JP3873178B2 - Automatic accompaniment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic accompaniment apparatus suitable for use in an electronic musical instrument or the like.
[0002]
[Prior art]
Conventionally, various accompaniment patterns composed of data representing the pitch of each sound to be played, sounding timing, etc. are stored in various memories, and the accompaniment pattern selected from these is synchronized with the set playback tempo. There is known an automatic accompaniment apparatus that sequentially reads out and automatically reproduces accompaniment sounds.
[0003]
[Problems to be solved by the invention]
By the way, in the conventional automatic accompaniment apparatus, depending on the content of the accompaniment pattern to be reproduced, if the reproduction tempo is increased, the number of musical sounds that are simultaneously generated increases accordingly. In some cases, the previously generated musical sound is forcibly released and assigned a new pronunciation, but doing so causes a sense of incongruity and musical unnaturalness, such as a lack of pronunciation. There is a problem that.
Therefore, the present invention has been made in view of such circumstances, and an automatic accompaniment apparatus capable of performing automatic accompaniment without causing a sense of incongruity or musical unnaturalness even when the playback tempo is increased. The purpose is to provide.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, accompaniment patterns of timbres assigned to a plurality of simultaneously-soundable sound generation tracks are stored, and these accompaniment patterns are read out in synchronization with the playback tempo. In the automatic accompaniment device that reproduces from each sound generation track, coefficient generating means for generating a correction coefficient corresponding to the reproduction tempo, and the musical sound reproduced on the sound generation track to which the specific tone is assigned, Reproduction control means for correcting a sound generation time according to a correction coefficient generated by the coefficient generation means for a musical sound reproduced on a sound generation track to which a sound other than a specific tone color is assigned is provided.
[0005]
According to a second aspect of the present invention, which is dependent on the first aspect, the coefficient generating means generates a correction coefficient that decreases as the playback tempo increases, and further, According to the invention described in Item 3, the reproduction control means shortens the sound generation time of the musical sound reproduced on the sound generation track to which a sound other than the specific tone is assigned according to the correction coefficient generated by the coefficient generation means. It is a feature.
[0006]
According to the fourth aspect of the present invention, accompaniment patterns of timbres assigned to a plurality of simultaneously-soundable sound generation tracks are stored, and these accompaniment patterns are read out in synchronization with the playback tempo and are read from each sound generation track. In the automatic accompaniment apparatus for reproduction, coefficient generation means for generating a correction coefficient corresponding to the reproduction tempo for each tone color, and each of the reproduction tracks respectively reproduced with reference to the correction coefficient generated by the coefficient generation means And a reproduction control means for individually correcting the tone generation time of the tone color tone.
[0007]
In the present invention, a musical sound reproduced on a sound generation track to which a specific tone is assigned is sounded as it is, whereas a musical sound reproduced on a sound generation track to which a sound other than the specific tone is assigned is corrected in accordance with the reproduction tempo. To correct the pronunciation time. Therefore, for sounds that do not produce an auditory discomfort or musical unnaturalness even if the pronunciation time is shortened, the pronunciation time is shortened and corrected according to the playback tempo to avoid a shortage of simultaneous pronunciation tracks. In order to avoid shortening corrections for sounds that produce an auditory discomfort or musical unnaturalness when the playback time is shortened, an auditory discomfort or musical unnaturalness may occur even if the playback tempo is increased. It becomes possible to accompaniment automatically without making it.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The automatic accompaniment apparatus according to the present invention can be applied not only to a known electronic musical instrument but also to a DTM apparatus using a personal computer. Hereinafter, an automatic accompaniment apparatus according to an embodiment of the present invention will be described as an example with reference to the drawings.
[0009]
A. First embodiment
(1) Overall configuration
FIG. 1 is a block diagram showing the overall configuration of a first embodiment according to the present invention. In this figure, 1 is a panel switch composed of various switches arranged on the console panel, and generates an event corresponding to each switch operation. This event is captured by a key scan of the CPU 3 described later. The panel switch 1 is equipped with a power switch (not shown) and a pattern selection switch for selecting an accompaniment pattern, as well as a start / stop switch 1a for instructing the start / stop of automatic accompaniment and the playback tempo. There is an UP switch 1b / DOWN switch 1c for setting the tempo / slow tempo.
