JPH0934451A - Readout control device for outside supply data of electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly change readout of outside supply data stored in outside memory device and the like without causing increase of manufacturing cost by reading out outside supply data in prescribed relation to outside supply data selected by a selection means and storing the data in an inside memory means, to renew the memory content of the inside memory means. SOLUTION: Variation N is stored in BUF (1), and before and behind variations of the variation N, N-1, N+1, are respectively stored in BUF (0) and BUF (2) by arrangement. When the variation N+1 is selected, the variation N+1 strode in the BUF (2) becomes in performance, and the variation N+2 is loaded in the BUF (0). When loading of the variation N+2 in the BUF (0) is completed, the variation N+2 can be selected. Consequently, during an automatic performance, changeover of automatic accompaniment by patterns arranged before and behind of the variation can be instantaneously performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an externally-supplied data reading control device for an electronic musical instrument, and more specifically, it reads out externally-supplied data stored in an external storage device or the like of the electronic musical instrument for internal storage of the electronic musical instrument. The present invention relates to an externally-supplied data read control device for an electronic musical instrument, which is suitable for reading from an external storage device, such as an external storage medium such as a floppy disk, which takes a long time to access when reading the device.

[0002]

2. Description of the Related Art Generally, an automatic accompaniment apparatus of a type in which pattern data for automatic accompaniment is read from an external storage device such as a floppy disk or the like, which takes a long time to access, and is read into an internal storage device. Electronic musical instruments such as are known.

In such an electronic musical instrument, an internal storage device such as a semiconductor memory such as a built-in random access memory (RAM), which does not take much time to access from the external storage device, is used for actual performance such as automatic accompaniment. Previously, it was necessary to pre-read the pattern data for automatic accompaniment.

That is, since it takes a certain amount of time to read pattern data for automatic accompaniment from an external storage device that takes a long time to access, the pattern data for automatic accompaniment, etc., can be read as needed during performance. However, it was impossible to immediately read out the necessary pattern data, etc. Therefore, before the performance, it is necessary to change from an external storage device that takes time to access and cannot be read immediately to an internal storage device that can be read immediately without access to the semiconductor memory. I was trying to read the pattern data for automatic accompaniment.

[0005]

By the way, during the performance using the automatic accompaniment device of the type described above,
When attempting to switch the pattern of the automatic accompaniment, it takes time to read the pattern data of the pattern to be switched from the external storage device to the internal storage device, so the pattern of the automatic accompaniment cannot be switched immediately. There was a problem.

An external storage device such as a floppy disk storing pattern data for automatic accompaniment,
Normally, the pattern data of a plurality of automatic accompaniment patterns is stored, but in order to confirm each of the plurality of automatic accompaniment patterns stored in the external storage device in this way, the pattern data is stored in the external storage device. It is necessary to sequentially read the pattern data for automatic accompaniment that is being played one by one into the internal storage device and listen to it, which is complicated and inferior in operability and extremely time-consuming. There was a problem that

On the other hand, in order to solve the above-mentioned problems, all the pattern data and the like for automatic accompaniment stored in the external storage device may be read in advance in the internal storage device. As described above, if all the pattern data for automatic accompaniment is read into the internal storage device, it is possible to quickly switch to any automatic accompaniment pattern.

However, in order to read all the pattern data for automatic accompaniment stored in the external storage device into the internal storage device in advance, it is necessary to provide an internal storage device with an enormous storage amount, which results in a manufacturing cost. It has been pointed out that it will lead to new problems such as a sharp rise in.

The present invention has been made in view of the above-mentioned various problems of the prior art, and an object thereof is to external storage without causing a large increase in manufacturing cost. It makes it possible to quickly switch the reading of the externally supplied data stored in the device, for example, if the automatic accompaniment pattern is switched during a performance, the automatic accompaniment pattern is switched immediately. Another object of the present invention is to provide an externally-supplied data read-out control device for an electronic musical instrument, which is capable of performing the above.

[0010]

In order to achieve the above object, the externally-supplied data read control device for an electronic musical instrument according to the present invention is selected next to the externally-supplied data currently selected and being played. The externally supplied data to be obtained is read from the outside in advance and read into the internal storage means.

That is, the externally-supplied data read control device for an electronic musical instrument according to the present invention reads out externally-supplied data having a predetermined music information section supplied from the outside as one unit and temporarily stores it in the internal storage means. In the electronic musical instrument whose operation is controlled based on the externally supplied data stored in the storage means, it is possible to store a plurality of units of externally supplied data having a predetermined music information section supplied from the outside as one unit and the stored contents. An internal storage unit having an updatable storage area and a plurality of units of externally supplied data stored in the internal storage unit, the user selects an externally supplied data to be processed for operation control. According to the selection means, and the external supply data having a predetermined relationship with the external supply data selected by the selecting means are read out. Reading the part storage means, in which as a control means for updating the stored contents of the internal storage means.

[0012]

In the internal storage means, in addition to the external supply data which is currently the processing target for controlling the operation of the electronic musical instrument, the external supply data having a predetermined relationship with the external supply data is always stored. Thus, it becomes possible to quickly switch the reading of the external supply data and the external supply data having a predetermined relationship with the external supply data.

That is, even during the operation of the electronic musical instrument based on certain externally supplied data, the externally supplied data having a predetermined relationship with the externally supplied data can be immediately read out, so that the operation of the electronic musical instrument can be quickly switched. it can.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an externally supplied data read control device for an electronic musical instrument according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram of an automatic accompaniment apparatus including an externally-supplied data read control device for an electronic musical instrument according to an embodiment of the present invention.

