JPH08115084A - Automatic playing device - Google Patents

Abstract

PURPOSE: To smoothly connect and play plural musics by instantaneously or gradually change the volume, the tempo and the key when playing plural musics and transitioning from a first music to a second music. CONSTITUTION: The entire operations are controlled by a CPU 10. The CPU 10 is connected to a ROM 14, a RAM 16, an operation panel section 18, an MIDI output device 22 and a floppy disk control device 26. A reading means simultaneously reads playing data of the first and the second musics. A playing level control means performs a control so that the playing level of the first music is gradually reduced and simultaneously the playing level of the second music is gradually increased. Thus, a cross fade effect is obtained when the first and the second musics are connected and the connection is made smooth.

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,
More specifically, the present invention relates to an automatic performance device that is provided with storage means for storing performance data of a plurality of songs, and can read the performance data of a desired song stored in the storage means to perform the desired song. .

[0002]

BACKGROUND OF THE INVENTION Generally, in an automatic performance apparatus, performance data for a plurality of songs is stored in a memory such as a read only memory (ROM) or a floppy disk. The performance data of a desired music piece can be selected from the performance data of a plurality of music pieces stored in the memory, and the performance of the desired music piece can be performed.

However, in such a conventional automatic performance device, a plurality of music pieces cannot be played at the same time. Therefore, for example, when the performance of the first music piece is changed to the performance of the second music piece, the volume of the first music piece is changed. There is a problem in that the volume of the second song is gradually increased and at the same time the volume of the second song is gradually increased, so-called crossfade cannot be applied to smoothly connect the first song and the second song. .

Further, when a plurality of music pieces are played continuously, the tempo and key of the plurality of music pieces to be played have no relation to each other. Regardless of whether the tempo and tone of the song being played are the same, otherwise it is not possible to connect the currently playing song and the following song smoothly. was there.

The present invention has been made in view of the above-mentioned various problems of the prior art, and an object of the present invention is to smooth a plurality of songs when playing the plurality of songs. It is an object of the present invention to provide an automatic performance device that can be connected and played.

[0006]

In order to achieve the above object, an automatic performance device according to the present invention is provided with a storage means for storing performance data of a plurality of songs and a performance of the plurality of songs stored in the storage means. Reading means for simultaneously reading the performance data of the first music piece and the performance data of the second music piece from the data, and the performance of the first and second music pieces read by the reading means. Performance level control means for controlling the performance level of the data, wherein the performance level of the performance data of the first song is gradually decreased and at the same time the performance level of the performance data of the second song is gradually increased. And a control means.

Therefore, the performance level control means gradually decreases the performance level of the two music pieces read by the reading means from the performance level of the first music piece, and at the same time, the second music piece
Since the playing level of the song is controlled to gradually increase, a crossfade effect is obtained when the first song and the second song are connected, and the connection between the first song and the second song is achieved. It becomes smooth.

Further, the automatic performance device according to the present invention stores the performance data of a plurality of songs, and the performance data of the plurality of songs stored in the storage means. A reading means for simultaneously or sequentially reading the performance data of the two pieces of music, and a tempo control means for matching the tempo of the second piece of music read by the reading means with the tempo of the first piece of music read by the reading means. And have.

Therefore, the tempo control means matches the tempo of the second music piece read by the reading means with the tempo of the first music piece read by the reading means, so that the first music piece and the second music piece Connection is smooth.

Further, the automatic musical performance apparatus according to the present invention includes storage means for storing performance data of a plurality of music pieces, and reading of performance data of the first music piece from the performance data of the plurality of music pieces stored in the storage means. A reading means for simultaneously or sequentially reading the performance data of the second piece of music, and a key control means for matching the key of the second piece of music read by the reading means with the key of the first piece of music read by the reading means. And has.

Therefore, since the key control means matches the key of the second music read by the reading means with the key of the first music read by the reading means, the first music and the second music are matched. Connection is smooth.

Further, these performance level control, tempo control, and key control can be performed in combination.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic performance device according to the present invention will be described in detail below with reference to the drawings. In the following description, in order to facilitate understanding, it is assumed that the automatic performance device according to the present invention handles MIDI data and performs automatic performance based on an internal clock obtained by dividing one beat into 120.