[0010]
2 includes an LCD panel 2a (not shown) disposed on the console panel described above, and a display driver 2b (not shown) that controls the display of the LCD panel 2a in accordance with a display control signal supplied from the CPU 3. It is a display unit, and displays on the screen an operation state corresponding to the operation of the panel switch 1. The CPU 3 executes various control programs stored in the ROM 4 and controls each part of the device in accordance with each switch operation (switch event) of the panel switch 1 captured by key scanning. Will be described in detail later.
[0011]
The ROM 4 stores various control programs loaded into the CPU 3, and stores a correction table TABLE (TEMP) and various factory preset accompaniment patterns.
As shown in FIG. 2, the correction table TABLE (TEMP) is a table for reading a correction coefficient corresponding to the reproduction tempo TEMP. The correction coefficient read out from this table is used when correcting the sound generation time in a reproduction process described later. Used for. The accompaniment pattern stored in the ROM 4 is provided for each tone color (instrument sound), and each note is expressed by an event interval ΔT and an event EVENT by a known relative time method. In the present embodiment, since automatic accompaniment by a rhythm instrument sound is assumed, the event EVENT represents a sound generation time.
[0012]
Reference numeral 5 denotes a RAM that temporarily stores various register / flag data used for processing by the CPU 3. Reference numeral 6 denotes a tempo clock generation circuit for generating a tempo clock TMP for designating the reproduction tempo TEMP at the time of automatic accompaniment under the control of the CPU 3, and the reproduction tempo TEMP generated by this circuit 6 is the above-described UP switch 1b or DOWN switch. It is variably controlled according to the operation of 1c.
Reference numeral 7 denotes a sound source configured by a known waveform memory reading method. The sound source 7 has, for example, five sound generation tracks (sound generation channels) that can be sounded simultaneously, and “pedal hi-hat”, “high tom”, “mid tom”, “low tom”, and “floor tom” that are assigned to each sound generation track. Are sequentially read out from the ROM 4 in synchronism with the reproduction tempo TEMP, and a musical tone having a specified rhythm tone color is formed on each tone generation track. Reference numeral 8 denotes a sound system in which a musical tone signal output from the sound source 7 is D / A converted and then amplified and sounded as a musical tone from the speaker SP.
[0013]
(2) Operation
Next, the operation of the first embodiment will be described with reference to FIGS. In the following, after describing the overall operation first, the characteristic operation related to the gist of the present invention will be described.
(1) Main routine operation (overall operation)
First, when the power is turned on in the present embodiment, the CPU 3 loads a predetermined control program from the ROM 4 and executes the main routine shown in FIG. 3, advances the process to step SA1, and stores various registers / programs stored in the RAM 5. Resets flags and initializes to set initial values. Next, in step SA2, processing corresponding to the operation of various switches arranged on the console panel, for example, processing corresponding to the operation of the start / stop switch 1a instructing start / stop of automatic accompaniment, and the playback tempo are increased. Processing corresponding to the operation of the UP switch 1b / DOWN switch 1c set to tempo / slow tempo is executed.
[0014]
When the switch process is completed, the CPU 3 advances the process to step SA3, and performs a reproduction process in which accompaniment patterns stored in the ROM 4 are sequentially read and reproduced in accordance with the set reproduction tempo TEMP. In this playback process, the shortage of the sound generation time is corrected by referring to the correction table TABLE (TEMP) described above to avoid the shortage of the number of simultaneously sounding tracks that occurs when the playback tempo TEMP is increased. The timbre is characterized in that the pronunciation time is not shortened and corrected.
[0015]
In other words, if the sound generation time is shortened and corrected as the playback tempo TEMP becomes faster, the shortage of simultaneous sound generation tracks can be avoided, which eliminates the possibility of running out of sound. It is also possible to emphasize the sense of incongruity and musical unnaturalness. For this reason, in the first embodiment, for a tone color that does not cause a sense of incongruity or musical unnaturalness even if the sound generation time is shortened, the sound generation time is shortened and corrected according to the playback tempo TEMP to On the other hand, the timbres that cause a sense of incongruity and musical unnaturalness when the pronunciation time is shortened are not shortened and corrected.
