JPH09330080A - Automatic musical performance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable various musical performance in an automatic musical performance device such as rhythm, code, base and the like. SOLUTION: The depth of reverb given to a musical sound signal is made the prescribed value such as the maximum value and the like in an effect giving device 24 during a reverb maximum switch RMX is pressed. During a star cut switch SCT is pressed, an utterance continuation time of a musical sound signal is made the prescribed value such as 1/2 and the like. During an one beat repeat switch RPT is pressed, musical performance of the prescribed section such as one beat and the like is repeated. When a tempo-up switch TUP is pressed, after tempo of musical performance is increased, musical performance is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic performance device for rhythms, chords, basses, etc., and in particular, it enables a variety of performances by changing the performance contents in accordance with the operation of various manual operators. is there.

[0002]

2. Description of the Related Art Conventionally, as an automatic performance device, storage means for storing performance data, reading means for reading performance data from this storage means, and musical tone signals are automatically generated according to the performance data read from the storage means. It is known to have a musical sound generating means for generating.

[0003]

In the above-described conventional automatic performance device, there are only a few parameters that can be adjusted by the user, such as tempo and volume (volume), so that the performance can be made interesting. could not. Also, because the parameter adjustment operation is not a one-touch type,
The operation could take time and effort.

An object of the present invention is to provide a novel automatic performance device capable of performing various performances by a simple operation.

[0005]

SUMMARY OF THE INVENTION According to the present invention, storage means for storing performance data for automatic performance, reading means for reading performance data from the storage means, and automatic performance according to the performance data read from the storage means are provided. In an automatic performance device provided with a musical tone generating means for generating a musical tone signal, any one of the following configurations (a) to (d) is adopted. (A) An operator, an effect imparting means for imparting an effect to the tone signal, and an effect in response to an operation of the operator, so that the effect imparted to the tone signal is set to a predetermined value only during the operation. A configuration provided with control means for controlling the application means. (B) A structure provided with an operating element and a control means for controlling the musical tone generating means so as to set the sounding duration of the musical tone signal to a predetermined value in response to the operation of the operating element. (C) A structure provided with an operator and a control means for controlling the reading means so as to repeatedly read the performance data in a predetermined performance section only during the operation in response to the operation of the operator. (D) A structure provided with an operator and a control means for controlling the reading means to stop the performance after raising the performance tempo in response to the operation of the operator.

According to the configuration of the present invention, when the configuration of (a) is adopted, it is possible to bring the effect such as reverberation to a predetermined maximum value while operating the operator.

Further, in the case of adopting the configuration of (b), the sounding duration (tone length) of the musical tone signal is generated while the operator is being operated.
Can be shortened to 1/2 or the like to perform a staccato performance.

Further, in the case of adopting the configuration of (C), it is possible to repeatedly perform a predetermined performance section such as one beat while operating the operator.

Further, in the case of adopting the configuration of (d), when the operating element is operated, the performance tempo rises and then the performance automatically stops.

[0010]

FIG. 1 shows a circuit configuration of an automatic accompaniment apparatus according to an embodiment of the present invention. In this apparatus, generation of accompaniment sounds of rhythm, chord and bass is controlled by a microcomputer. It is like this. Note that, in FIG. 1, the signal lines with diagonal lines are multi-bit signal lines.

The bus 10 includes a switch (SW) group 12,
CPU (central processing unit) 14, program memory 16,
A working memory 18, a data memory 20, a TG (tone generator) 22, an effect imparting device 24, etc. are connected.

The switch group 12 includes various switches provided on the panel surface, and operation information is detected for each switch. The following switches (1) to (14) are relevant to the implementation of the present invention.

(1) Start / stop switch SSW
... This is a switch for instructing the start or stop of the automatic accompaniment.

(2) Style selection switch SYS ... This is a switch for selecting an arbitrary accompaniment style such as lock.

(3) Chord progression selection switch CSS ... This is a switch for selecting any chord progression. A plurality of selectable chord progressions are set for each accompaniment style.

(4) Volume switch VMS ... This is a switch for arbitrarily setting the volume (volume of the automatic accompaniment sound).

(5) Volume up / down switch VUD ... This is a switch for instructing a volume up / down change. While this switch is on, the volume automatically repeats increasing and decreasing according to the cosine wave.

(6) Tempo switch TMS ... This is a switch for arbitrarily setting the tempo of automatic accompaniment.

(7) Tempo up switch TUP This is a switch for instructing the tempo increase before accompaniment stop. When this switch is turned on, the automatic accompaniment automatically stops after the tempo rises.

(8) Tempo up / down switch TU
D ... This is a switch for instructing the up / down change of the tempo. While this switch is on
The tempo of automatic accompaniment automatically rises according to the cosine wave
Repeat the descent.

(9) Double tempo switch TDS ...
This is a switch for raising the tempo to twice the current value.

(10) Reverb switches RVS0 to RV
S4 ... These switches are the 0th to 0th of the effect imparting device 24.
It corresponds to each of the fourth reverb effect imparting channels, and the reverb depth in the channel corresponding to each switch can be arbitrarily set.

