JP2556640B2 - Automatic playing device - Google Patents

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,
Particularly, it relates to the control of fast-forwarding of automatic performance.

[0002]

2. Description of the Related Art Conventionally, an automatic performance device is generally constructed as follows. That is, a plurality of combinations of musical tone information and time information are stored in the sequence memory, and the combinations of musical tone information and time information are read out. On the other hand, a time counter that keeps track of time is provided, and a clock signal of a constant frequency is sent to this time counter. Then, the time count value of this time counter is compared with the time information of the combination of the read musical tone information and time information, and if the time count value becomes larger than the time information,
A process based on the tone information, which is a combination of the tone information and the time information, is performed, for example, a sounding / muting process. Further, after this processing, the next combination of the musical tone information and the time information is read out, and the above processing is repeated.

Conventionally, there are the following two devices for performing such fast-forwarding of automatic performance. First, as shown in FIG. 9, a low-speed clock generator 91 that oscillates and outputs a normal low-frequency clock signal and a high-speed clock generator 92 that oscillates and outputs a high-frequency clock signal are provided. Then, the low-frequency clock signal and the high-frequency clock signal are sent to the time counter 94 through the switching circuit 93 and the bus line. In the switching circuit 93, the high frequency clock signal is selected when there is a fast-forward instruction, and the low-frequency clock signal is selected when there is no fast-forward instruction. As a result, if there is a fast-forward instruction, the time counter 94 is incremented at high speed, and as a result, the progress of the automatic performance becomes faster.

As shown in FIG. 10, the clock signal oscillated and output from the clock generator 95 is input to the frequency divider 96 to be converted into a normal low frequency clock signal and a normal high frequency clock signal. Then, the low-frequency clock signal and the high-frequency clock signal are sent to the time counter 94 through the switching circuit 97 and the bus line. The switching circuit 97 selects the high frequency clock signal when there is a fast-forward instruction, and selects the low-frequency clock signal when there is no fast-forward instruction. Accordingly, if there is a fast-forward instruction, the time counter 94 is incremented at high speed, and as a result, the automatic performance progresses faster.

[0005]

However, in the above two devices, in addition to the normal low frequency clock signal, a harmonic clock signal must be output, and a plurality of clock generators 91, 92 or frequency dividers are required. 96 is required, which complicates the circuit configuration and causes a cost increase.

The present invention has been made in order to solve the above-mentioned problems and does not require a circuit for generating a high-frequency clock signal, so that the automatic performance can be fast-forwarded without complicating the circuit configuration. It is intended to provide an automatic performance device that can perform.

[0007]

In order to achieve the above object, the present invention converts the progress time data indicating the progress of time into a larger conversion time data value, and performs automatic performance according to this data. It is the one. In the conversion, for example, the conversion time data is stored in association with the progress time data, and is read out, or an operation for increasing the rate of change of the progress time data is performed, or during normal performance. Is to convert the progress time data into a smaller value, or to convert the time information in the automatic performance information into a smaller value. That is, the present invention is such that the change rate of the progress time data is relatively large with respect to the time information in the automatic performance information.

[0008]

As a result, only the progress time data or the time information of the automatic performance information needs to be converted, and the circuit for generating the high frequency clock signal is not required. Therefore, the circuit structure can be simplified.

[0009]

[Example] 1. Overall Circuit FIG. 1 shows the overall circuit of an automatic performance device for an automatic performance piano. In the panel switch group 1, control instructions for automatic performance, which will be described later, and the like are performed. The key data indicating the operation content of each key of the panel switch group 1 is temporarily stored in the input / output interface 2 and given to the CPU 5 via the bus line 3 to execute the processing according to the operation key. The key data has the same number of bits as the number of keys of the panel switch group 1, and the bit corresponding to the operation key is "1". The panel switch group 1 may output a high-level signal from a voltage source through an ON key, or may perform a key scan using a sampling signal. Data, information, address data and the like are sent via the bus line 3.