The automatic accompaniment apparatus shown in FIG. 1 is configured to control the entire operation thereof by using a central processing unit (CPU) 10. The CPU 10 executes, via a bus (BUS) 12, a timer 14 that interrupts the CPU 10 at regular intervals according to the currently set tempo, and processes shown in various routines such as a main routine described later. A program memory 16 including a read only memory (ROM) in which a program for executing the program and a random access memory (RAM) and various register groups necessary for executing the program by the CPU 10 are set. R which stores the working area 18 and the pattern data for automatic accompaniment (hereinafter, simply referred to as "pattern data").
A pattern memory 20 made up of an OM, a floppy disk drive 24 for reading pattern data from a floppy disk 22 as an external storage device storing pattern data to the working area 18, and an embodiment of the present invention described later. A manipulator unit 26 including various related manipulators and a tone generator 2 for generating / stopping a musical tone signal for automatic accompaniment based on pattern data.
8 and an amplifier 30 for amplifying the musical tone signal generated by the tone generator 28 are connected to each other.

A speaker 32 is connected to the amplifier 30 so that the musical tone signal generated by the tone generator 28 and amplified by the amplifier 30 is emitted to the space as a audible musical tone. There is.

Further, the pattern data stored in the pattern memory 20 and the floppy disk 22 is described in a so-called event format, and the content of the event (note-on (sound) or note-off (silence)). And step time data indicating the elapsed time until the next event data is read out (hereinafter referred to as "step time") are configured as one set, and such one set of data is configured. Are sequentially stored in chronological order. Then, it is composed of the above event data and step time data 1
The data of the set is pointed by one pointer as described later.

The last pattern of one pattern
The data is marked as the end of the pattern data, and the step
The time data contains the pattern
The elapsed time until the data is read is stored.

Further, the pattern memory 20 stores, for each variation (pattern) described later, the start address of the storage area in which the pattern data corresponding to the variation is stored.

Similarly, on the floppy disk 22,
Information indicating a storage area in which pattern data corresponding to the variation is stored is stored for each variation.

FIG. 2 shows a schematic structure of an operation panel section provided with various operators forming the operation section 26.
As the various operators forming the operator section 26, the following ones are set.

(1) Start / stop button (st
(artSW) 40 If you press the start / stop button 40 when the automatic accompaniment has not started, the automatic accompaniment starts (starts playing).
Is indicated, and the star / top button 40 is displayed during automatic accompaniment.
Press to instruct to stop the automatic accompaniment (stop playing).

(2) Category selection button (category SW) A42a to category selection button H42h An operator for selecting a category of an automatic accompaniment pattern. The category of the pattern indicated by the pattern data stored in the memory 20 can be selected, and the pattern data stored in the floppy disk 22 as the category can be selected by the category selection button H42h.

That is, as shown in FIG. 3, the pattern memory 20 has patterns of categories designated by category numbers 0 to 6 corresponding to category selection buttons A42a to G42g, respectively. Data is stored (FIG. 3 is an example in which category number 0 indicates a reggae category, category number 1 indicates a march category ... Category number 6 indicates a jazz category. ). Therefore, by appropriately pressing the category selection button A42a to the category selection button G42g, the categories corresponding to the category number 0 (category: reggae) to the category number 6 (category: jazz) can be appropriately selected.

By pressing the category selection button H42h, it is possible to select the disc of the category designated by the category number 7, which is the category showing the pattern data stored in the floppy disc 22.

(3) Variation selection button 44 (variation + (plus) SW44a and variation- (minus) SW44b) The variation selection button 44 is variation + S
W44a and variation-SW44b, which are the pattern data actually played from the categories of category number 0 to category number 7 selected by the category selection buttons A42a to H42h. Is selected (see FIG. 3). That is, in the present embodiment, one unit of pattern data actually read to play one pattern of automatic accompaniment is called a variation.

Each time the variation + SW 44a is pressed, the variation number is incremented by 1 and the variation can be designated.
The variation number is 1 each time SW44b is pressed.
It is possible to select variations by gradually decreasing.

In the working area 18, a register for storing arrays and variables used for executing processing shown in various routines such as a main routine described later, a buffer for storing pattern data, etc. Are provided, but their explanation will be given together with the explanation of the routines using them for easy understanding.

The operation of the above-described automatic accompaniment apparatus will be described with reference to the flow charts shown in FIG. 4 and subsequent figures in the above-mentioned configuration.・ The routine (Fig. 4) is repeated at high speed, but timer 1
When there is an instruction to start various interrupt processing routines, which will be described later, such as an instruction to start the timer interrupt processing routine by an interrupt to the CPU 10 of No. 4, the execution of the processing of the main routine is suspended and the instruction is responded to. Executes the interrupt processing routine, and when execution of the interrupt processing routine ends, returns to the main routine and returns to the main
Routine processing is repeated.

Although there are many interrupt processing routines as will be described later, it is assumed that the execution of another interrupt processing routine is prohibited during execution of each interrupt processing routine.

First, the main routine will be described with reference to FIG. 4. As described above, the main routine is started after the initialization processing by turning on the power source, and thereafter the main routine is turned off. -The routine loops and repeats processing.

In the processing of this main routine, a variable sw indicating the switch (sw) number designating the operator and an array sw_fifo [] are set for the processing of each operator constituting the operator section 26. To use. The size of this array is 256.

Further, the above array sw_fifo []
Variable sw_rptr that manages the position to read out, and variable sw_wptr that manages the position to write in the above array
In the initialization process after power-on, both sw_rptr and sw_wptr are 0.
Is substituted and initialized.

In the loop of the main routine,
First, in step S402, sw_rptr and sw
_Wptr is compared to determine whether the two match.

If the determination result of step S402 is negative (N), that is, if sw_rptr and sw_wptr are different, the process proceeds to step S404 and sw_fif.
Then, sw is obtained from o [sw_rptr], and it is determined from this sw which operator has been pressed.

That is, when the process of step S404 is completed, the process first proceeds to step S406, it is determined whether or not sw is the start / stop button 40, and step S406 is executed.
If the determination result of 406 is affirmative (Y), that is, if sw is the start / stop button 40, step S4
In step 08, the start / stop processing sub-routine (FIG. 8) is executed.