Normally, the main routine is repeatedly executed to monitor the operating state of each operator, which will be described later.
A 1 ms interrupt processing routine (FIGS. 4 to 6) is activated by a periodic signal that arrives every s (m seconds).
Executes the ms interrupt processing routine. In this 1 ms interrupt processing routine, the clocks advancing during that time are accumulated, and a process for producing an event at the position of the accumulated clock of the performance data or an overtaken event is performed.

As described above, one beat corresponds to the internal clock 12
For example, when the tempo is “quarter note = 100”, 100 beats / minute = 100 beats / (60 × 1000) ms 100 × 120 internal clock / 60000 = 0.2 clock / Ms, and the internal clock is set to "0.
2 ”in steps. This is called a step clock, and the tempo changes by increasing or decreasing the value of this step clock.

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

This automatic performance device is constructed so that the control of the entire operation thereof is controlled by using a central processing unit (CPU) 10. The CPU 10 stores, via the bus 12, a ROM 14 in which a predetermined program for executing the main routine and the 1 ms interrupt processing routine is stored, and performance data for automatic performance input from a floppy disk. And a random access memory (RAM) 16 as a working area in which a group of registers for storing various system variables necessary for execution of a program by the CPU 10 as described later are set, and the present invention described later. M via the MIDI output terminal 20 to the operation panel section 18 provided with various operating devices related to the implementation of the above and various display devices for displaying the setting states of the various operating devices, and the sound source 30 as an external device.
A floppy disk control for controlling a MIDI output device 22 for outputting performance data based on the IDI standard and a floppy disk device 24 for reading performance data from a floppy disk storing performance data for automatic performance. The device 26 is connected.

FIG. 2 (a) shows a data format of performance data handled by the present automatic performance device. However, the data format shown here is the data format for easy understanding of the present invention. Only events related to the implementation of the invention are formatted, and pronunciation information, tempo information, and key (key) information are set as events. Then, each event has time information until the next event occurs as a step time.

Here, the pronunciation information is composed of a pitch (pitch), a note length and a strength. The tempo information is a step clock indicating the number of clocks per 1 ms. Further, the key information includes information indicating the tonic of a key (C = 0, C sharp = 1, ...) And information indicating whether the key is a major key or a minor key (maj (major) = 0, m).
in (minor) = 1).

FIGS. 2B and 2C show the above-mentioned data
The performance data described in the format is shown. In the performance data shown in FIG. 2B, the tempo is “quarter note = 120 (0.24 clock / ms)”, and the key is “C major (Cmaj ) ”In the fourth octave,“ Do (C4) ”,“ Le (D4) ”,“ Mi (E4) ”,
It shows a song whose pitch rises as "Fa (F4)".

In the performance data shown in FIG. 2C, the tempo is "quarter note = 180 (0.36 clock / m.
s) ”, the key is“ G major ”(Gmaj), and the fourth octave is“ So (G4) ”,“ Fa (F Sharp 4) ”,“ Mi (E4) ”,“ Le (D4) ”. It shows that the pitch is decreasing.

FIG. 3 shows the external configuration of the operation panel section 18. As the operators and the display device related to the implementation of the present invention, which are provided in the operation panel section 18,
There are the following:

1. Designation of the first and second songs: song order selection switch 40, song selection switch 42, set switch 43, song number display section 44

First, the music order switch 40 is used to select the first music or the second music. Then, the song number of the desired song is selected by the song selection switch 42 composed of an up / down switch. At that time, the song number is displayed on the song number display portion 44. When the set switch 43 is pressed when the song number of the song to be selected is displayed in the song number display section 44, the performance data of the song of the song number displayed in the song number display section 44 is changed to the song order switch 40. Is set as the music (first music or second music) of the rank selected by.