Display data sent from the CPU 5 or the like via the bus line 3 and the input / output interface 2 is input to the display 4 for display. This display data is the operation contents of the panel switch group 1 and the CP.
The processing contents of U5, performance time, etc. are shown. An automatic performance information API is stored in the floppy disk 8, and this automatic performance information API is loaded into the RAM 6 through the input / output interface 2 and the bus line 3 via the floppy disk driver 9 for each song or all songs. Is
Automatic performance is performed. On the contrary, the automatic performance information API in the RAM 6 may be saved in the floppy disk 8. The floppy disk 8 can be replaced with a RAM / ROM card, a magnetic tape, a magnetic disk, an optical disk, or the like.

In addition to the automatic performance information API, the RAM 6 also stores various data processed by the CPU 5. A time counter 10 is also formed in the RAM 6. The time counter 10 is incremented according to the clock signal φ generated from the clock generator 11 to count the progress time data PT.
That is, the clock signal φ is given to the CPU 5, and every time the clock signal φ becomes high level, an interrupt process described later is executed. In this process, the time counter 1
0 is incremented by 1.

The time counter 10 may be connected to the clock generator 11 so as to be incremented directly according to the clock signal φ. The frequency of the clock signal φ from this clock generator 11 is constant. However, it is also possible to make it correspond to the tempo data set in the panel switch group 1. In response to this, the normal automatic performance speed and the automatic performance fast-forward speed also change according to the set tempo.

The ROM 7 stores a program corresponding to a flowchart described later, which is executed by the CPU 5, and a program corresponding to other processing. This ROM
An expansion conversion time table 12a and a normal conversion time table 12b are also formed in the table 7. In the expansion conversion time table 12a, the expansion conversion time data E obtained by converting the progress time data PT of the time counter 10 into a larger value.
Many CTs are stored. The normal automatic performance is executed on the basis of the normal conversion time data NCT obtained by converting the progress time data PT of the time counter 10 by the normal conversion time table 12b, but the fast forward of the automatic performance is expanded conversion of the progress time data PT. This is executed based on the expanded conversion time data ECT converted by the time table 12a.

The solenoid 14 is provided below each key and pedal of the automatic playing piano.
When the keys 4 and 4 are activated, the keys and pedals of the piano are turned on, and when the solenoids 14 are stopped, the keys and pedals are turned off. The automatic performance information API in the RAM 6 is the CPU
The data is read out by 5 and sent to the solenoid driver 13 to drive / stop the solenoid 14. Thereby, the automatic performance of the piano is performed.

The panel switch group 1 is provided with a rewind key 21, a play key 22, a forward key 23, a record key 24 and a stop key 25.
The rewind key 21 is a key for instructing fast rewind of the automatic performance. The play key 22 is a key for instructing a normal automatic performance. The forward key 23 is a key for instructing fast forward of an automatic performance. The record key 24 is a key for instructing recording of the automatic performance information API. The stop key 25 is a key for instructing to stop the automatic performance.

The panel switch group 1 is also provided with a load key, a save key, a power key, etc., which are not shown. The load key is a key for instructing the automatic performance information API of the floppy disk 8 to be loaded into the RAM 6, and the save key is a key for instructing the automatic performance information API of the RAM 6 to be saved in the floppy disk 8. In addition, the panel switch group 1 is provided with a key group for setting a tempo, a key group for selecting music, and the like.

2. Automatic Performance Information API FIG. 2 shows the automatic performance information API stored in the floppy disk 8 or the RAM 6. The automatic performance information API includes a plurality of combinations of the header HD, the tone information MI, and the time information TI. Music information MI
Further comprises key number data KN and touch data TC. The header HD is one set of musical sound information MI
And identification data of the time information TI.

The key number data KN is number data indicating each key on the keyboard of the automatic performance piano and indicates a pitch. The key number data KN also includes data indicating key-on ("1") and key-off ("0"). In place of the key number data KN, data indicating ON / OFF of each pedal may be stored. The touch data TC is also called velocity data, and is data indicating the strength or speed of the on / off of the key. The time information TI is information indicating the timing at which the tone information MI is executed. These musical sound information MI and time information T
I is stored in the floppy disk 8 in the order of performance.