(11) Reverb max switch RMX
This is a switch for setting the depth of reverb for all the 0th to 4th reverb effect imparting channels to a predetermined maximum value. While this switch is on, the reverb effect applied to the automatic accompaniment sound is maximized.

(12) Pitch bend switch PBD ... This is a switch for instructing the pitch bend before the accompaniment stop. When this switch is turned on, the automatic accompaniment will
It automatically stops after the pitch (pitch) rises.

(13) One-beat repeat switch RPT ... This is a switch for instructing the repetition of accompaniment for one beat. While this switch is on, one beat of accompaniment is repeated.

(14) Staccato switch SCT ... This is a switch for instructing a staccato performance. While this switch is turned on, the tone length of the generated musical tone is set to 1/2 of the original length.

The CPU 14 executes various processes for accompaniment sound generation in accordance with a program stored in a program memory 16 composed of a ROM (Read Only Memory). For these processes, refer to FIGS. And will be described later.

The CPU 14 supplies the interrupt cycle data corresponding to the set tempo to the timer 26. Timer 26
Generates an interrupt command signal in the interrupt cycle designated by the supplied interrupt cycle data, and supplies it to the CPU 14. The interrupt period corresponds to a 96th note within one measure and can be changed according to the set tempo. The CPU 14 uses the timer 2
The interrupt routine of FIG.

The working memory 18 is composed of a RAM (Random Access Memory), and includes a storage area used as a register, a counter, etc. in various processes by the CPU 14. Registers related to the embodiment of the present invention will be described later.

The data memory 20 comprises a ROM and includes a rhythm pattern memory 20A, an accompaniment pattern memory 20B, a chord progression memory 20C, a tempo sequence memory 20D and a volume sequence memory 20E.

In the accompaniment pattern memory 20B, accompaniment pattern data representing accompaniment patterns for a plurality of measures of 0th, 1st, and 2nd parts related to chords and accompaniment pattern data representing an accompaniment pattern of a plurality of measures related to a bass. And are remembered. Further, the rhythm pattern memory 20A stores accompaniment pattern data representing accompaniment patterns (rhythm patterns) for a plurality of measures of the fourth part relating to rhythm.

The accompaniment pattern data of each of the 0th to 3rd parts includes timing data representing the generation timing of each musical tone to be generated, key code data representing the pitch, and gate time data representing the sounding duration. Contains. Further, the accompaniment pattern data of the fourth part includes timing data representing the generation timing for each percussion instrument sound to be generated and percussion instrument chord data representing the name of the percussion instrument.

The accompaniment pattern data of each of the 0th to 4th parts includes timing data indicating the reverb depth and reverb depth data indicating the reverb depth for each timing to set the reverb depth. There is.
Therefore, the reverb depth can be automatically set according to the reverb depth data at the timing indicated by the timing data.

The chord progression memory 20C stores a plurality of chord progression data for each accompaniment style. Each chord progression data represents chord progressions for a plurality of measures by arranging chord data in time series. Each chord data is composed of chord root data that represents the root note (for example, C) of the chord and chord type data that represents the chord type (for example, minor). Since the accompaniment pattern data of the 0th to 3rd parts stored in the accompaniment pattern memory 20B is created based on the C major, when a chord sound or a bass sound is generated based on a chord other than the C major, It is necessary to appropriately change the pitch designated by the key code in the accompaniment pattern data, and the pitch conversion processing described in step 234 of FIG. 7 is performed for this purpose.

The tempo sequence memory 20D stores tempo sequence data for each accompaniment style. Each tempo sequence data includes, for each timing at which the tempo should be set, timing data indicating the timing and tempo data indicating the tempo value. Therefore, the tempo of the automatic accompaniment can be automatically set according to the tempo data at the timing indicated by the timing data.

In the volume sequence memory 20E,
Volume sequence data is stored for each accompaniment style. Each volume sequence data includes, for each timing at which the volume is set, timing data indicating the timing and volume data indicating the volume value. Therefore, the volume of the automatic accompaniment can be automatically set according to the volume data at the timing indicated by the timing data.

The TG 22 has, as accompaniment channels, channels 0, 1, and 2 for generating chords, a third channel for generating bass sounds, and a fourth channel for generating rhythm sounds. The tone signals from the 4th to 4th channels are supplied to the 0th to 4th reverb effect imparting channels of the effect imparting device 24, respectively.

In the effect imparting device 24, the 0th, 1st,
2, 3, and 4 reverb effect channels are TG22
The reverb effect is added to the tone signals from the 0th, 1st, 2nd, 3rd, and 4th channels, and the reverb depth is variably set according to the reverb depth data in each reverb effect imparting channel. It has become. 0th
The tone signals from the four reverb effect imparting channels are mixed and supplied to the sound system 28 and converted into sound.

Among the registers of the working memory 18, those related to the implementation of the present invention are listed as (1) to (21) below.

(1) Style number register STYL ...
In this, the number of the accompaniment style selected by the style selection switch SYS is set.