2. Items related to mode setting: 2nd song auto start mode on / off switch 4
6, 2nd track auto start start measure number display device 4
8, 2nd song synchronization mode on / off switch 50, 2
Track key matching mode on / off switch 52, 2
Song tempo matching mode on / off switch 54,
2nd song crossfade mode on / off switch 56, 2nd song crossfade time display device 58, numeric keypad 60

3. Regarding start / stop of performance ...
First song start switch 62, second song start switch 64, stop switch 66

The above-mentioned second song auto start mode ON / OFF switch 46, second song synchronization mode ON / OFF switch 50, and second song key setting mode
The on / off switch 52, the second song tempo matching mode on / off switch 54, and the second song crossfade mode on / off switch 56 are the first song start switch 62 or the second song start switch. It can be individually set on / off before pressing 64.

Of the above switches, the second song auto
When the start mode on / off switch 46 is turned on, use the numeric keypad 6 to specify the measure in the first song from which measure the second song will automatically start.
Use 0 to set the measure number (auto start start measure number) of the first song at the position where you want the second song to start playing automatically. The measure number set in this way is
The second track automatic start is displayed on the bar number display device 48.

When the second song crossfade mode on / off switch 56 is turned on, the numeric keypad 60 is used to set the crossfade time (the time interval for performing the crossfade, that is, the start of the crossfade). To the end of the crossfade.) In ms. The crossfade time (unit of ms) set in this way is displayed on the second music crossfade time display device 58.

Then, when the first song start switch 62 is pressed, the performance of the song set as the first song is started. At this time, when the second song auto start mode on / off switch 46 is on, the performance of the first song is the second song auto set by the ten keys 60.
When the bar with the bar number displayed on the start start bar number display device 48 is reached, the performance of the second piece of music is automatically started. When the performance of the second music is automatically started, if the second music synchronization mode on / off switch 50 is on, the performance of the second music is started in synchronization with each beat.

On the other hand, the second song auto start mode
When the on / off switch 46 is off, by pressing the second song start switch 64, the playing of the song set as the second song can be started at any time during the performance of the first song. In this way, even when the second song start switch 64 is pressed to start playing the second song, if the second song synchronization mode on / off switch 50 is on, synchronization is applied in beat units and the second song is synchronized. The performance starts.

When the crossfade mode on / off switch 56 for the second song is off, the performance of the second song is started and the performance of the first song is stopped at the same time.

On the other hand, when the crossfade mode on / off switch 56 of the second music piece is on, the volume of the second music piece is crescendo from "0" and becomes the original volume of the second music piece. At the same time, the volume of the performance of the first song is decrescendo from the original volume and becomes “0”. Then, the time required for such a change between "0" and the original volume is set using the ten keys 60 as the crossfade time and displayed on the second song crossfade time display device 58.

When the crossfade time elapses and the volume of the performance of the first song becomes "0", the performance of the first song is stopped.

When the second key combination mode on / off switch 52 is ON, the second music performance is 2
The original key (key) of the original song is transposed to the key (key) of the first song. In the description of the present embodiment, for easy understanding, only the transposition relating to the tonic of the key is dealt with, and the transposition from the major to the minor or the minor to the major is not dealt with.

On the other hand, when the second music key setting mode on / off switch 52 is off, the above-mentioned transposition is not performed.

The second song tempo matching mode is turned on /
When the off switch 54 is on, the second performance is
The tempo of the first song is used instead of the original original tempo of the second song.

On the other hand, the second song tempo matching mode is ON /
When the off switch 54 is off, the performance of the second song is
It will be performed at the original tempo of the second song.

When the stop switch 66 is pressed, all the performances being performed at that point are stopped.

Further, in the RAM 16, registers and flags for storing system variables as described below are set. In the following description, the contents (data, etc.) of each register and the like are represented by the same label name unless otherwise specified.

(1) s It is a song number indicating whether it is the first song (song) or the second song (song), and is "0 = 1 song" and "1 = 2 song".

(2) XfadeMode Indicates whether or not crossfading is in progress, and "0 = no crossfading" and "1 = crossfading" are set.

(3) XfadeCnt This is a down counter that indicates the remaining crossfade time.

(4) Status [] Shows the performance state of each song: "0 = stopped", "1 = playing", and "2 = waiting for synchronization".