On the other hand, if the determination result in step S406 is negative, that is, if sw is not the start / stop button 40, the process proceeds to step S410, and sw is category selection button A42a to category selection button H42.
If the determination result in step S410 is affirmative, that is, if sw is the category selection button A42a to the category selection button H42h, the process proceeds to step S412 and the category processing sub-routine (Fig. Execute 11).

On the other hand, if the decision result in the step S410 is negative, that is, if sw is not the category selection button A42a to the category selection button H42h, the process proceeds to a step S414, it is determined whether or not the sw is the variation + SW44a, and the step is performed. If the determination result in S414 is affirmative, that is, if sw is variation + SW44a, the process proceeds to step S416, and the variation + processing sub-routine (FIG. 12) is executed.

On the other hand, if the decision result in the step S414 is negative, that is, if sw is not the variation + SW44a, sw becomes the variation-SW44b, so the routine proceeds to the step S418, and the variation-processing sub-routine (FIG. 13) is executed. Run.

As described above, the start / stop processing sub-routine (FIG. 8), the category processing sub-routine (FIG. 11), and the variation + processing sub-routine (FIG. 8) corresponding to the pressed operator are displayed. 12) or when the execution of the variation-processing sub-routine (FIG. 13) is completed, the process proceeds to step S420, and sw_r
1 is added to ptr and the process proceeds to step S422.

In step S422, it is determined whether sw_rptr is 256. If the determination result is affirmative, that is, if sw_rptr is 256, the process proceeds to step S424, 0 is substituted into sw_rptr, and step S402 Return to.

On the other hand, if the determination result in step S422 is negative, that is, if sw_rptr is not 256, the process directly returns to step S402.

If the determination result of step S402 is affirmative, that is, if sw_rptr and sw_wptr match, the process of step S402 is repeated until sw_rptr and sw_wptr differ.

In other words, sw_rptr and sw_wp
The processes of steps S404 to S424 are repeatedly performed until tr matches and the determination result of step S402 is affirmative.

Next, referring to FIG. 5, the disc (Di
sk) The insertion interrupt processing routine will be described.
In this disc insertion interrupt processing routine, BUF [0], BUF [1] and BUF, which are buffers for storing the pattern data for automatic accompaniment stored in the floppy disc 22 for three variations
[2] is used.

Further, in the disc insertion interrupt processing routine, a pointer indicating which buffer among the above-mentioned BUF [0], BUF [1] and BUF [2] the variation currently playing is stored. Cur_buf as the floppy disk 22
The variation before the variation currently being played in the array of is the above-mentioned BUF [0], BUF
Prev_buf as a pointer indicating which buffer is stored in [1] and BUF [2]
Using, the variation after the one currently playing in the array of the floppy disk 22 is
BUF [0], BUF [1] and BUF described above
Next_buf is used as a pointer indicating which buffer in [2] is stored.

Further, in the disc insertion interrupt processing routine, a variable pattern_num indicating the number of variations in the pattern data for automatic accompaniment stored in the floppy disc 22 is used and a variable indicating a variation number designating the variation. variation [] (Since the category number of the pattern data stored in the floppy disk 22 is 7, the floppy disk 22
The variable that indicates the variation number that specifies the variation in the pattern data for automatic accompaniment stored in is represented by variation [7]. ) Is used.

Furthermore, when switching the variation to be actually played, the floppy disk 22 to B
The variables prev_ready, cur_ready and next_ready are used to prevent switching to the variation being read into UF [0], BUF [1] or BUF [2].

The above-mentioned buffers and registers for storing variables are cur_buf = -1 prev_buf = -1 next_buf = -1 pattern_num = -1 prev_ready = 0 cur_ready = 0 0 in the initialization processing after power-on. It is initialized to variation [] = 0.

Then, during execution of the main routine, the floppy disk 22 becomes a floppy disk.
When it is inserted into the drive 24, the CPU 10 is interrupted and the disk insertion interrupt process is activated.

In the disk insertion interrupt process, first, in step S502, pattern_num.
The number of variations of the pattern data for automatic accompaniment stored in the floppy disk 22 is substituted into.

When the process of step S502 is completed, the process proceeds to step S504, and the variation "7" is set to 0.
To initialize the variation number for designating the variation of the floppy disk 22.

When the processing in step S504 is completed, the flow advances to step S506 to load the first variation in the array of the floppy disk 22 into BUF [1].

Upon completion of the processing in step S506, the flow advances to step S508 to substitute 1 in cur_buf to indicate that the first variation in the array of the floppy disk 22 is stored in BUF [1], and cur_ready. Substitute 1 for
Indicates that the variation has been loaded into F [1].

When the processing in step S508 is completed, the flow advances to step S510 to load the second variation in the array of the floppy disk 22 into BUF [2].

When the process of step S510 is completed, the process proceeds to step S512, 2 is substituted into next_buf to indicate that the second variation in the array of the floppy disk 22 is stored in BUF [2], and Substitute 1 for next_ready,
Indicates that the variation has been loaded into BUF [2].

When the process of step S512 is completed, the process proceeds to step S514, and the last variation in the array of the floppy disk 22 is loaded into BUF [0].

Upon completion of the processing in step S514, the flow advances to step S516 to substitute 0 in prev_buf to indicate that the last variation in the array of the floppy disk 22 is stored in BUF [0] and prev_ready. Substitute 1 for
It indicates that the loading of the variation into UF [0] is complete and returns to the main routine.

When the floppy disk 22 is removed from the floppy disk drive 24 during the execution of the main routine, the CPU 10 is interrupted and an interrupt process (not shown) is started.

In this interrupt processing, prev_ready = 0 cur_ready = 0 next_ready = 0 to indicate that the pattern data cannot be read from any of the buffers.

Next, the timer interrupt processing routine will be described with reference to FIG. 6. In this timer interrupt processing routine, working is used as a graph showing whether or not the automatic accompaniment is being performed, and "working = "0" indicates that the accompaniment is not playing and [working = 1]
Indicates that the automatic accompaniment is playing. This working
Is set to 0 in the initialization process after the power is turned on.