(2) Code progress number register CPN ...
This sets the number of the chord progression selected by the chord progression selection switch CSS.

(3) Volume value register VLM, V ...
The volume value is set in the VLM. V
, The volume value is set from the register VLM.

(4) Tempo value registers TMP, TM ... T
MP is for setting a tempo value. The tempo value is set in TM from the register TMS.

(5) Interrupt cycle register IT ...
The interrupt cycle data is set.

(6) Channel number register CH ... This is a register in which any one of channel numbers 0 to 4 is set.

(7) Reverb depth register RV (0)-
RV (4), R (0) to R (4) ... RV (0) to RV
(4) is a register corresponding to each of the 0th to 4th reverb effect imparting channels of the effect imparting device 24,
In both cases, reverb depth data is set. In each reverb effect imparting channel, the reverb depth is set according to the reverb depth data supplied from the corresponding register of RV (0) to RV (4). On the other hand, R
(0) to R (4) are the registers RV (0) to RV (4).
This register is used to temporarily store the reverb depth data of the.

(8) Clock counter T ... This value is incremented by 1 each time the interrupt routine of FIG. 5 is executed, and is used for the calculation of the cosine wave in steps 182 and 188 of FIG.

(9) Timing counter TCNT ... This value is incremented by 1 each time the interrupt routine of FIG. 5 is executed. In the case of 4-beat, it takes a value of 0-95.
When it reaches 96, it is reset to 0. The counter TCNT is used for the reproduction timing determination in step 226 of FIG.

(10) Run flag RUN ... This is a 1-bit register, and 1 indicates that the automatic accompaniment is being performed, and 0 indicates that the automatic accompaniment is in a stopped state.

(11) Pitch bend flag PB ... This is a 1-bit register, and becomes 1 in response to a pitch bend instruction from the switch PBD.

(12) Tempo up flag TU ... This is a 1-bit register, which becomes 1 in response to an instruction to increase the tempo by the switch TUP.

(13) Pitch bend value register PD ... This is for setting the pitch bend value.

(14) Chord root register RT ...
The chord root note data read from the memory 20C is set.

(15) Chord type register TP ... This is where the chord type data read from the memory 20C is set.

(16) Key code register KC ... This is for setting the key code data read from the memory 20B.

(17) Gate time register GT (0)
~ GT (3) ... These correspond to the accompaniment pattern data of the 0th to 3rd parts, respectively, and are all stored in the memory 2
The gate time data read from 0B is set.

(18) Shortening gate time register GT2
(0) to GT2 (3) ... These correspond to the accompaniment pattern data of the 0th to 3rd parts, respectively.
A value (reduced gate time) obtained by halving the value of the gate time data of (0) to GT (3) is set.

(19) Key-off determination register D ... This is GT (0) -GT (3) or GT2 (0) -GT2.
It is used to determine the key-off (end of the tone generation duration) by checking whether the stored value becomes 0 or less for each register of (3).

(20) 0th to 4th address pointers ...
These pointers correspond to the accompaniment pattern data of the 0th to 4th parts, respectively, and indicate the read address for the accompaniment pattern data of the part corresponding to each pointer.

(21) Code address pointer, tempo address pointer, volume address pointer ... These pointers are memories 20C, 20D and 20 respectively.
The read address of E is designated.

FIG. 2 shows the flow of processing of the main routine, and this routine starts when the power is turned on. First, in step 30, initial setting processing is performed. By this processing, the registers described above are initialized.

Next, at step 32, a control SW (switch) subroutine is executed as described later with reference to FIG. Then, the process proceeds to step 34.

In step 34, it is determined whether the style selection switch SYS has an on event. If this determination result is affirmative (Y), the process proceeds to step 36 and the switch S
Register ST with the accompaniment style number selected by YS
Set to YL.

When the result of the determination at step 34 is negative (N) or when the processing at step 36 is completed, the routine proceeds to step 38, where it is determined whether or not there is an on event in the chord progression selection switch CSS. If the result of this determination is affirmative (Y), the routine proceeds to step 40, where the code progress number selected by the switch CSS is set in the register CPN.

When the determination result of step 38 is negative (N) or when the processing of step 40 is completed, the process proceeds to step 42, and it is determined whether or not there is an on event in the volume switch VMS. If this determination result is affirmative (Y), the routine proceeds to step 44, where the volume value set by the switch VMS is set in the register VLM. Then, in step 46, volume data representing the volume value of the register VLM is output to the TG 22. As a result, in the TG 22, the volume of the automatic accompaniment is set according to the supplied volume data.

When the determination result of step 42 is negative (N) or when the process of step 46 is completed, the process proceeds to step 48, and it is determined whether the tempo switch TMS has an on event. If the determination result is affirmative (Y), the process proceeds to step 50, and the tempo value set by the switch TMS is set in the register TMP. In this case, the tempo value is set as the number of quarter notes per minute (for example, 120). After this, the process proceeds to step 52.

In step 52, the tempo value of the register TMP is set to TMP, and the interrupt period is calculated according to the following equation (1).