(5) CurClock [] Indicates the current time of each song (steps the clock with the beginning of each song as "0").

(6) PlyClock [] Indicates the time of the next event of each song.

(7) Step [] Indicates the amount of clock progress of each song and corresponds to the tempo.

(8) MajMin [] The key of each song is shown as "0 = Maj (major)",
“1 = Min (minor)”.

(9) Scale [] Indicates the tonic key of each song, where "0 = C" and "1 = C"
"Sharp" ...

In the above-mentioned configuration, the 1 ms interrupt processing routine will be described with reference to the flow charts shown in FIGS.

The periodic interrupt every 1 ms for activating this 1 ms interrupt processing routine is activated as follows.

That is, when the first song start switch 62 is pressed, CurClo is processed as a process in the main routine.
ck [0] is cleared, and tempo information (clock step amount) which is the first event of the performance data of the first music is read and set in Step [0], and MajMin is set.
The following key information is read and set in [0] and Scale [0], and PlyClock is set.
The time of the next event is set in [0], and the Status
After s [0] is set to "1", a periodic interrupt is activated every 1 ms, which activates a 1 ms interrupt processing routine. Then, the actual performance processing of the first music piece is performed by a 1 ms interrupt processing routine.

When the 1 ms interrupt processing routine is started in this way, first in step S402, "Xfa
If "deMode = 1", XfadeCnt is counted down, and the process proceeds to step S404.

In step S404, "Status
It is determined whether or not [1] ≠ 1 ”. That is, it is determined whether Status [1] indicating the status of the second song is set to a value other than “1 = playing”.

The result of the determination in step S404 is negative (N), that is, "1 = playing" in Status [1].
If is set, the process proceeds to step S406, and “s” is set to “0”.

When the process of step S406 is completed, the process proceeds to step S408, and Status [s] (“s = 0” when the process of step S408 is performed subsequently from step S406) is set to “1”. It is determined whether or not is set.

The result of the determination in step S408 is negative, that is, "0 = stopping performance" or "2 = waiting for synchronization" is set in Status [s], and performance based on performance data is performed. If not,
It proceeds to step S410.

In step S410, s is incremented by "1" and the process proceeds to step S412.

In step S412, it is determined whether s is less than "2". If the determination result in step S412 is affirmative (Y), s is less than "2", that is, s is "1". (S is “1” in the immediately preceding step S410.
"1" or "2" because it is incremented
Takes the value of. ), The process returns to step S408, and the subsequent processes are repeated (“s = 1” when the processes of steps S412 to S408 are performed in this way).

The above-mentioned steps S408 and S
By the processing of 410 and step S412, it is possible to know whether the first piece of music is playing or the second piece of music is playing.

If the determination result of step S412 is negative, that is, s is "2" or more, the process proceeds to step S414.

In step S414, XfadeMod
"1" is set in e and XfadeCnt
Is counted down to "0".

The determination result of step S414 is affirmative, that is, "1" is set in XfadeMode,
If XfadeCnt is counted down to "0", the process proceeds to step S416 and XfadeCnt is counted.
Set "0" to Mode.

When the process of step S416 is completed, the process proceeds to step S418, where Status [0] is set to "0" to indicate that the first song is stopped, and then the first song is finished. The execution of this 1 ms interrupt processing routine is completed.

On the other hand, when the result of the determination in step S414 is negative, that is, when XfadeMode is set to "1" and XfadeCnt is not counted down to "0", the subsequent processing is performed. Instead, the execution of the 1 ms interrupt processing routine ends.

If the result of the determination in step S404 is affirmative, that is, if "Status [1] ≠ 1", the process proceeds to step S420. At this time, the performance of the second song has not started.

In step S420, it is determined whether or not "2 = waiting for synchronization" is set in Status [1] indicating the state of the second song.

If the determination result of step S420 is negative, that is, if "0 = stopped playing" is set in Status [1], the process proceeds to step S422.

In step S422, the second song auto start mode on / off switch 46 is turned on, the auto start mode is on, and Cur is set.
If Clock [0] is larger than the time (auto start time) indicated by the bar number of the second song auto start, "2" is set in Status [1].