The category selection button A42a to the category selection button H42h or the variation selection button 44 (variation + SW44a or variation-SW44b) is pressed and p is set as a flag indicating whether or not pattern data switching is instructed.
Although tn_cng is used and ptn_cng is set to 0 in the initialization process after the power is turned on, “1” is set when any one of these operators is pressed, and when the process related to the pressed operator is completed. Cleared to "0".

Then, during the execution of the main routine, the timer 14 interrupts the CPU 10 at regular intervals according to the currently set tempo, thereby starting the timer interrupt processing routine.

In the timer interrupt processing routine, first, in step S602, it is determined whether ptn_cng is 1.

Then, if the determination result of step S602 is affirmative, that is, if ptn_cng is 1, the process proceeds to step S604, and the sub routine of the automatic accompaniment pattern switching process (FIG. 14) is executed.

On the other hand, if the result of the determination in step S602 is negative, that is, if ptn_cng is 0, and if the automatic accompaniment pattern switching process in step S604 is a
When the execution of the routine is finished, step S606
Go to and determine whether working is 1.

If the result of the determination in step S606 is affirmative, that is, if working is 1, the process advances to step S608 to execute the sub routine (FIG. 15) of the automatic accompaniment data read process, and then to the main routine. To return.

On the other hand, if the determination result in step S606 is negative, that is, if working is 0, the process returns to the main routine without performing any processing.

Further, referring to FIG. 7, the switch (S
W) Explaining the interrupt processing routine, when any one of the operating elements 26 is pressed during execution of the main routine, the CPU 10 is interrupted,
This activates the switch interrupt processing routine.

In the switch interrupt processing routine, first, in step S702, the sw number of the pressed operator is written in sw_fifo [sw_wptr].

When the process of step S702 is completed, the process proceeds to step S704 and 1 is added to sw_wptr.

Upon completion of the processing in step S704, the flow advances to step S706 to determine whether sw_wptr is 256.

If the determination result of step S706 is affirmative, that is, if sw_wptr is 256, sw_wp
Substitute 0 for tr and return to the main routine.

On the other hand, if the decision result in the step S706 is negative, that is, if sw_wptr is not 256, the process directly returns to the main routine.

Next, the start / stop processing, the category processing, the variation + processing and the variation-processing shown as the sub routines of the main routine will be described in order.

First, the start / stop processing will be described with reference to FIG. 8. First, in step S802, it is determined whether 1 is set in working.

If the determination result in step S802 is negative, that is, if 0 is set in working, it means that the start / stop button 40 has been pressed in the stop state where automatic accompaniment is not performed. , Step S8 in order to start the performance of the automatic accompaniment
In step 04, the sub routine of the automatic accompaniment start process (FIG. 9) is executed, and then the process returns to the main routine to perform the process of step S420.

On the other hand, if the result of the determination in step S802 is affirmative, that is, if 1 is set in working, it means that the start / stop button 40 was pressed during the performance of the automatic accompaniment. In order to stop the accompaniment exercise, the process advances to step S806 to execute the sub routine of the automatic accompaniment stop process (FIG. 10),
Then, the process returns to the main routine and the process of step S420 is performed.

The sub-routine of the automatic accompaniment start processing in step S804 of the above-mentioned start / stop processing routine will be described below with reference to FIG. 9. In this automatic accompaniment start processing routine, pattern data is read. Read_ptr indicating a read address for reading, step_next managing a time interval for reading pattern data, and st
step_count, which is the sum of all ep_next
Is used.

The category specifying the category
The number is represented by a variable category, which is initialized to 0 when the power is turned on.

In the automatic accompaniment start processing routine, first, in step S902, step_
Substitute 0 for count and step_next, and vari in the category indicated by category.
The start address of the storage area in which the variation currently selected by the operation [category] is stored is read into read_ptr.

When the process of step S902 is completed, the process proceeds to step S904, 1 is assigned to working, and
Then return to the main routine.

The sub-routine of the automatic accompaniment stop processing in step S806 of the above-mentioned start / stop processing routine will be described with reference to FIG. 10. First, in step S1002, the mute processing is performed. That is, the tone generator 28 stops the generation of all the musical tone signals being generated, and mutes all the musical tones currently being generated.

When the processing of step S1002 is completed,
The process advances to step S1004, 0 is assigned to working, and then the process returns to the main routine.

Next, the category processing will be described with reference to FIG. 11. The maximum value of the variation of the current category (the category number indicating the category currently selected by the category selection button A42a to the category selection button H42h). Max_vari is used to store.

In this category processing, first in step S1102, whether or not the category corresponding to the category selection button A42a to the category selection button H42h that has been pressed is the disk which is the category of the pattern data of the floppy disk 22. To judge.

If the determination result of step S1102 is affirmative, that is, if the disc is selected as the category,
In step S1104, it is determined whether cur_ready is 1.

If the result of the determination in step S1104 is negative, that is, if cur_ready is 0, the pattern data is read from the disc while reading the pattern data of the disc or because the disc is not inserted. Since it indicates that the data cannot be read, the process directly returns to step S420 of the main routine.

That is, when the pattern data cannot be read from the disk, the category is floppy
Even if the operation of selecting the pattern data of the disk 22 is performed, it is ignored.

On the other hand, if the determination result of step S1104 is affirmative, that is, if cur_ready is 1, the process proceeds to step S1106. Also, when the determination result of step S1102 is negative, that is, when the category of the pattern data stored in the pattern memory 20 is selected as the category, the process proceeds to step S1106.

In step S1106, the category number corresponding to the pressed category selection button 42A to 42H is substituted into the category in response to the pressed category selection button 42A to 42H.

When the processing of step S1106 is completed,
Proceed to step S1108, and set max_vari to the current ca.
Substitute the maximum value of variation of the category. When the process of step S1108 ends, the process proceeds to step S1110, 1 is substituted into ptn_cng, and the process returns to step S420 of the main routine.