[0068]

[Equation 1] Then, the interrupt cycle data corresponding to the obtained interrupt cycle is set in the register IT. After that, in step 54, the interrupt cycle data of the register IT is output to the timer 26. As a result, the timer 26 sets the interrupt cycle according to the supplied interrupt cycle data.

When the result of the determination at step 48 is negative (N) or when the processing at step 54 is completed, the routine proceeds to step 56, where reverb switches RVS0 to RVS are set.
It is determined whether there is an on event in any of 4 above. If the determination result is affirmative (Y), the process proceeds to step 58, and the number of the reverb effect imparting channel (selected channel) corresponding to the switch having the on event is set in the register CH. After this, the process proceeds to step 60.

At step 60, reverb depth data corresponding to the reverb depth set by the switch having the on event is set in the register RV (CH) corresponding to the channel number of the register CH. Then, the reverb depth data of the register RV (CH) is output to the reverb effect imparting channel corresponding to the channel number of the register CH in the effect imparting device 24. As a result, in the reverb effect imparting channel corresponding to the channel number of the register CH, the reverb depth is set according to the supplied reverb depth data.

When the result of the determination at step 56 is negative (N) or when the processing at step 62 is completed, the routine proceeds to step 64, where a start / stop subroutine is executed as will be described later with reference to FIG. Run. Then, the process proceeds to step 66.

At step 66, other processing is executed. Then, the process returns to step 32, and the subsequent processes are repeated as described above.

FIG. 3 shows a subroutine of the control SW. In step 70, it is judged whether the reverb max switch RMX has an on or off event. If the determination result is affirmative (Y), step 72
Then, it is judged whether it is an on event. If the determination result is affirmative (Y), the process proceeds to step 74.

In step 74, the data of the register RV (i) is transferred to the register R (i) with i = 0-4.
That is, the reverb depth data of the registers RV (0) to RV (4) are set in the registers R (0) to R (4), respectively. Then, the process proceeds to step 76, where RV (0)-
Reverb depth data representing a predetermined maximum reverb depth is set in each register of RV (4).

If the determination result in step 72 is negative (N), it means that the switch RMX is off event, and the process proceeds to step 78. In step 78,
The reverb depth data of the registers R (0) to R (4) are set in the registers RV (0) to RV (4), respectively.
As a result, the reverb depth can be returned from the maximum value to the original value.

When the processing of step 76 or 78 is completed, the routine proceeds to step 80, and registers RV (0) -RV
The reverb depth data of (4) is set to the 0th value of the effect applying device 24.
~ Output to each of the fourth reverb effect imparting channels. As a result, in each reverb effect imparting channel, the reverb depth is set according to the supplied reverb depth data. That is, the reverb depth is set to the maximum value from step 76 to step 80, and the reverb depth is set to the value immediately before reaching the maximum value from step 78 to step 80.

When the result of the determination at step 70 is negative (N) or when the processing at step 80 is completed, the routine proceeds to step 82, where it is determined whether there is an on event in the double tempo switch TDS. If this determination result is affirmative (Y), the process proceeds to step 84.

At step 84, the tempo value obtained by doubling the tempo value of the register TMP is set in the register TMP. Then, the process proceeds to step 86, and the interrupt period is calculated based on the tempo value of the register TMP according to the above-mentioned equation (1). Interrupt cycle data corresponding to the obtained interrupt cycle is set in the register IT. After that, the interrupt cycle data of the register IT is output to the timer 26. As a result, the timer 26 sets the interrupt cycle according to the supplied interrupt cycle data.

When the result of the determination at step 82 is negative (N) or when the processing at step 88 is completed, the routine proceeds to step 90, where it is determined whether the volume up / down switch VUD has an on event. If the result of this determination is affirmative (Y), the routine proceeds to step 92, where the register V
While setting the volume value of LM in the register V,
The counter T is set to 0. This is a preparation process for volume up / down.

When the determination result of step 90 is negative (N) or when the process of step 92 is finished, the process moves to step 94 and the tempo up / down switch TU.
It is determined whether D has an on event. If the result of this determination is affirmative (Y), the routine proceeds to step 96, where the register TMP
And the counter T is set to 0. This is a preparation process for tempo up / down.

When the result of the determination at step 94 is negative (N) or when the processing at step 96 is completed, the routine proceeds to step 98, where it is determined whether the pitch bend switch PBD has an on event. This determination result is positive (Y)
If so, the process proceeds to step 100, and 1 is set in the flag PB.

When the determination result of step 98 is negative (N) or when the processing of step 100 is completed,
In step 102, it is determined whether the tempo up / down switch TUD has an on event. If the determination result is affirmative (Y), the process proceeds to step 104 and the flag T
Set 1 to U.

The determination result of step 102 is negative (N).
If it is, or when the processing of step 104 is completed, the routine returns to the routine of FIG.

FIG. 4 shows a start / stop subroutine. In step 110, it is determined whether the start / stop switch SSW has an on event. If the result of this determination is negative (N), the processing described below is unnecessary, and the routine returns to the routine of FIG.