When the processing of step S422 is completed, the routine proceeds to step S424, where the second music auto start mode on / off switch 46 is turned off,
The start mode is OFF and the second song starts.
If the switch 64 is turned on, the Status
Set “2” to [1].

When the processing in step S424 is completed, the flow advances to step S426 to determine whether Status [1] is set to "2".

If the result of the determination in step S426 is negative, that is, if "2" is not set in Status [1], the performance of the second song is not started and step S is performed.
Jump to 406.

On the other hand, if the result of the determination at step S426 is affirmative, that is, if Status [1] is set to "2", then the processing advances to step S428, at which the second music synchronization mode on / off switch 50 is turned on. Then, it is determined whether or not the second music synchronization mode is ON.

If the determination result of step S428 is affirmative, that is, if the second music synchronization mode on / off switch 50 is on, the process proceeds to step S430 and Cur
Step from the remainder obtained by dividing Clock [0] by 120
It is determined whether [0] is larger. That is, it is determined whether or not the timing of the current time of the first music due to the clock step is the timing next to the timing of the beat of the first music.

If the determination result of step S430 is negative, that is, if the timing of the current time of the first music is not the timing next to the timing of the beat of the first music, the performance of the second music is not started because of the waiting for synchronization. Step S406
Jump to.

On the other hand, if the result of the determination in step S430 is affirmative, that is, if the timing of the current time of the first music is the timing next to the timing of the beat of the first music, the performance of the second music is started. , At this time, step S
Proceed to 432 and set CurClo [1] to CurClo
Set the remainder value of ck [0] divided by 120 and set 2
Adjust the time of the song.

When the process of step S432 is completed, the process proceeds to step S434. Also, when the determination result of step S428 is negative, that is, when the second music synchronization mode on / off switch 50 is off, step S43.
Jump to 4.

At step S434, the key information and tempo information of the performance data of the second music piece are read out, and MajMi is read.
The values of n [1], Scale [1], and Step [1] are set, respectively. Further, the time of the next event is set in PlyClock [1].

When the process of step S434 is completed, the process proceeds to step S436, the second music synchronization mode on / off switch 50 is turned off, and the second music synchronization mode is turned off.
If so, then CurClock [1] is set to "0".

When the process of step S456 is completed, the process proceeds to step S438, and if the second music tempo matching mode on / off switch 54 is turned on and the tempo matching mode is on, the value of Step [0] is changed to Step.
Set to [1]. In this way, preparations are made to perform the performance of the second song at the same tempo as the tempo of the first song.

When the process of step S438 is completed, the process proceeds to step S440, in which the second song crossfade mode on / off switch 56 is turned on, and if the crossfade mode is on, "1" is set to XfadeMode. Set it, and press the numeric keypad 60 on XfadeCnt
Use to set the specified crossfade time. In this way, preparations are made to crossfade the first and second songs.

When the process of step S440 is completed, the process proceeds to step S442, and if the second song crossfade mode on / off switch 56 is turned off and the crossfade mode is off, then Status [0].
Set "0" to and stop playing the first song immediately.

When the process of step S442 is completed, the process proceeds to step S444, the status [1] is set to "1" to start the performance of the second tune, and the process proceeds to step S406.

If the determination result of step S408 is affirmative, that is, if "1 = playing" is set in Status [s], the process proceeds to step S446.

In step S446, CurClock
CurClock is obtained by adding Step [s] to [s].
Update [s].

Upon completion of the processing in step S446, the flow advances to step S448 to set CurClock [s] to Pl.
It is determined whether or not yClock [s] or more.

The determination result of step S448 is negative, that is, CurClock [s] is PlyClock [s].
If less, jump to step S410.

On the other hand, the determination result of step S448 is affirmative, that is, CurClock [s] is PlyClock.
If [s] or more, the process proceeds to step S450 and P
The event of lyClock [s] is transferred to a predetermined buffer of the RAM 16.

When the process of step S450 is completed, the process proceeds to step S452, "s = 1", the second music key matching mode on / off switch 52 is turned on, and the key matching mode is on. And MajMi
If n [0] and MajMin [1] match, Scale [0] is added to the note number (note #) indicating the pitch of the event transferred to the buffer, and Scale [1] is further subtracted. To do.