Further, referring to FIG.
Variation in step S416 of routine +
The processing will be described. In this variation + processing routine, a new variable tmp_buf indicating the buffer storing the pattern data for automatic accompaniment is used to switch the variation stored in the buffer.

In the variation + processing routine, first, in step S1202, the current category
ry is the pattern stored in the pattern memory 20.
Determine if it is a category of data.

If the determination result of step S1202 is affirmative, that is, if the current category is the category of the pattern data stored in the pattern memory 20,
The process advances to step S1204, where variation [ca
[tegory] is smaller than max_vari−1. That is, it is determined whether or not the variation number before the variation is changed by the variation currently being processed + the variation that has activated the processing routine + SW44a is smaller than the maximum value of the variation (variation [category].
y] starts from 0, so the value obtained by subtracting 1 from max_vari and variati as max_vari-1.
on [category]. ).

The determination result of step S1204 is positive, that is, variation [category] is max.
If smaller than _vari-1, step S120
Proceed to 6 and change [category]
Is added to. As a result, the next variation number is selected in the variation arrangement in the category.

On the other hand, if the determination result of step S1204 is negative, that is, variation [category] is equal to max_vari-1, step S1.
Proceed to 208 and change [variation [categor
y] is set to 0 so that the first variation is selected next to the last variation.

Steps S1206 and S1
When the process of 208 is completed, the process proceeds to step S1210, 1 is assigned to ptn_cng, and then the process returns to step S420 of the main routine.

On the other hand, if the decision result in the step S1202 is negative, that is, the current category is the category of the pattern data stored in the floppy disk 22, the process advances to a step S1212, and next_re
It is determined whether ady is 1.

If the result of the determination in step S1212 is negative, that is, if next_ready is 0, the variation has not been loaded into the buffer.
Without performing any processing, the process directly returns to step S420 of the main routine.

On the other hand, if the determination result of step S1212 is affirmative, that is, next_ready is 1,
Since the variation has been loaded into the buffer, the process advances to step S1214, and variation [7] indicating the variation of the pattern data stored in the floppy disk 22 is the pattern_n.
It is determined whether it is smaller than um-1. That is, it is determined whether or not the variation number before the variation is changed by the variation currently being processed + the variation that has activated the processing routine + SW44a is smaller than the maximum value of the variation (variati).
Since on [category] starts from 0, pat
The value obtained by subtracting 1 from pattern_num as tern_num-1 is compared with variation [7]. ).

The determination result of step S1214 is affirmative, that is, variation [7] is pattern_nu.
If it is smaller than m-1, the process proceeds to step S1216, and 1 is added to variation [7]. As a result, the next variation number is selected in the variation array on the floppy disk 22.

On the other hand, the determination result of step S1214 is negative, that is, variation [7] is pattern.
If it is equal to _num-1, the process proceeds to step S1218, 0 is substituted into variation [7], and the pattern data of the first variation is selected next to the pattern data of the last variation. .

Steps S1216 and S1
When the process of 218 is completed, the process proceeds to step S1220.

In step S1220, temp
Substituting prev_buf into _buf, step S12
Proceed to 22.

In step S1222, prev
Substituting cur_buf into _buf, step S122
Go to 4.

In step S1224, cur_
Substitute next_buf into buf, and step S122
Go to 6.

In step S1226, next is set.
Substituting temp_buf into _buf, step S12
Proceed to 28.

Note that steps S1220 to S12
In the process of 1226, the stored contents of the pointer that points to the buffer is exchanged.

In step S1228, next
Substitute 0 for _ready and proceed to step S1230.

In step S1230, ptn_
Substitute 1 for cng and proceed to step S1232.

In step S1232, vari is acquired.
ation [7] is smaller than pattern_num-1.

The determination result of step S1232 is affirmative, that is, variation [7] is pattern_nu.
If it is smaller than m−1, the flow advances to step S1234 to read the variation [7] + 1st pattern data into BUF [next_buf].

On the other hand, the determination result of step S1232 is negative, that is, variation [7] is pattern.
If it is equal to _num-1, the process proceeds to step S1236, and the first (0th) pattern data is set to BUF [n
ext_buf].

When the processing of step S1234 or step S1236 is completed, step S123
The process proceeds to step 8, and 1 is assigned to next_ready, and then the process returns to step S420 of the main routine.

Further, the variation process in step S418 of the main routine will be described with reference to FIG. In this variation-processing routine, the same processing method as the variation + processing routine is used.

In the variation-processing routine, first in step S1302, the current category is processed.
ry is the pattern stored in the pattern memory 20.
Determine if it is a category of data.

If the determination result of step S1302 is affirmative, that is, if the current category is the category of the pattern data stored in the pattern memory 20,
The process advances to step S1304, and variation [ca
[tegory] is greater than 0. That is, it is determined whether or not the variation number before the variation is changed by the variation SW44b in which the variation-processing routine which is currently being processed is activated is larger than the minimum variation value.

If the result of the determination in step S1304 is affirmative, that is, if variation [category] is greater than 0, the flow advances to step S1306 to set var.
Subtract 1 from iation [category].
As a result, the previous variation number is selected in the variation arrangement in the category.

On the other hand, if the result of the determination in step S1304 is negative, that is, variation [category] is equal to 0, the flow advances to step S1308, and v
max_va in the allocation [czsegment]
Substituting ri-1 for the pattern of the first variation
Before the data, the pattern data of the last variation is selected.

Step S1306 and step S1
When the process of 308 is completed, the process proceeds to step S1310, 1 is assigned to ptn_cng, and then the process returns to step S420 of the main routine.

On the other hand, if the result of the determination in step S1302 is negative, that is, if the current category is the category of pattern data stored in the floppy disk 22, the process proceeds to step S1312 and prev_re
It is determined whether ady is 1.

If the result of the determination in step S1312 is negative, that is, if prev_ready is 0, it means that the variation has not been loaded into the buffer.
Without performing any processing, the process directly returns to step S420 of the main routine.

