tempo count value) is put into DTPCTR. In this case, when the subtracted value becomes "-1", "63" is entered in DTPCTR. After step 210, the process moves to step 212.

In step 212, it is determined whether the information in the memory cell PTN (RCODE, TRN, DTPCTR) corresponding to the previous tempo count value is 1 (whether it is the timing at which sound should be generated). If this determination result is negative (N), it means that the timing data of the selected rhythm has changed from "0" to "1" as shown in FIG.

When the process of step 212 is completed or when the determination result of step 208 is negative (N) (when it is a normal sound without the roll designation), the process proceeds to step 214. In this step 214, ICODE (ACH) and RLFLG (ACH) are assigned a PICODE (RCODE, TRN) instrument number and PRLFLG (RCOD) respectively.
E, TRN) role specification information is set. Step 212
When you come to step 214 via, enter 1 in RLFLG (ACH)
Is set.

Next, at step 216, the truncate value corresponding to ICODE (ACH) is read from the truncate value memory and put into TCTR (ACH) in the same manner as at step 158 of FIG. Then, the process proceeds to step 218.

In step 218, the volume value corresponding to ICODE (ACH) and RLFLG (ACH) is read from the volume value memory and placed in VLM (ACH) in the same manner as step 160 in FIG.
Then, the process proceeds to step 220.

At step 220, AC is performed in the same manner as at step 162 of FIG.
By sending the key-on information KON together with the contents of H, ICODE (ACH) and VLM (ACH) to the TG30 for rhythm, the rhythm sound signal corresponding to ICODE (ACH) is VLM from the channel corresponding to ACH.
(ACH) Generate at an attack level compatible with.

When step 220 is reached via step 212, a key-on pulse KONP is generated in synchronization with the clock pulse of the tempo clock signal TCL when the timing data changes from "0" to "1" as shown in FIG. This pulse
The first note in the roll sound is generated according to KONP. Then, after that, sequential sounds in the roll sound are generated by the roll timer interrupt processing of FIG. 16 independently of the tempo clock signal TCL. The generation cycle T of these sequential sounds corresponds to the generation cycle of the roll clock signal RCL and is, for example, several tens [ms].

When the process of step 220 is completed or when the determination result of step 212 is affirmative (Y), the process proceeds to step 232. When the determination result of step 212 is affirmative (Y), the process proceeds to step 232 because "1" continues in the timing data as shown in FIG. This is because it is not necessary to perform the sounding process of ~ 220.

By the way, when the result of the determination in step 204 is negative (N) (when it is not the timing to pronounce),
Move to step 222. In this step 222, step 20
Similar to step 8, it is determined whether the PRLFLG (RCODE, TRN) information is 1. If the result of this determination is negative (N), it is not necessary to perform the roll sound generation stop processing described below, so the routine moves to step 232.

If the determination result in step 232 is affirmative (Y), the process proceeds to step 224, and DTPC is performed in the same manner as in step 210.
Set the previous tempo count value in TR. Then, the process proceeds to step 226.

In step 226, the PTN (RCOD
Judge whether the value of E, TRN, DTPCTR) is 1. If this determination result is negative (N), it means that “0” is consecutive in the timing data, and the routine proceeds to step 232.

If the determination result of step 226 is affirmative (Y), it means that the timing data has changed from "1" to "0" as shown in FIG. 14, and the process proceeds to step 228.

In step 228, the channel to which the roll sound is assigned is detected in the same manner as in step 170 of FIG. 11, and its CH number is put into ACH. Then, the process proceeds to step 230.

At step 230, RLFLG (ACH) is set to zero. As a result, the roll sound generation is stopped after the clock pulse of the tempo clock signal TCL when the timing data changes from "1" to "0" as shown in FIG.
After step 230, the process moves to step 232.

At step 232, the value of TRN is incremented by 1. Then, the process proceeds to step 234, and the storage area PTNNUM (RCODE) whose TRN value corresponds to the rhythm code (selected rhythm) of RCODE
Is greater than the number of tracks in. If this determination result is negative (N), the process returns to step 204 and TRN> PTNNUM (RCOD
The above process is repeated until E) is reached. For example,
In the rhythm pattern memory of FIG. 3 (A), when rhythm 1 is selected, PTNNUM (1) = 16.
The above process is performed 16 times.

When TRN> PTNNUM (RCODE), the determination result of step 234 becomes affirmative (Y), and the routine proceeds to step 236. In this step 236, the tempo display element TL is calculated based on the value of TPCTR.
Drive D. That is, the display elements TLD1 to TLD4 (from the leftmost one to the rightmost one in the TLD of FIG. 1) are shown in FIG. 15 depending on which of TPCTR values corresponds to 0, 8, 16 ... 48, 56. The lighting is controlled as shown. As a result, it is possible to display the tempo according to the set tempo. After step 236, the process moves to step 238.