When the process of step S452 is completed, the process proceeds to step S454, and it is determined whether or not "1" is set in XfadeMode.

If the determination result of step S454 is affirmative, that is, if XfadeMode is set to "1", the process proceeds to steps S456 to S460 to perform crossfade processing.

First, in step S456, it is determined whether or not s is set to "0".

If the determination result of step S456 is affirmative, that is, if "0" is set in s, step S456
Proceeding to 458, the decrescendo of the first song is processed.

That is, in step S458, the volume (Volume) of the event transferred to the buffer is
It is updated by the calculation result of “Volume × (XfadeCnt / crossfade time)”. When the process of step S458 ends, the process proceeds to step S462.

On the other hand, if the decision result in the step S456 is negative, that is, if s is set to "1", the process advances to a step S460 to process the crescendo of the second music.

That is, in step S460, the volume of the event transferred to the buffer is set to "Volume ×
It is updated by the calculation result of {(crossfade time-XfadeCnt) / crossfade time} ".
When the process of step S460 is completed, the process proceeds to step S462.

If the determination result of step S454 is negative, that is, if "0" is set in XfadeMode, the process directly proceeds to step S462.

In step S462, step S450.
The event of the performance data that has been transferred to the buffer at is transmitted to the sound source 30 via the MIDI output device 20 and the MIDI output terminal 22. Then, the sound source 30 that has received the event performs necessary processing according to the received event, and the performance of the first song or the second song is performed based on the event.

When the process of step S462 is completed, the process proceeds to step S464, and it is determined whether or not there is the next data.

If the determination result of step S464 is affirmative, that is, if there is the next data, the process proceeds to step S466, PlyClock [s] is advanced to the next data, the process returns to step S448, and the above process is repeated.

On the other hand, if the result of the determination in step S464 is negative, that is, if there is no next data, step S46.
8, the status [s] is set to "0" to stop the performance (Play), and the process proceeds to step S410.

That is, the above-mentioned processing is performed in the 1 ms interrupt processing routine, and the second music auto start mode on / off switch 4 is used.
When 6 is on, the process for automatically starting the performance of the second music when the first music reaches the bar indicated by the bar number set by the ten keys 60 is step S4.
22 and step S428.

The processing for starting the performance of the second music by pressing the second music start switch 64 is performed in steps S424 and S428.

In addition, the second song synchronization mode is turned on / off.
When the switch 50 is turned on, the process of starting the performance in synchronization with each beat is performed in step S428.

Furthermore, when the second song crossfade mode on / off switch 56 is on, the crossfade processing for applying the crossfade effect is as follows.
This is performed in steps S456 to S460.

When the second music key matching mode on / off switch 52 is on, the second music performance is set to 2
The processing for transposing from the original original key of the song to the first key and playing is performed in step S452.

Further, when the second song tempo matching mode on / off switch 54 is on, the process for playing the second song at the tempo of the first song instead of the original original tempo of the second song is performed. Step S438
Done in.

Then, when the stop switch 66 is pressed, Status [0] and Status [0] are immediately returned.
"0" is set in [1], and all performances are immediately stopped.

The above embodiment may be modified as follows.

(1) In the above embodiment, when the crossfade process is performed, the volume of the first music piece is reduced from the original volume to "0", and
The crossfade effect was obtained by increasing the volume of the second song from "0" to the original volume. However, at this time, the volume of the first song does not have to be reduced to "0", and the volume of the second song does not have to start from "0".

That is, if the second song is like a jingle, the volume of the first song is slightly reduced and treated like BGM (background music), and an announcement is interrupted when the second song starts. It is possible to obtain the effect as it was possible. At this time, the performance of the second song may be performed with the original volume from the beginning.