The determination result of step 110 is positive (Y).
If it is, the process proceeds to step 112 and the flag RUN is set.
If the value of is 1, it is inverted to 0, and if it is 0, it is inverted to 1. And
Moving to step 114, it is determined whether the flag RUN is 1.
If the determination result is affirmative (Y), the process proceeds to step 116.

In step 116, the counter TCNT is reset to 0. Then, the process proceeds to step 118, in which all of the 0th to 4th address pointers, code address pointers, tempo address pointers, and volume address pointers are set to the head address. After this,
Move to step 120, and set both flags PB and TU to 0.
Is set, and 0 is set in the register PD.

The determination result of step 114 is negative (N).
If so, automatic accompaniment stop processing is performed. That is, in step 122, the key-off signal is output to all the 0th to 4th channels of the TG 22 to start the attenuation of the musical tone signal being generated.

When the processing of step 120 or 122 is completed, the routine returns to the routine of FIG. When the routine of FIG. 2 is executed as described above, the timer 2
When the interrupt command signal is generated from 6, the interrupt routine of FIG. 5 is started.

In FIG. 5, in step 130, as shown in FIG.
The control subroutine is executed as described later with reference to. Then, the process proceeds to step 132.

In step 132, it is determined whether the flag RUN is 1. If the result of this determination is negative (N), the processing described below is unnecessary, and the routine returns to the routine of FIG. The determination result of step 132 is positive (Y)
If so, the process proceeds to step 134.

In step 134, the chord progression memory 2
At 0C, the chord progression data designated by the accompaniment style number of the register STYL and the chord progression number of the register CPN is selected, and the data designated by the chord address pointer is read from the chord progression data related to this selection. If the read data is chord data, the chord root data is stored in the register RT and the chord type data is stored in the register T.
Set to P respectively. If the read data is end data (data indicating the end of code progression), this end data is set in the register RT. After reading the data, the code address pointer is advanced to the address to be read next. After reading the end data, return to the start address.

Next, in step 136, the register RT
It is judged whether the data of is end data. If the determination result is affirmative (Y), the process returns to the routine of FIG. If the determination result of step 136 is negative (N), the process proceeds to step 138.

At step 138, the tempo sequence data designated by the accompaniment style number of the register STYL is selected in the tempo sequence memory 20D, and the data designated by the tempo address pointer is read out from the tempo sequence data related to this selection. After reading the data, the tempo address pointer is advanced to the address to be read next. After reading the end data (data indicating the end of the tempo sequence), it is returned to the start address.
After this, the process proceeds to step 140.

In step 140, it is determined whether the read data is not end data and the timing for reproduction has arrived. When the timing to be reproduced arrives, the timing indicated by the read timing data is counter TCNT.
It can be determined by checking whether it matches the value of. If the determination result of step 140 is affirmative (Y), step 1
Move to 42.

At step 142, it is judged whether the tempo up / down switch TUD or the tempo up switch TUP is pressed. If the determination result is negative (N), the process proceeds to step 144.

At step 144, the tempo data at the address next to the read timing data is read, and the tempo value designated by the tempo data is set in the register TMP. After reading the tempo data, the tempo address pointer advances to the address to be read next. And
Move to step 146.

At step 146, the interrupt cycle is obtained based on the tempo value of the register TMP according to the above-mentioned equation (1). Interrupt cycle data corresponding to the obtained interrupt cycle is set in the register IT. And step 1
At 48, the interrupt cycle data of the register IT is output to the timer 26. As a result, the timer 26 automatically sets the interrupt period based on the tempo data read from the memory 20D.

The determination result of step 140 is negative (N).
If the determination result in step 142 is affirmative (Y), or if the process in step 148 ends, the process proceeds to step 150. If the determination result of step 142 is affirmative (Y), the tempo up / down or tempo up process is performed in the routine of FIG. 6, so the tempo setting process of steps 144 to 148 is not performed.

In step 150, the volume sequence data specified by the accompaniment style number of the register STYL is selected in the volume sequence memory 20E, and the data designated by the volume address pointer is read out from the volume sequence data related to this selection. After reading the data, the volume address pointer is advanced to the address to be read next. After reading the end data (data indicating the end of the volume sequence), it is returned to the start address. After this, the process proceeds to step 152.

In step 152, it is determined whether the read data is not end data and the timing for reproduction has arrived. This determination can be performed in the same manner as described in step 140. If the determination result of step 152 is affirmative (Y), the process proceeds to step 154.

At step 154, volume up /
It is determined whether the down switch VUD is pressed.
If the determination result is negative (N), the process proceeds to step 156.

At step 156, the volume data at the address next to the read timing data is read out, and the tempo value indicated by this volume data is set in the register VL.
Set to M. After reading the volume data, the volume address pointer advances to the address to be read next. Then, the process proceeds to step 158.

At step 158, the volume data representing the volume value of the register VLM is output to the TG 22. As a result, in the TG 22, the volume of the automatic accompaniment is automatically set based on the volume data read from the memory 20E.