Further, some reference time information ST is also stored in the automatic performance information API. Reference time information S
As shown in the lower part of FIG. 8, T is a reference “0” point of the time information TI, and the time information TI shows the elapsed time from this point. That is, the time information TI indicates not the relative time but the absolute time. Reference time information ST
Can also be replaced with bar mark data. The bar mark data indicates a bar division.

The reference time information ST is, for example, a count value "100" of the time counter 10 at predetermined time intervals.
Every 500 milliseconds. At this time, the time counter 10 is cleared to "0" and the performance time data is incremented by +0.5. The reference time information ST includes a header HD and three dummy data. This header HD indicates that it is the reference time information ST. Header H of reference time information ST
The data format of D is different from the data format of the header HD of the tone information MI. The automatic performance information API can also include song name data, song number data, tempo data, bit data, effect data, and the like.

3. RAM6 FIG. 3 shows various registers in the RAM6. That is,
In the RAM 6, a mode flag register 31, a sequence buffer register 32, a conversion time register 33, an address point register 34, and the time counter 10 described above.
Are formed. The mode flag register 31 stores flag data indicating that the rewind key 21, the play key 22, the forward key 23, the record key 24, and the stop key 25 are turned on. This flag data is "1" set in the bit corresponding to each key 21-25.

The sequence buffer register 32 temporarily stores a set of musical tone information MI and time information TI which are sequentially read out from the automatic performance information API. The conversion time register 33 stores expanded conversion time data ECT or normal conversion time data NCT which will be described later. The address point register 34 stores address data AD indicating an access address of the automatic performance information API in the RAM 6.

[0023] 4. Expansion Conversion Time Table 12a FIG. 4 shows the expansion conversion time table 12a of the ROM 7. "0000" in the expanded conversion time table 12a,
"0001", "0002", "0003" ... "001"
"09", "19", "29", "39" at address 0 "
The expanded conversion time data ECT of "100" is stored. These "0000", "0001", "0002"
The address data of "0010" corresponds to the progress time data PT, and the progress time data PT has a larger value, that is, a value of (10 times +9), "09" in the expanded conversion time table 12a. "," 19 "," 2
9 "..." 100 "expanded conversion time data ECT is converted.

When the automatic performance is fast-forwarded, the automatic performance information A
The time information TI of PI is compared with the expanded conversion time data ECT for automatic performance, and during normal automatic performance, the time information TI is compared with normal conversion time data NCT described later for automatic performance. The expansion conversion time data ECT of the expansion conversion time table 12a is not limited to the above-described one, and may be, for example, "08", "16", "24", "3".
2 ”...,“ 10 ”,“ 18 ”,“ 26 ”,“ 34 ”,
"42" ... may be used. Also, the expanded conversion time data EC
T takes a value from "00" to "100", but if the reference time information ST is stored at an interval other than "100", it can take a value outside this range. Furthermore, 12 or more,
Ten or less pieces of expanded conversion time data ECT may be stored in the automatic performance information API.

[0025] 5. Normal Conversion Time Table 12b FIG. 5 shows the normal conversion time table 12b of the ROM 7. "0000" and "0" in the normal conversion time table 12b
"001", "0002", "0003" ... "0100"
At the address, "00", "01", "02", "03" ...
The normal conversion time data NCT of "100" is stored. These "0000", "0001", "0002" ...
The address data "0100" corresponds to the above-mentioned progress time data PT, and this progress time data PT is the normal conversion time data N in the normal conversion time table 12b.
Converted to CT.