On the other hand, if the result of the determination in step S1312 is affirmative, that is, if prev_ready is 1,
Since the variation has been loaded into the buffer, the process advances to step S1314 to determine whether variation [7] indicating the variation of the pattern data stored in the floppy disk 22 is greater than zero. That is, it is determined whether or not the variation number before the variation is changed by the variation SW44b in which the variation-processing routine which is currently being processed is activated is larger than the minimum variation value.

If the result of the determination in step S1314 is affirmative, that is, if variation [7] is greater than 0, the process proceeds to step S1316 and variation is performed.
Subtract 1 from [7]. As a result, the previous variation number is selected in the variation arrangement in the category.

On the other hand, when the result of the determination in step S1314 is negative, that is, when variation [7] is 0, the process proceeds to step S1318, and variation is performed.
The pattern_num-1 is substituted into [7] so that the pattern data of the last variation is selected before the pattern data of the first variation.

Steps S1316 and S13
When the process of 18 is completed, the process proceeds to step S1320.

[0129] In step S1320, temp
Substituting next_buf into _buf, step S13
Proceed to 22.

In step S1322, next is selected.
Substituting cur_buf into _buf, step S132
Go to 4.

In step S1324, cur_
Substituting prev_buf into buf, step S132
Go to 6.

In step S1326, prev
Substituting temp_buf into _buf, step S13
Proceed to 28.

Note that steps S1320 to S13
In the process of 1326, the stored contents of the pointer that points to the buffer is exchanged.

In step S1328, prev
Substitute 0 for _ready and proceed to step S1330.

In step S1330, ptn_
Substitute 1 for cng and proceed to step S1332.

In step S1332, vari is set.
It is determined whether ation [7] is greater than 0.

If the result of the determination in step S1332 is affirmative, that is, if variation [7] is greater than 0, the process proceeds to step S1334 and variation is performed.
[7] -Set the 1st pattern data to BUF [prev
_Buf].

On the other hand, if the decision result in the step S1332 is negative, that is, if variation [7] is 0, the process advances to a step S1336, and pattern_nu.
The m-1st pattern data is set to BUF [prev_b
uf].

When the process of step S1334 or step S1336 is completed, step S133
The process proceeds to step 8, and 1 is assigned to prev_ready, and then the process returns to step S420 of the main routine.

Further, the automatic accompaniment pattern switching process and the automatic accompaniment data reading process shown as sub routines of the timer interrupt processing routine will be described.

First, the automatic accompaniment pattern switching processing will be described with reference to FIG. 14. In the automatic accompaniment pattern switching processing routine, the current category is changed.
The variation is switched according to y, variation [category], and a variable step_temp indicating a step time is used.

In the automatic accompaniment pattern switching routine, first in step S1402, the current category is switched.
“Ory” determines whether or not it is a category of pattern data stored in the floppy disk 22.

If the determination result of step S1402 is negative, that is, if the current category is the category of the pattern data stored in the pattern memory 20,
In step S1404, the pattern memory 20 retrieves category, variation [catego
The start address of the storage area in which the variation indicated by [ry] is stored is read into temp_ptr.

On the other hand, if the result of the determination in step S1402 is affirmative, that is, if the current category is the category of pattern data stored in the floppy disk 22, the process proceeds to step S1404, and cur_buf.
The start address of the buffer pointed to by temp_p
Substitute in tr.

Since temp_ptr at this point is the address at time 0, the current time step_count
I skim the variations until I reach.

When the processing of step S1404 or step S1406 is completed, step S140
Go to 8 and assign 0 to step_temp.

When the processing of step S1408 ends,
In step S1410, the data pointed to by temp_ptr is read, and the time (step time) until the next data written in the read data is set to step_
Add to temp.

When the process of step S1410 is completed,
In step S1412, the address of the next data is assigned to temp_prt.

When the processing of step S1412 is completed,
Progressing to step S1414, step_temp is st
It is determined whether or not ep_count or more.

If the result of the determination in step S1414 is negative, that is, if step_temp is smaller than step_count, steps S1410 to S14.
The processing of the loop of 14 is repeated.

On the other hand, the determination result of step S1414 is affirmative, that is, step_temp is step_count.
In the case of the above, the processing of the loop of steps S1410 to S1414 is skipped and step S141
Go to 6.

Therefore, step_temp is changed to step_
The process of reading the data pointed to by temp_ptr and adding the time until the next data written in the read data to step_temp is repeated until it becomes larger than count.

In step S1416, step_ne
The value of step_temp-step_count is substituted for xt.

When the processing of step S1416 is completed,
Proceed to step S1418, and tem to read_ptr.
Substitute _ptr.

When the processing of step S1418 is completed,
The process advances to step S1420, 0 is assigned to ptn_cng, and step S606 of the timer interrupt processing routine is performed.
Return to

Next, referring to FIG. 15, the automatic accompaniment data read processing will be described. In this automatic accompaniment data read processing routine, first, step S150.
In step 2, it is determined whether or not step_next is 0.

If the result of the determination in step S1502 is affirmative, that is, if step_next is 0, the flow advances to step S1504 to read the data pointed to by read_ptr.

When the processing of step S1504 is completed,
In step S1506, the event data in the data indicated by read_ptr read in step S1504 is output to the tone generator 28.

When the processing of step S1506 is completed,
In step S1508, step_next is updated. That is, the read read in step S1504
The data indicating the elapsed time (step time) until the next data in the data pointed to by _ptr is read is set to ste.
Copy to p_next.

When the processing of step S1508 is completed,
The process advances to step S1510, the address of the next data is assigned to read_ptr, and the process returns to step S1502.

If the pattern data read in step S1504 is the last pattern data, the address of the first pattern data of the pattern is substituted in read_ptr.

On the other hand, if the result of the determination in step S1502 is negative, that is, if step_next is not 0, the process advances to step S1512 and 1 is subtracted from step_next.

When the process of step S1514 is completed, 1 is added to step_count, and the main
Return to routine.