The determination result of step 152 is negative (N).
If the determination result in step 154 is affirmative (Y), or if the process in step 158 ends, the process proceeds to step 160. If the determination result in step 154 is affirmative (Y), the volume up / down process is performed in the routine of FIG. 6, so the volume setting process in steps 156 and 158 is not performed.

At step 160, an accompaniment reproduction subroutine is executed as described later with reference to FIG. Then, the routine proceeds to step 162, where a key-off subroutine is executed as described later with reference to FIG. After this, the process proceeds to step 164.

At step 164, the value of the counter TCNT is incremented by 1. When the value of the counter TCNT reaches 96, it is reset to 0. And step 1
Move to 66.

At step 166, it is determined whether the one-beat repeat switch RPT is pressed. If the result of this determination is affirmative (Y), the routine proceeds to step 168, where it is determined whether the value of the counter TCNT has reached a value corresponding to the beginning of the next beat. If the determination result is affirmative (Y), step 1
Moving to 70, the value of the counter TCNT is returned to the value corresponding to the beginning of the previous beat. As a result, it is possible to repeat the accompaniment for one beat (the feel of a record needle jumping).

When the determination result of step 166 or 168 is negative (N) or when the process of step 170 ends, the process moves to step 172 and the value of the counter T is incremented by 1. Then, the process returns to the routine of FIG. The interrupt processing as described above is repeated every time an interrupt command signal is generated from the timer 26.

FIG. 6 shows a control subroutine. In step 180, it is determined whether the volume up / down switch VUD is pressed. If the determination result is affirmative (Y), the process proceeds to step 182.

In step 182, the value of the register V and the value of the counter T are set to V and T, respectively, and the volume value is obtained according to the following equation (2).

[0111]

[Equation 2] Then, the obtained volume value is set in the register VLM. After this, the process proceeds to step 184, where the register VLM
The volume data indicating the volume value of is output to the TG 22. By performing the processing of steps 182 and 184 at each interruption, the TG 22 controls the volume of the automatic accompaniment to increase or decrease according to the cosine wave.

The determination result of step 180 is negative (N).
If it is, or if the processing of step 184 is completed, the routine proceeds to step 186, where it is determined whether the tempo up / down switch TUD is pressed. If this determination result is affirmative (Y), the process proceeds to step 188.

At step 188, the tempo value is obtained according to the following equation 3 using the values of the register TM and the counter T as TM and T, respectively.

[0114]

(Equation 3) Then, after setting the calculated tempo value in the register TMP, the process proceeds to step 190, and the interrupt cycle is calculated based on the tempo value of the register TMP according to the above-mentioned equation (1). Interrupt cycle data corresponding to the obtained interrupt cycle is set in the register IT. After this, step 192
Move on to.

At step 192, the interrupt cycle data of the register IT is output to the TG 22. By executing the processing of steps 188 to 192 each time an interrupt occurs, TG2
In 2, the tempo of the automatic accompaniment is controlled to rise and fall according to the cosine wave.

The determination result of step 186 is negative (N).
If it is, or if the process of step 192 ends, the process moves to step 194, and it is determined whether the flag PB is 1. If the determination result is affirmative (Y), step 19
Moving to 6, the value of the register PD is incremented by 1. Then, the process proceeds to step 198.

At step 198, it is determined whether the pitch bend value of the register PD is larger than a predetermined upper limit value K1. If this determination result is negative (N), the routine proceeds to step 200, where pitch bend data representing the pitch bend value of the register PD is output to all the 0th to 4th channels of the TG 22. Steps 196, 198, 200 for each interrupt
By performing the processing of (1), the pitch of the tone signal of the 0th to 4th channels rises corresponding to the increase of the value of the register PD.

After that, when the determination result of step 198 is affirmative (Y), the process proceeds to step 202, and key-off signals are output to all the 0th to 4th channels of the TG 22.
Then, in step 204, 0 is set in the flag RUN. As a result, the automatic accompaniment is stopped.

The determination result of step 194 is negative (N).
If it is, or if the processing of step 200 or 204 is completed, the routine proceeds to step 206, and it is determined whether the flag TU is 1. If this determination result is affirmative (Y), the routine proceeds to step 208, where a value obtained by subtracting 0.1 × 10 ⁻³ from the value of the interrupt period of the register IT is set in the register IT. Then, the process proceeds to step 210.

At step 210, it is determined whether the value of the register IT is smaller than a predetermined lower limit value K2. If this determination result is negative (N), the process proceeds to step 212 and the register I
The T interrupt cycle data is output to the timer 26. By performing the processing of steps 208, 210 and 212 at each interruption, the tempo of the automatic accompaniment rises corresponding to the decrease in the value of the register IT.

After that, when the determination result of step 210 becomes affirmative (Y), the routine proceeds to step 214, where key-off signals are output to all the 0th to 4th channels of the TG 22.
Then, in step 216, 0 is set in the flag RUN. As a result, the automatic accompaniment is stopped.