In the example of FIG. 5, normal conversion time data NCT
Is equal to the progress time data PT, the normal conversion time table 12b is not used, and the progress time data PT can be directly used as the normal conversion time data NCT. But,
When the value of the normal conversion time data NCT shown in FIG. 5 is changed with respect to the progress time data PT, the normal conversion time table 12b is necessary. For example, "01",
"02", "03", "04", "05", "06" ...
For the progress time data PT of “10”, “11” ...
For example, "00", "00", "01", "01",
Normal conversion time data NCT of "02", "02" ... "05", "05" ... "02", "04", "06",
"08", "10", "12" ... "20", "22" ...
This is the case when converting to the normal conversion time data NCT.

The normal conversion time data NCT is
The progress time data PT may be converted to a smaller value, and the expanded conversion time data ECT may be used as the progress time data PT as it is or may be converted to a value closer to the progress time data PT. In this case, if the frequency of the clock signal φ is increased, the normal automatic performance and the fast-forwarding of the automatic performance can be similarly switched.

[0028] 6. Interrupt Process FIG. 6 shows a flowchart of the interrupt process executed by the CPU 5. In this process, the progress time data PT of the time counter 10 is sequentially incremented (step 12), and if the automatic performance is fast-forwarding, the progress time data PT is converted into the expanded conversion time data ECT (step 15), and the normal automatic operation is performed. If the performance is in progress, the progress time data PT is converted into normal conversion time data NCT (step 19). This process is performed by the clock generator 11
Is executed every time the clock signal φ applied to the CPU 5 goes high.

In this process, it is first determined whether or not the automatic performance is being performed (step 11). This determination is made based on whether the corresponding bit of the play key 22 or the forward key 23 in the mode flag register 31 is "1".
Then, the time counter 10 is incremented by 1 (step 1
2) It is determined whether or not the forward key 23 is turned on (step 13). In this determination, the corresponding bit of the forward key 23 in the mode flag register 31 is "1".
It is done based on whether or not.

If the forward key 23 is turned on,
The progress time data PT of the time counter 10 is read (step 14), converted into expanded conversion time data ECT by the expanded conversion time table 12a (step 15), and set in the conversion time register 33 (step 16).
As a result, the progress time data PT of the time counter 10
Is incremented by 1 for each interrupt process, and the progress time data P
T is enlarged to a size of (10 times +9).

In step 13, the play key 2
If 2 is turned on, the progress time data PT of the time counter 10 is read (step 18), converted into the normal conversion time data NCT in the normal conversion time table 12b (step 19), and stored in the conversion time register 33. It is set (step 16), other processing is executed (step 20), and the original processing is returned. As a result, the progress time data PT of the time counter 10 is incremented by 1 for each interrupt process, and the progress time data PT is not expanded but is processed as it is.

Here, in the determination processing of the flag data of the rewind key 21 of the mode flag register 31 in step 13, the expansion conversion time table 12a or the normal conversion time table 12b is selected, that is, the expansion conversion time data ECT. And the normal conversion time data NCT are switched and selected.

In step 19, the progress time data PT may be set in the conversion time register 33 as it is without converting the progress time data PT to the normal conversion time data NCT in the normal conversion time table 12b.

Further, in the above step 15, the progress time data PT may be multiplied by a value of "1" or more, for example, "9", instead of converting the progress time data PT by the expanded conversion time table 12a. , The progress time data PT may be incremented by +9 every time the clock signal φ becomes high level.
Then, the expansion conversion time table 12a becomes unnecessary.

Further, the normal conversion time data NCT stored in the normal conversion time table 12b may be a value that makes the progress time data PT smaller, for example, the progress time data PT set to "1/9". Step 19
Then, the progress time data PT has a value equal to or less than “1”, for example
/ 9 "may be multiplied, or" 1/9 "may be added to the progress time data PT each time the clock signal φ becomes high level. Such progress time data PT is calculated. At this time, the time counter 10 may not be cleared in step 01 described later.

7. Automatic Performance Processing FIG. 7 shows a flowchart of the automatic performance processing executed by the CPU 5. In this process, the automatic performance information AP
I is read (steps 06 and 02), and if the reference time information ST is read, the process waits (steps 03 and 04),
When the musical tone information MI and the time information TI are read, the event is executed at the timing according to the time information TI (steps 07 and 08). In this case, the expanded conversion time data ECT of step 07 is expanded more than the normal conversion time data NCT, so that the event is executed faster.