As described above, in the above-described embodiment, as shown in the conceptual configuration of FIG. 16, buffers (BUF (0), BUF) for storing variations are stored.
(1), BUF (2)) and a pointer (prev) indicating the array of variations stored in these buffers.
_Buf, cur_buf, next_buf) are provided, the contents of the pointer are rewritten when the variation is switched, and the variation (pattern data) is stored in advance according to the selection of the variation.

That is, during the performance of the variation N by selecting the variation N, the variation N is stored in the BUF (1) as shown in FIG. 16A, and the variations before and after the variation N are arranged in the variation array. It is assumed that N−1 and variation N + 1 are stored in BUF (0) and BUF (2), respectively. Here, when the variation N + 1 is selected, the variation N + 1 stored in BUF (2) becomes playing, as shown in FIG.
Variation (N + 2) is being loaded into (0). Then, when the loading of the variation N + 2 into BUF (0) is completed, the variation N + 2 becomes selectable (FIG. 16 (c)).

Therefore, when the automatic performance of the pattern of the pattern data stored in the floppy disk 22 is performed and the automatic accompaniment of the pattern data of the pattern data arranged before and after the automatic performance is switched, it can be instantaneously switched. Like

In the embodiment described above, in the automatic accompaniment stop state, the automatic accompaniment pattern switching operation (category switching operation, variation switching operation) is performed, and then the start operation is performed.
The pattern of the selected variation starts playing immediately, but not only that, even if the automatic accompaniment pattern switching operation is performed during the performance of the automatic accompaniment, the pattern of the variation being played is immediately selected. Switch to the pattern. Therefore, accompaniment patterns can be smoothly and successively switched while performing automatic accompaniment.

When the variation + SW44a (or variation-SW44b) is operated twice consecutively in a short period of time, the first variation + SW4
"Process for selecting next (previous) variation" corresponding to operation of 4a (or variation-SW44b)
It is possible that an instruction to select the next (previous) variation is issued during the execution of. Even in this case, the "processing for selecting the next (previous) variation" corresponding to the newly instructed variation is performed after the "processing for selecting the next (previous) variation" being executed is completed. Since the newly instructed variation has already been read at that time, the pattern of automatic accompaniment smoothly switches.

The above embodiment may be modified as follows. (1) In the above-described embodiment, as described with reference to FIG. 16, buffers (BUF (0), BUF (1), BUF (2)) that store variations, and
A pointer (prev_buf, cur_buf, pointer to the array of variations stored in these buffers)
Next_buf) is provided, and when the variation is switched, the contents of the pointer are rewritten so that the variation is stored in advance in accordance with the selection of the variation.

However, without providing the above-mentioned pointer, as shown in FIGS. 17A, 17B, and 17C, the array order of the variations stored in each buffer is fixedly set (BUF. The pattern used for performance is always stored in (1), and BUF (0) and BUF are stored.
The patterns arrayed before and after BUF (1) are stored in (2) and, respectively. ), When the variation is switched, the stored contents may be copied between the buffers.

(2) In the above embodiment, the variation + SW 44a or the variation -SW
Since only the next or previous variation of the currently selected variation can be selected by 44b, the next or previous variation of the currently selected variation is selected in advance and read from the floppy disk 22 and stored in the buffer. However, when performing a variation selection method other than that shown in the above-described embodiment, a variation other than that shown in the above-described embodiment is selected in advance and read from the floppy disk 22 and stored in the buffer. May be. That is, as shown in the above-described embodiment, the variation number is not changed one by one such that the variation number is changed one by one. For example, the variation number is changed one by one and
When a variation is selected in two or more dimensions, such as when it can be changed by 0, it is necessary to prepare a variation with one variation number and a variation with 10 different variation numbers in advance. Good.

(3) In the above embodiment, the variation + SW44a or the variation-SW
Since only the next or previous variation of the currently selected variation can be selected by 44b, the next or previous variation of the currently selected variation is selected in advance and read from the floppy disk 22 and stored in the buffer. However, if an arbitrary variation selection method is possible, variations other than those shown in the above embodiment may be selected in advance and read from the floppy disk 22 and stored in the buffer. For example, "read in advance the variations that are likely to be used."
Based on the idea, "remember the previously selected variation in the buffer", "remember the most frequently selected variation in the past based on the number of past selections", " A user can arbitrarily specify a variation that he or she often uses and memorize it in the specified variation. " Note that in this case, which buffer stores which variation is stored is managed, and when a new variation is selected, the selected variation is already stored in the buffer. If it is stored, the variation to be played is switched to the stored variation.If it is not stored, the indicated variation is read from the disc, and as soon as the reading is completed You may make it perform by the variation. Further, in this case, when the variation to be stored in the buffer in advance changes in accordance with the change in the selection state of the variation, the variation to be stored in advance is selected in accordance with the newly selected variation. Try to store it in a buffer.

(4) In the case as described in the above (3), "variation selected immediately before", "variation often selected in the past based on the number of past selections", "if used frequently" The user may arbitrarily select from the variation selection rules such as "the user specifies the variation that is considered". Alternatively, a plurality of variation selection rules may be combined. For example, the variations of the numbers on both sides of the currently selected variation are prepared in advance, and the variation selected immediately before is also prepared in advance.

(5) In the above embodiment, the variation + SW44a (or the variation -S)
When W44b) is operated three or more times continuously in a short time, the variation of the first variation + SW44
It may happen that an instruction to select the next (previous) variation is issued during the execution of the "processing to select the next (previous) variation" corresponding to the operation of a (or variation-SW 44b). obtain. In this case, a variation that is different from both the currently loaded variation and the currently loaded variation is required. To deal with such cases,
The operation of the variation + SW44a (or variation-SW44b) may be invalidated twice or more during the execution of the "processing for selecting the next (previous) pattern", but it is determined whether or not the manipulation of the operator is invalid for the user. However, it is not preferable because it is difficult to understand, and it causes an uncomfortable feeling. To deal with such cases,
When the variation + SW44a (or variation-SW44b) is operated more than once during the execution of the "processing for selecting the next (previous) variation", the "processing for selecting the next (previous) variation" being executed Alternatively, the pattern data corresponding to the newly instructed variation may be read into a buffer different from the buffer currently used for playing, and the variation may be played as soon as the reading is completed. In this case, it is preferable that the “variation selection process” be divided into a plurality of blocks so that it can be determined whether or not there is a new pattern selection instruction each time the process of each block ends.