The determination result of step 206 is negative (N).
If it is, the process proceeds to step 212 and the register IT
The interrupt cycle data of is output to the timer 26. And
When the processing of step 212 or 216 is completed, FIG.
Return to the routine.

FIG. 7 shows an accompaniment reproduction subroutine. In step 220, rhythm reproduction processing is performed. That is, in the rhythm pattern memory 20A,
Select the accompaniment pattern data (rhythm pattern data) specified by the accompaniment style number of the register STYL,
Of the accompaniment pattern data, the data designated by the address pointer of the fourth part is read. If the read data is timing data, it is determined based on the timing data and the value of the counter TCNT whether it is the timing to reproduce. If the determination result is affirmative (Y), the percussion instrument code data related to the timing data. Alternatively, the reverb depth data is read from the memory 20A.

When the percussion instrument code data is read, the percussion instrument code data is output to the fourth channel of the TG 22 to generate the percussion instrument sound signal designated by the percussion instrument code data. When the reverb depth data is read, the reverb depth data is stored in the register RV.
After setting to (4), the reverb depth data of the register RV (4) is output to the fourth reverb effect imparting channel of the effect imparting device 24. As a result, in the fourth reverb effect imparting channel, the reverb depth is set according to the supplied reverb depth data.

After reading the data, the fourth address pointer is advanced to the address to be read next. When instructing end data (data indicating the end of the rhythm pattern), return to the start address.

Next, at step 222, the register CH
Is set to 0. Then, in step 224, accompaniment pattern data designated by the accompaniment style number of the register STYL and the number of the register CH is selected in the accompaniment pattern memory 20B, and the number of the register CH is selected from the accompaniment pattern data related to this selection. Reads the data indicated by the address pointer of the specified part. After reading the data, the address pointer is advanced to the address to be read next. When instructing end data, return to the start address. After this, the process proceeds to step 226.

At step 226, it is judged whether or not the timing should be reproduced based on the read timing data and the value of the counter TCNT. If this determination result is affirmative (Y), the process proceeds to step 228, and it is determined whether the data at the address next to the read timing data is key code data. If this determination result is affirmative (Y), step 23
Move to 0.

At step 230, the key code data is read out and set in the register KC. Then, in step 232, the gate time data at the address next to the key code data is read and set in the register GT (CH). The register GT (CH) is a gate time register designated by the number of the register CH. After this,
Move to step 232.

At step 232, the register GT (C
A value obtained by halving the value of (H) is set in the register GT2 (CH). The register GT2 (CH) is the register CH
It is a shortened gate time register specified by the number. After this, the process proceeds to step 234.

In step 234, registers RT and T
Pitch conversion processing is performed on the key code data of the register KC based on the P data. Then, the key code data subjected to the pitch conversion processing is set in the register KC. After this, the process proceeds to step 236.

At step 236, the key-on signal and the key code data (pitch data) of the register KC are input to the channel designated by the number of the register CH in the TG 22.
Is output. As a result, a tone signal having a pitch corresponding to the key code data is generated from the designated channel.

The judgment result of step 228 is negative (N).
If it is, it means that it is not the key code data but the reverb depth data, and the routine proceeds to step 238.
In step 238, the reverb depth data is stored in the register R.
Set to V (CH). The register RV (CH) is a reverb depth register designated by the number of the register CH. After this, the process proceeds to step 240.

At step 240, the register RV (C
The reverb depth data of H) is output to the reverb effect imparting channel designated by the number of the register CH in the effect imparting device 24. As a result, in the designated reverb effect imparting channel, the reverb depth is set according to the supplied reverb depth data.

The judgment result of step 226 is negative (N).
If it is, or when the processing of step 236 or 240 is completed, the process proceeds to step 242 and the register CH
Increase the value of by 1. Then, the process proceeds to step 244,
It is determined whether the value of the register CH is 4. When step 244 is first reached after step 222, the value of the register CH is 1, and the determination result of step 244 is negative (N).
Becomes In this case, the process returns to step 224, and the subsequent processes are repeated as described above.

When the value of the register CH is 0, 1, 2, and 3 and the above-mentioned processing is completed and the step 242 is reached, the value of the register CH becomes 4. Then, the determination result of step 244 is affirmative (Y), and the process returns to the routine of FIG.

FIG. 8 shows a key-off subroutine. In step 250, 0 is set in the register CH. Then, the process proceeds to step 252, and it is determined whether the staccato switch SCT is pressed. If the determination result is negative (N), the process proceeds to step 254.

At step 254, the register GT (C
The gate time data of H) is set in the register D.
If the determination result of step 252 is affirmative (Y), the process proceeds to step 256 and the register GT (C
The shortened gate time data of H) is set in the register D. When the processing of step 254 or 256 ends,
Move to step 258.

At step 258, the value of register D is 0.
It is judged whether it is the following (whether the pronunciation duration is over). If this determination result is negative (N), the process proceeds to step 260, and the value obtained by subtracting 1 from the value in the register GT (CH) is set in the register G.
T (CH) and register GT2 (C
The value obtained by subtracting 1 from the value of (H) is registered in the register GT2 (CH).
Set to.