This process is started by turning on the play key 22 or the forward key 23 in the key process in the main routine. The main routine is
It is started by turning on the power key, and after the initialization process, the key process is repeated. In the initialization process, the RAM 6, the input / output interface 2, and the solenoid driver 13 are cleared of all data.
In this case, if the start address of the load destination of the automatic performance information API to the RAM 6 is not "00 ... 0", the address data AD of the address point register 34 of the RAM 6 is set to the same value as this start address.

First, when the play key 22 is turned on, initialization processing is performed (step 01). In this initialization process, the time counter 1 of the RAM 6
0, conversion time register 33, mode flag register 31
Etc. are cleared, and flag data of "1" is set in the corresponding bit of the play key 22 of the mode flag register 31.

Even if the forward key 23 is turned on, the initialization process is performed (step 01).
In this initialization processing, the time counter 10, the conversion time register 33, the mode flag register 31, etc. are cleared, and the corresponding bit of the forward key 23 of the mode flag register 31 is set with "1" flag data. The time counter 10 is incremented by 1 each time the clock signal φ supplied from the clock generator 11 to the CPU 5 goes high. This +1 is performed as one of the interrupt processes.

Next, the address point register 3
The information of the automatic performance information API in the RAM 6 designated by the address data AD of 4 is read out and set in the sequence buffer register 32 (step 02). Here, if the reference time information ST is read (step 0
3) The process waits until the expanded conversion time data ECT or the normal conversion time data NCT becomes "100", that is, the timing corresponding to the reference time information ST (step 04). Extended conversion time data ECT
Alternatively, the normal conversion time data NCT is obtained by the above step 16
Is set in the conversion time register 33. When the conversion time data ECT and NCT become "100", the time counter 10 is cleared (step 05), the performance time data is +0.5, and the address point register 34 is +4 (step 06).

In step 02, the musical tone information MI
And the time information TI is read, this time information TI
And the expanded conversion time data ECT or the normal conversion time data NCT are compared (step 07). If the conversion time data ECT and NCT are still smaller, the process stands by. As time passes, the conversion time data ECT,
When the NCT becomes equal to or more than the time information TI, an event corresponding to the musical tone information MI in the sequence buffer register 32 is executed (step 08). Then, the address point register 34 is incremented by 4 (step 0
6).

In this case, if the forward key 23 is turned on, the progress time data PT of the time counter 10 is expanded to the size of (10 times +9) in the above step 15, and therefore the expansion conversion is executed in the step 07. Time data EC
The time until T exceeds the time information TI of the automatic performance information API is shortened, and the next event is advanced earlier. Thus, the automatic performance can be fast-forwarded without increasing the frequency of the clock signal φ.

The above-mentioned event execution processing is not driving a key or pedal, but is merely preparation for the next event reading, accumulation of performance time data, and the like. The driving of the keys and pedals is performed in the reproduction process of step 10 described later. This reproduction process is not executed during fast-forwarding of the automatic performance.
Therefore, the fast-forwarding of the automatic performance proceeds silently. This is because the drive of the solenoid 14 does not follow the fast-forward of the automatic performance during the fast-forward. Of course, the processing of step 09 may be omitted, and the keys and pedals may be driven during fast-forwarding of the automatic performance.

In step 07, the time information TI
When the normal conversion time data NCT is compared with the normal conversion time data NCT, the normal conversion time data NCT has the same value as the progress time data PT. Therefore, in step 07, the normal conversion time data NCT is the time information TI of the automatic performance information API. Normal automatic performance is performed without shortening the time over.

After the above step 06, the forward key 2
It is determined whether or not 3 is turned on (step 09).
This determination is made based on whether or not the corresponding bit of the forward key 23 in the mode flag register 31 is "1". If the forward key 23 is turned on, the process returns to step 02 and the automatic performance process is repeated.