(2) In the above embodiment, only the volume is dealt with in the crossfade processing, but the tempo may be crossfaded. In other words, when the original tempo of the first song and the original tempo of the second song are different, the tempo of the first song is gradually approached to the tempo of the second song, and at the same time, the tempo of the second song started is the first song. Start from the tempo and gradually approach the original tempo. In this way, the tempo of the first song changes smoothly to the tempo of the second song, and the first song and the second song can be smoothly connected. The first song may be muted gradually at the crossfade time, or may be muted at the time when the crossfade time has passed without gradually muting.

The above-described tempo crossfade can be realized by the following processing, for example.

That is, in the automatic performance device shown in the above-mentioned embodiment, the tempo information is expressed as the number of clocks that advance in 1 ms, and in the 1 ms interrupt processing routine generated every 1 ms, It is controlled by adding this to the time (total number of clocks).

Therefore, the crossfade of the tempo, for example, the crossfade time is "1000 ms",
The original tempo of the first song is "0.24 clock / m
s ”and the original tempo of the 2nd song is“ 0.36 clock / ms ”, the 1st and 2nd songs that are being played at the same time in the 1000 times of 1ms interrupt processing that occurs during the crossfade time. The tempo of "0.2
4012 clocks / ms → 0.24024 clocks / m
s → ... → 0.35988 clocks / ms ”in order to add to the total number of clocks.

In the crossfade of such tempo, unlike the above process, the tempo of the first song is gradually muted at the crossfade time without changing, and only the second song starts from the tempo of the first song. Even if the original tempo is gradually approached, the first music and the second music can be smoothly connected.

(3) In the above-described embodiment, the second song auto start mode on / off switch 46 is used.
When you turn on and automatically start playing the second song,
Although the performance start position of the second music in the first music is set in units of measures, it is needless to say that it may be set in units of beats or clocks.

(4) In the above-mentioned embodiment, when the performance of the second music is started, the second music synchronization mode is turned on / off.
When the switch 50 is turned on, the second music starts playing in synchronization with the first music in beat units, but may be synchronized in bar units.

(5) In the above embodiment, only the relationship between the first and second songs has been described for ease of understanding, but in the same manner as above, two or more songs are changed to the third song, Of course, they may be sequentially handled as the fourth song.

[0120]

Since the present invention is configured as described above, when playing a plurality of songs, the first to second songs are performed.
By changing the volume, tempo, key, etc. instantly or gradually at the time of transition to the tune, it is possible to smoothly connect and play.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic performance device according to the present invention.

FIG. 2 shows a data format of performance data according to the present invention, (a) is an explanatory diagram schematically showing the data format, and (b) is a performance created by the data format shown in (a). Here is an example of data
(C) shows another example of the performance data created by the data format shown in (a).

FIG. 3 is an explanatory diagram of an external configuration of an operation panel unit.

FIG. 4 is a flowchart showing a 1 ms interrupt processing routine.

FIG. 5 is a flowchart showing a 1 ms interrupt processing routine.

FIG. 6 is a flowchart showing a 1 ms interrupt processing routine.

[Explanation of symbols]

 10 CPU 12 Bus 14 ROM 16 RAM 18 Operation Panel 20 MIDI Output Device 22 MIDI Output Terminal 24 Floppy Disk Device 26 Floppy Disk Control Device 30 Sound Source

Claims (3)

[Claims] 1. Storage means for storing performance data of a plurality of songs, and reading of performance data of a first song and read of performance data of a second song from performance data of the plurality of songs stored in the storage means. And a first music piece and a second music piece read by the reading means.
Performance level control means for controlling the performance level of the performance data of the second piece of music while decreasing the performance level of the performance data of the first piece of music at the same time. An automatic performance device having a performance level control means for gradually increasing the performance. 2. Storage means for storing performance data of a plurality of songs; reading performance data of a first song and reading performance data of a second song from performance data of a plurality of songs stored in the storage means. And a tempo control unit for matching the tempo of the second song read by the reading unit with the tempo of the first song read by the reading unit. Automatic playing device. 3. Storage means for storing performance data of a plurality of songs, and reading of performance data of a first song and read of performance data of a second song from the performance data of the plurality of songs stored in the storage means. And a key control unit for matching the key of the second music read by the reading unit with the key of the first music read by the reading unit. Automatic playing device.