(6) In the above embodiment, when the floppy disk 22 is not inserted, the categories and variations stored in the floppy disk are selected, that is, the floppy disk is selected by the user.
The operation of specifying the pattern data stored on the disk is disabled. In this case, a warning display indicating that the pattern data stored in the floppy disk cannot be designated may be displayed so that the user does not feel uncomfortable.

(7) In the above-mentioned embodiment, it does not matter whether the number of the floppy disks 22 that can be replaced is one or a plurality. However, for example, when there are several types of floppy disks 22, the floppy disk before replacement can be used. While playing the disk pattern, the floppy disk pattern after replacement may not be selectable, or the floppy disk pattern after replacement may be selectable.

When the pattern of the floppy disk after replacement cannot be selected, rewriting of the buffer for storing the pattern data is prohibited when the floppy disk is inserted during automatic accompaniment. There is a need to. Therefore, in such a case, the disc insertion interrupt process is not performed, and the process corresponding to the disc insertion interrupt process is performed when the automatic accompaniment is stopped thereafter.

When the pattern of the replaced floppy disk can be selected, a buffer for reading the pattern of the replaced floppy disk in advance is used as a buffer for storing the pattern data being played. Need to be provided separately.

(8) In the above embodiment, only one type of category is stored in the floppy disk 22, but a plurality of types of categories may be stored. In this case, a buffer for storing patterns in advance may be provided for each category, and a predetermined pattern for each category may be stored in advance when the floppy disk 22 is inserted.

(9) In the above embodiment, the case where the pattern data for automatic accompaniment is read from the external storage device has been shown, but other musical tone control parameters such as musical tone control parameters, automatic musical performance data, and waveform data may be read. The present invention can be applied to the case of reading data.

(10) In the above embodiment, the case where the data is read from the floppy disk has been shown, but in addition to this, it takes time to take in the data such as when taking the data through the communication line. It is effective to apply the present invention in some cases.

[0182]

Since the present invention is configured as described above, it is possible to quickly switch the reading of externally supplied data stored in an external storage device or the like without causing a significant increase in manufacturing cost. Therefore, even if the automatic accompaniment pattern is to be switched during the performance, it is possible to immediately switch the automatic accompaniment pattern.

[Brief description of drawings]

FIG. 1 is a block diagram of an automatic accompaniment apparatus including an externally-supplied data read control device for an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an operation panel unit.

FIG. 3 is an explanatory diagram showing a relationship between category selection buttons A42a to H42h, categories, and variations.

FIG. 4 is a flowchart showing a main routine.

FIG. 5 is a flowchart showing a disc insertion interrupt processing routine.

FIG. 6 is a flowchart showing a timer interrupt processing routine.

FIG. 7 is a flowchart showing a SW interrupt processing routine.

FIG. 8 is a flowchart showing a sub-routine of step / stop processing.

FIG. 9 is a flowchart showing a sub-routine of automatic accompaniment start processing.

FIG. 10 is a flowchart showing a sub-routine of automatic accompaniment stop processing.

FIG. 11 is a flowchart showing a sub routine of category processing.

FIG. 12 is a flowchart showing a sub routine of variation + processing.

FIG. 13 is a flowchart showing a variation-processing sub-routine.

FIG. 14 is a flowchart showing a sub-routine of automatic accompaniment pattern switching processing.

FIG. 15 is a flowchart showing a sub-routine of automatic accompaniment data reading processing.

FIG. 16 is an explanatory diagram showing an operation example of the embodiment of the present invention.

FIG. 17 is an explanatory diagram showing an operation example of a modified example of the present invention.

[Explanation of symbols]

 10 CPU 12 Bus 14 Timer 16 Program Memory (ROM) 18 Working Area (RAM) 20 Pattern Memory (ROM) 22 Floppy Disk 24 Floppy Disk Drive 26 Manipulator 28 Tone Generator 30 Amplifier 32 Speaker

Claims (3)

[Claims] 1. An externally supplied data having a predetermined music information section as a unit supplied from the outside is read and temporarily stored in an internal storage means, and an operation is performed based on the externally supplied data stored in the internal storage means. In the electronic musical instrument to be controlled, an internal storage means having a storage area capable of storing a plurality of units of externally-supplied data having a predetermined music information section supplied from the outside as a unit and updating the stored contents, Selecting means for arbitrarily selecting externally supplied data to be processed for operation control from a plurality of units of externally supplied data stored in the internal storage means according to a user's selecting operation; The external supply data having a predetermined relationship with the external supply data selected by the means is read and read into the internal storage means, and the storage content of the internal storage means is updated. An externally-supplied data read control device for an electronic musical instrument, comprising: a control means. 2. The selecting means selects one unit of externally supplied data from a plurality of units of externally supplied data stored in the internal storage means, and the control means is selected by the selecting means. In a storage area other than the storage area of the internal storage means in which the external supply data for one unit is stored, the external supply data in a predetermined relationship with the external supply data for one unit selected by the selecting means is stored. 2. The externally-supplied data read control device for an electronic musical instrument according to claim 1, wherein the control unit reads the data for each unit and updates the stored contents of the internal storage means. 3. The internal storage means is capable of storing at least three units of externally supplied data arranged in a predetermined order for each unit, and the control means is equivalent to one unit selected by the selecting means. 1 selected by the selecting means in a storage area for two units other than the storage area in which the externally supplied data of
3. The externally supplied data for two units arranged before and after the externally supplied data for each unit is read for each unit, and the storage contents of the internal storage means are sequentially updated. Externally-supplied data read-out control device for electronic musical instrument.