In step 09, the play key 2
If 2 is turned on, the reproduction process is executed (step 10). This reproducing process is a process of sending data corresponding to the touch data TC to the input line of the solenoid driver 13 corresponding to the key number data KN of the musical tone information MI. As a result, the key or pedal corresponding to the key number data KN is driven at the speed or strength corresponding to the touch data TC.

The above-mentioned automatic performance processing is performed by the stop key 25.
When is turned on, the reading of the program corresponding to this automatic performance process is unconditionally stopped, and the process ends. The sequence buffer register 32 and the address point register 34 are cleared by turning on the power key, and the play key 22, the forward key 23, and the rewind key 2
1. If the stop key 25 is turned on, it will not be cleared. Of course, you may clear by turning on these keys 21, 22, 23, 25. Then, these keys 21, 22,
The processing according to the operations of 23 and 25 is executed from the beginning or the end of the music.

Further, the following processing may be executed between step 03 and step 07. That is,
As in step 09, it is determined whether the forward key 23 is on or off, and if the forward key 23 is on,
If the time information TI read in step 02 is converted to a smaller value and the play key 22 is turned on,
Do nothing and proceed to step 07.

This conversion of the time information TI may have the same structure as the expanded conversion time table 12a, and a memory that stores a smaller value of the time information TI may be used, or the time information TI may be "1" or less. , For example, “1/9” may be multiplied. Even in this case, the automatic performance can be fast-forwarded in the same manner. If the play key 22 is turned on, the time information TI is converted into the normal conversion time table 1
The conversion may be performed in 2b and the process may proceed to step 07.

In the automatic performance process of FIG. 7, the stop key 25
Is repeated until is turned on. However, the processing of FIG. 7 is performed only when the forward key 23 or the play key 22 is turned on, and if “NO” in the step 07,
Then, the process may return. In this case, after step 16 of the above-described interrupt processing, step 02 is entered and the processing of steps 02 to 10 is performed. If “NO” in step 07 of these, the processing is returned to the original processing.

The automatic performance process of FIG. 7 can also be executed with the following contents. If "NO" in the above step 07, step 1 of the interrupt processing in FIG.
The processes of 3 to 16 and 18 to 19 are performed, and the process returns to step 07. Then, the interrupt process becomes unnecessary. However, only the increment processing of the time counter 10 in step 12 is necessary.

7. Example of fast-forward of automatic performance FIG. 8 shows an example of fast-forward of automatic performance. In the figure,
“E1”, “e2” ... Denote musical tone information MI, and “S”
T "indicates the reference time information ST. Now, the musical tone information MI and the reference time information ST are as shown in the lower part of FIG.
It is stored in the absolute time system. "E1" and "e" in FIG.
It is assumed that the musical tone information MI of "2" and "e3" is executed by a normal automatic performance, and the forward key 23 is turned on at the point A.

Then, all the data sent to the solenoid driver 13 are cleared, the keys and pedals are turned off, and the conversion time register 33 and the time counter 1 are turned on.
0 is cleared (step 01). At this time, "e
The musical tone information MI of 4 "is the sequence buffer register 32.
Set to, waiting for the arrival of execution timing.

Then, the progress time data PT of the time counter 10 cleared to "00" is converted into the expanded conversion time data ECT of "09" in the expanded conversion time table 12a (step 15). Then, since the time information TI of "e4" is "8" (step 07), the musical tone information MI of "e4" is immediately executed (step 08),
The next "e5" tone information MI and time information TI are read (step 02). This "e5" time information TI
Is "9" (step 07), the musical tone information MI of "e5" is also immediately executed (step 0).
8). In this way, the musical tone information MI of "e4" and "e5" is continuously executed.

Next, when the progress time data PT of the time counter 10 becomes "01", this progress time data PT is converted into the extended conversion time data ECT of "19" in the extended conversion time table 12a (step 15). . Then
Similarly, the musical tone information MI of "e6", "e7", "e8", and "e9" is continuously executed (steps 07, 0).
8, 06, 02). Thus, the automatic performance can be fast-forwarded without increasing the frequency of the clock signal φ.