In step 238, the value of TPCTR is incremented by 1. And
Go to step 240, whether TPCTR value is 64 (end of 2 bars)
If the result of this determination is negative (N), the routine returns to the routine of FIG.

When the result of the determination in step 240 is affirmative (Y), TPCTR is set to 0 in step 242, and then the process returns to the routine of FIG. Therefore, the automatic rhythm performance can be continued by repeatedly using the rhythm pattern for two measures.

Roll Timer Interrupt Processing (FIG. 16) FIG. 16 shows the roll timer interrupt processing. This interrupt processing is started at each clock pulse of the roll clock signal RCL.

In step 250, it is determined whether the value of START is 1, and if this determination result is negative (N), the routine returns to the routine of FIG.

When the determination result of step 250 is affirmative (Y), the process proceeds to step 252, and CHN is set to 1. As described above, the processing from step 252 is executed in both the program mode and the play mode as long as START = 1. After step 252, step 254
Move on to.

In step 254, it is determined whether the value of the flag RLFLG (CHN) corresponding to the channel number of CHN is 1 (whether a roll is designated). If this determination result is affirmative (Y), step 25.
Go to 6.

In step 256, the CHN channel number with roll designation and the instrument code of the CHN corresponding register ICODE (CHN) and C
The volume value of the register VLM (CHN) corresponding to HN and the key-on information KON are set for the rhythm in the same manner as in step 162 of FIG.
By sending to TG30, ICO from CHN compatible channel
A DE (CHN) compatible rhythm sound signal is generated at a VLM (CHN) compatible attack level (about half the level of normal sounds).

When the process of step 256 is completed or when the determination result of step 254 is negative (N) (when there is no role designation), the process proceeds to step 258.

At step 258, the value of CHN is incremented by 1. Then, the process proceeds to step 260, and it is determined whether the value of CHN is larger than the number of channels 8. If this determination result is negative (N), step
Returning to 254, the above processing is repeated until CHN> 8. In this way, the presence or absence of roll designation is checked for each channel, and if there is roll designation, a rhythm sound is generated.

When CHN> 8, the determination result of step 260 becomes affirmative (Y), and the process returns to the routine of FIG.

According to the roll timer interrupt process described above, since the roll sound is generated according to the roll clock signal RCL that is independent of the tempo clock signal TCL, the roll sound generation time interval does not change even if the tempo is changed. Moreover, the roll sound generation time interval can be arbitrarily set regardless of the tempo.

Truncate timer interrupt process (Fig. 17) Fig. 17 shows the truncate timer interrupt process.
This interrupt processing is started for each clock pulse of the truncation clock signal KCL.

In step 270, it is determined whether the value of START is 1, and if the determination result is negative (N), the routine returns to the routine of FIG.

When the determination result of step 270 is affirmative (Y), the process proceeds to step 272, and CHN is set to 1. As described above, the processes from step 272 onward are executed in both the program mode and the play mode as long as START = 1. After step 272, step 274
Move on to.

In step 274, it is determined whether the value of the counter TCTR (CHN) corresponding to the channel number of CHN is 0 (whether the sound generation is completed). If this determination result is negative (N), step 276.
, And subtract the value of 1 from the value of TCTR (CHN) to TCTR (C
HN).

When the process of step 276 is completed or when the determination result of step 274 is affirmative (Y) (when the sound generation ends), the process proceeds to step 278.

At step 278, the value of CHN is incremented by 1. Then, the process proceeds to step 280, and it is determined whether the value of CHN is larger than the number of channels 8. If this determination result is negative (N), step
Returning to 254, the above processing is repeated until CHN> 8. In this way, TCTR (CHN) = 0 for each channel
Check if it is not 0, and decrease the value of TCTR (CHN) by 1.

When CHN> 8, the determination result of step 280 becomes affirmative (Y), and the process returns to the routine of FIG.

The method of truncation is not limited to the one described above, and for example, (a) decrements by 1 at each tempo clock interrupt (however, the time until reaching 0 depends on the tempo), (b)
Decrement by 1 each time there is a new pronunciation assignment, (c) Set a smaller truncation value for longer decay times, add 1 at each interruption, and add a new rhythm sound type to the channel with the maximum addition result. There are methods such as allocation.

Modifications The present invention is not limited to the above embodiments, but can be implemented in various modified forms. For example, the following changes are possible.

(1) Although the example of controlling by software has been shown, the processing may be performed by dedicated hardware.

(2) For the rhythm tone generator, the example of the PCM waveform memory system is shown, but the sound source system is not limited to this, and an FM sound source system or the like can be used as appropriate. Further, the sound source configuration may be parallel to a plurality of channels instead of the time division processing of a plurality of channels.