When the processing of steps 258 and 260 is repeated for each interruption, the judgment result of step 258 becomes affirmative (Y), and the routine proceeds to step 262. At step 262, the key-off signal is output to the channel designated by the number of the register CH in the TG 22,
Attenuating the tone signal being generated is started.

When the process of step 260 or 262 is completed, the process proceeds to step 264 and the value of the register CH is set to 1
Up. Then, the process proceeds to step 266, and it is determined whether the value of the register CH is 4. When step 264 is first reached after step 250, the value of the register CH is 1, and the determination result of step 266 is negative (N).
In this case, the process returns to step 252 and the subsequent processes are repeated in the same manner as described above.

When the value of the register CH is 0, 1, 2, and 3 and the above processing is completed and the process goes to step 264, the value of the register CH becomes 4. Then, the determination result of step 266 becomes affirmative (Y), and the process returns to the routine of FIG.

According to the routines of FIGS. 7 and 8, the 0th to 4th
Automatic accompaniment based on the accompaniment pattern data of the part becomes possible.

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

(1) The reverb effect may be eliminated instead of being maximized. For this purpose, 0 may be set in the register RV (i) in step 76 of FIG. Further, the effect to be given may be another effect such as chorus.

(2) The tempo may be halved instead of doubled. To do this, in step 84 of FIG.
The TMP value × 1/2 may be set in MP.

(3) It is possible to repeat half beats instead of one beat. For this purpose, it is determined in step 168 of FIG. 5 whether the value of the counter TCNT has reached a value corresponding to the end of a half beat, and if this determination result is affirmative (Y), step 1
At 70, TCNT may be returned to the beginning of a half beat.

(4) Up / down changes in volume or tempo may be controlled according to a sawtooth wave or the like instead of the cosine wave.

(5) When the tempo up switch TUP is turned on, the tempo may be raised and then lowered before the performance is stopped.

(6) When the staccato switch SCT is turned on, the tone length may be set to 1/4 instead of 1/2. To do this, register G in step 232 of FIG.
The GT (CH) value × 1/4 may be set in T2 (CH).

(7) The present invention is applicable not only to automatic accompaniment of rhythm, chord, bass, etc., but also to automatic performance of melody, etc.

[0151]

As described above, according to the present invention, the effect imparting, the sounding duration, the partial repetition of the performance, the tempo before the performance is stopped, etc. are controlled according to the operation of the operator. The effect is that you can enjoy a variety of automatic performances.

Further, since the control operation by the operator can be performed by one-touch type, there is an advantage that the operability is high.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of an automatic accompaniment apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a main routine.

FIG. 3 is a flowchart showing a control SW subroutine.

FIG. 4 is a flowchart showing a start / stop subroutine.

FIG. 5 is a flowchart showing an interrupt routine.

FIG. 6 is a flowchart showing a control subroutine.

FIG. 7 is a flowchart showing an accompaniment reproduction subroutine.

FIG. 8 is a flowchart showing a key-off subroutine.

[Explanation of symbols]

10: bus, 12: switch group, 14: CPU (central processing unit), 16: program memory, 18: working memory, 20: data memory, 22: TG (tone generator), 24: effect imparting device, 26: timer Two
8: sound system, RMX: reverb max switch, SCT: staccato switch, RPT: 1 beat repeat switch, TUP: tempo up switch.

Claims (4)

[Claims] 1. A storage means for storing performance data for automatic performance, a reading means for reading the performance data from the storage means, and a musical tone for automatically generating a musical tone signal according to the performance data read from the storage means. An automatic performance device comprising: a generating unit, an operator, an effect imparting unit for imparting an effect to the musical tone signal, and a response to the musical tone signal to the musical tone signal in response to an operation of the operating unit. An automatic performance device comprising: control means for controlling the effect imparting means so that the effect imparting has a predetermined value. 2. A storage means for storing performance data for automatic performance, a reading means for reading the performance data from the storage means, and a musical tone for automatically generating a musical tone signal according to the performance data read from the storage means. An automatic performance device comprising a generating means, wherein the musical tone generating means is controlled in response to an operation of the operating element to set a sounding duration of the musical tone signal to a predetermined value only during the operation. An automatic performance device provided with a control means. 3. Storage means for storing performance data for automatic performance, reading means for reading performance data from this storage means, and musical tone for automatically generating a musical tone signal according to the performance data read from the storage means. An automatic performance device provided with a generating means, wherein the read means is controlled so as to repeatedly read the performance data in a predetermined performance section only during the operation of the operator in response to the operation of the operator. An automatic performance device provided with a control means. 4. Storage means for storing performance data for automatic performance, reading means for reading performance data from this storage means, and musical tone for automatically generating a musical tone signal according to the performance data read from the storage means. An automatic performance device provided with a generation means, and provided with an operator and a control means for controlling the reading means to stop the performance after raising the performance tempo in response to the operation of the operator. An automatic performance device characterized in that