Next, it is assumed that the play key 22 is turned on at point B in FIG. Then, all the data sent to the solenoid driver 13 are cleared, the key and the pedal are turned off, and the conversion time register 33 and the time counter 10 are cleared (step 01). At this time,
The tone information MI of "e10" is set in the sequence buffer register 32 and waits for the execution timing.

Since the progress time data PT of the time counter 10 is cleared to "00" and the time information TI of "21" of "e10" is set in the sequence buffer register 32, the progress time data PT is set. No musical sound information MI is executed until PT becomes “21”. When the progress time data PT becomes "21" (step 07), the musical tone information MI of "e10" is executed (step 08), and the musical tone information MI and time information TI of the next "e11" are read (step). 02). After this, normal automatic performance is continued.

In the example of FIG. 8, the automatic performance is not fast-forwarded beyond the reference time information ST, but the fast-forwarding is performed for a short section, but it is of course possible to perform the automatic performance fast-forward beyond the reference time information ST. Is.

Note that such fast-forwarding of the automatic performance is performed by the automatic performance information AP stored in the absolute time system shown in the lower part of FIG.
It can only be performed for I. However, the automatic performance described above cannot be disabled for the automatic performance information API stored by the relative time method shown in the upper part of FIG. In this case, the time information TI of the relative time system is accumulated every time it is read in step 02, and the accumulated time information TI and the expanded conversion time data ECT or the normal conversion time data N is accumulated.
CT will be compared in step 07. Then, the processes of steps 03 to 05 in FIG. 7 are omitted.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the present invention can be applied to an electronic musical instrument.
In this case, in the execution processing of the musical tone information MI in step 08, the musical tone information MI is converted into a tone generator or MIDI.
Send to interface. Also, a floppy disk 8
The automatic performance information API may be a signal in which a signal detected by a key sensor is stored by a key operation of an automatic performance piano, or data input by a computer.

Furthermore, when converting the progress time data PT in steps 15 and 19, the conversion may be performed based on a specific arithmetic expression. This arithmetic expression is, for example, ECT =
a (PT) ± b, a (PT) ² ± b, b / {a (P
T)} (a, b: constant, PT: progress time data, EC
T: expanded conversion time data). In addition to the floppy disk 8 and the RAM 6, the automatic performance information API may be stored in a RAM / ROM card, a magnetic tape, a magnetic disk, an optical disk, or the like.

[0062]

As described above in detail, according to the present invention, the progress time data indicating the progress of time is converted into a larger conversion time data value, and the automatic performance is performed according to this data. . This conversion is performed, for example, by storing the conversion time data in correspondence with the progress time data, reading the conversion time data, performing an operation for increasing the rate of change of the progress time data, or performing a normal performance. Is to convert the progress time data into a smaller value, or to convert the time information in the automatic performance information into a smaller value. Therefore, it is only necessary to convert the time information of the progress time data or the automatic performance information, and a circuit for generating a high frequency clock signal is not required. As a result, the circuit configuration can be simplified.

[Brief description of drawings]

FIG. 1 is an overall circuit diagram of an automatic performance piano.

FIG. 2 is a diagram showing automatic performance information API stored in a floppy disk 8 or a RAM 6.

FIG. 3 is a diagram showing various registers of a RAM 6;

FIG. 4 is a diagram showing an enlarged conversion time table 12a in a ROM 7.

FIG. 5 is a diagram showing a normal conversion time table 12b of a ROM 7.

FIG. 6 is a diagram showing a flowchart of an interrupt process.

FIG. 7 is a diagram showing a flowchart of automatic performance processing.

FIG. 8 is a diagram showing an example of fast-forwarding of automatic performance.

FIG. 9 is a circuit diagram showing a conventional example.

FIG. 10 is a circuit diagram showing a conventional example.