(3) Although an example of an electronic musical instrument with a keyboard is shown, a dedicated rhythm playing device may be used.

(4) Although the example of the rhythm playing device is shown, the present invention is also applicable to an electronic musical instrument of a system in which a key depression sound is assigned to a channel together with a tone color code.

(5) There are various truncation methods other than those described above.

[Effects of the Invention] As described above, according to the present invention, a new musical tone type is assigned to a channel having the shortest remaining time of sounding even if all channels are being sounded. It is possible to prevent the situation where no sound is produced even if the musical tone type is specified, and it is possible to enjoy a variety of musical performances even with a small number of channels.

Further, since the truncate control information is read out for each musical tone type and a constant value is subtracted from the value indicated by the truncate control information regardless of the musical tone type, the processing becomes simpler than the subtraction of the variable value. There are also advantages.

[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 block diagram showing a configuration of a rhythm tone generator 30, and FIG. 3 is a diagram showing contents stored in a ROM 18. 4, FIG. 4 is a diagram showing an example of timing data, FIG. 5 is a diagram showing contents stored in the RAM 20, FIG. 6 is a flow chart showing a main routine, and FIG. 7 is a flow chart showing a rhythm selection subroutine. , FIG. 8 is a flow chart showing a mode selection subroutine, FIG. 9 is a flow chart showing a start / stop subroutine, FIG. 10 is a flow chart showing a pad operation subroutine, and FIG. FIG. 12 is a flowchart showing a subroutine, FIG. 12 is a flowchart showing a pad sounding process in the play mode, and FIG. 13 is a tempo clock. FIG. 14 is a signal waveform diagram for explaining the roll sounding operation, FIG. 15 is a diagram for explaining the tempo display operation, and FIG. 16 is a roll timer interrupt processing. FIG. 17 is a flowchart showing the truncate timer interrupt process. 10 ... Data bus, 14 ... Panel device, 16 ... Central processing unit, 18 ... Program and data ROM, 20 ... Data and working RAM, 22 ... Tempo timer, 24 ... Roll timer, 26 ... Truncate timer, 30 ... Tone generator for rhythm.

Claims (2)

[Claims] 1. A sound source means having a plurality of N tone forming channels, wherein a plurality of M are provided for each tone forming channel.
(M> N) musical tone types configured to generate a musical tone signal corresponding to a designated musical tone type, and (b) designating a musical tone type to be pronounced among the plurality of M musical tone types. Assigning means for generating tone type designation information, and (c) assigning the tone type designation information to any one of the plurality N of tone forming channels each time the tone type designation information is generated by the assigning means. Assigning means for designating a musical tone type in accordance with the musical tone type designating information in the musical tone forming channel; and (d) truncating the musical tone period for each musical tone type of the plurality N of musical tone types. Storage means for storing control information; and (e) truncation control information corresponding to a tone type specified for each tone forming channel assigned by the assigning means, by the storage means. From the value indicated by the truncate control information, and subtracting a constant value at predetermined time intervals from each other to measure the remaining tone generation time of the tone signal being generated. (F) control means for controlling the channel allocation of the allocating means based on the remaining sound generation time measured by the measuring means, wherein the designating means is assigned to the tone forming channel having the shortest remaining sound generation time. An electronic musical instrument that controls the channel assignment so that new musical tone type designation information from is assigned. 2. (a) A sound source means having a plurality of N percussion instrument sound forming channels, wherein a specified percussion instrument sound type is selected from among a plurality of M (M> N) percussion instrument sound types for each percussion instrument sound forming channel. A corresponding percussion instrument sound signal is generated, and (b) designation means for generating percussion instrument sound type designation information for designating a percussion instrument sound type to be pronounced among the plurality M of percussion instrument sound types, and (c) this designation means Each time the percussion instrument sound type designation information is generated from, the percussion instrument sound type designation information is assigned to any one of the plurality N of percussion instrument sound formation channels. Assigning means for designating a percussion instrument sound type in accordance with the above; (d) Truncate control information corresponding to the duration of the sounding period for each percussion instrument sound type among the plurality M of percussion instrument sound types (E) Truncation control information corresponding to the percussion instrument sound type designated for each percussion instrument sound forming channel assigned by the assigning means is read from the storage means, and is generated based on the truncation control information. Measuring means for measuring the remaining sounding time of the percussion instrument sound signal, and (f) control means for controlling the channel allocation of the allocating means based on the remaining sounding time measured by this measuring means. An electronic musical instrument that controls the channel assignment so that new percussion instrument type designation information from the designating means is assigned to the least percussion instrument sound forming channel.