[Explanation of symbols]

1 Panel switch group, 5 CPU, 6 RAM, 7
ROM, 8 ... Floppy disk, 10 ... Time counter, 11 ... Clock generator, 12a ... Enlarged conversion time table, 12b ... Normal conversion time table, 14 ... Solenoid, 21 ... Rewind key, 22 ... Play key,
23 ... Forward key, 24 ... Record key, 25 ... Stop key, 31 ... Mode flag register, 32 ... Sequence buffer register, 33 ... Conversion time register, 3
4 ... Address point register.

Claims (8)

(57) [Claims] 1. A storage means for storing a plurality of combinations of tone information and time information, and a combination of the tone information and time information from the storage means.
In an automatic performance device provided with an information reading means for reading out in the order of progress of a performance, a time stepping means for ticking the progress of time, and progress time data ticked by the time ticking means,
Switching selection for switching and selecting time data conversion means for converting to a larger value during fast-forwarding of automatic performance, conversion time data converted by this time information conversion means, and progress time data carved by the time stepping means. Means, a comparing means for comparing either the conversion time data or the progress time data switched and selected by the switching selecting means with the time information read by the information reading means, and a comparison result of the comparing means. Accordingly, the automatic musical instrument is provided with musical tone processing means for performing fast-forwarding of automatic musical performance or normal automatic musical performance by performing processing based on the musical tone information read by the information reading means. 2. The time data conversion means stores conversion time data group obtained by converting the progress time data carved by the time stepping means into a larger value, and the conversion data storage means. 2. The automatic musical instrument according to claim 1, further comprising: conversion data reading means for reading conversion time data corresponding to the progress time data carved by the time stepping means. 3. The automatic performance apparatus according to claim 1, wherein the time data converting means performs a calculation for increasing the rate of change of the progress time data carved by the time stepping means. 4. Storage means for storing a plurality of combinations of tone information and time information, and a combination of tone information and time information from the storage means.
In an automatic performance device provided with an information reading means for reading out in the order of progress of a performance, a time stepping means for ticking the progress of time, and progress time data ticked by the time ticking means,
During normal automatic performance, time data conversion means for converting to a smaller value, conversion time data converted by the time data conversion means, and progress time data carved by the time stepping means are selected for switching. Means, a comparing means for comparing either the conversion time data or the progress time data switched and selected by the switching selecting means with the time information read by the information reading means, and a comparison result of the comparing means. Accordingly, the automatic musical instrument is provided with musical tone processing means for performing fast-forwarding of automatic musical performance or normal automatic musical performance by performing processing based on the musical tone information read by the information reading means. 5. The time data conversion means stores conversion time data groups obtained by converting the progress time data carved by the time stepping means into smaller values, and the conversion data storage means. 5. The automatic musical instrument according to claim 4, further comprising conversion data reading means for reading the conversion time data corresponding to the progress time data carved by the time notifying means. 6. The automatic musical instrument according to claim 4, wherein the time data converting means converts the rate of change of the progress time data carved by the time stepping means into a smaller value. 7. The automatic musical instrument according to claim 1, wherein the musical tone processing means executes musical tone information after the musical tone information which has already been executed when a fast-forward instruction is given. 8. Storage means for storing a plurality of combinations of tone information and time information, and a combination of tone information and time information from the storage means.
In an automatic performance device provided with information reading means for reading in the order of progress of a performance, time information conversion means for converting the time information read by this information reading means into a smaller value during fast-forwarding of the automatic performance, and this time The conversion time information converted by the information conversion means and the time information read by the information reading means are switched and selected by switching selection means, a time stepping means for ticking the progress of time, and the switching selection means. Comparing means for comparing either the conversion time information or the time information selected by switching with the progress time data engraved by the time stepping means, and read by the information reading means in accordance with the comparison result of the comparing means. By performing processing based on the generated musical tone information, the musical tone processing that performs fast-forwarding of automatic performance or normal automatic performance Automatic performance apparatus characterized by comprising a means.