[0016]
After the reproduction process related to the gist of the present invention is performed, the CPU 3 advances the process to step SA4, for example, reselects the accompaniment pattern designated for change by the switch process described above, or changes the tone color. Execute other processing such as. Thereafter, the automatic accompaniment is advanced by repeating steps SA2 to SA4 until the power is set to the off state.
[0017]
(2) Timer interrupt processing routine operation
Next, the operation of the timer interrupt processing routine for controlling the event progress timing will be described with reference to FIG. The CPU 3 executes timer interrupt processing at predetermined intervals corresponding to the set reproduction tempo TEMP, proceeds to step SB1, and resets the sound generation track number n stored in the register n to zero. Next, in step SB2, the value stored in the register TIME (n) in the switch process (see FIG. 5) described later, that is, the event interval ΔT of the accompaniment pattern assigned to the sounding track number n is decremented by 1, and continues. In step SB3, it is determined whether or not the sound generation flag stored in the register ONF (n) is “1”, that is, whether or not the sound generation track number n is being sounded.
[0018]
If the sound is muted, the determination result is “NO”, the process proceeds to step SB5, and the sounding track number n stored in the register n is incremented by 1 while the sounding track number n is sounding. The determination result is “YES”, the process proceeds to the next step SB4, the sounding time stored in a register ONTIME (n) described later is decremented by 1, and then the process proceeds to step SB5 to increment the sounding track number n by 1. To advance.
Thereafter, the process proceeds to step SB6, and it is determined whether or not the value of the register n is “5” or more, that is, whether or not the event progress timing has been controlled for all sound generation tracks. If the timing control has not been completed, the determination result is “NO”, and the process returns to step SB 2 again to control the event progress timing for the next sounding track number n + 1. However, the timing control is performed for all sounding tracks. When finished, once complete this routine.
[0019]
(3) Operation of switch processing routine
Next, the operation of the switch processing routine will be described with reference to FIG. When this routine is executed through step SA2 of the main routine (see FIG. 3) described above, the CPU 3 proceeds to step SC1 shown in FIG. 5 and determines whether or not the start / stop switch 1a is turned on. To do.
Here, for example, when the start / stop switch 1a is turned on, the determination result is “YES”, the process proceeds to step SC2, and the start flag STF stored in the register STF is bit-inverted. The start flag STF represents an automatic accompaniment start when “1”, and an automatic accompaniment stop when “0”. In other words, since the start / stop switch 1a is a switch for alternately instructing automatic accompaniment start and automatic accompaniment stop each time it is turned on, the start flag STF is bit-inverted every time it is turned on.
[0020]
(B) Operation at the start of automatic accompaniment
For example, when the bit-inverted start flag STF is “1”, that is, when an automatic accompaniment start is instructed, the determination result in step SC3 is “YES”, and the process proceeds to step SC4. In step SC4, the CPU 3 resets the sound generation track number n stored in the register n to zero, and in the subsequent step SC5, the event interval ΔT stored in the register TRACK (n) (0) is stored in the register TIME (n). Store.
The register TRACK (n) is a two-dimensional array register that temporarily stores the accompaniment pattern read from the ROM 4 in correspondence with the sound generation track number n. The register TRACK (n) (0) This refers to the event interval ΔT corresponding to the head address (0) of the accompaniment pattern assigned to track number n.
[0021]
Subsequently, when proceeding to step SC6, the sounding track number n is incremented by 1 and stepped, and at step SC7, whether or not the stepped sounding track number n is “5” or more, that is, the event for all sounding tracks. It is determined whether or not the interval ΔT has been read. If the reading has not been completed, the determination result is “NO”, the process returns to step SC5, and the reading operation of the event interval ΔT is repeated.
When the event interval ΔT has been read for all sound generation tracks, the determination result in step SC7 is “YES”, the process proceeds to step SC8, the timer interrupt prohibition is canceled, and this routine is completed. As a result, the above-described timer interrupt processing routine (see FIG. 4) is executed, and the event progress timing is controlled.
[0022]
(B) Operation when automatic accompaniment is stopped
On the other hand, when the start flag STF bit-inverted by the ON operation of the start / stop switch 1a becomes “0” and an automatic accompaniment stop is instructed, the determination result in step SC3 becomes “NO”, and the process proceeds to step SC9. To proceed. In step SC9, the sound source 7 is instructed to mute all sound generation tracks. Thereafter, the process proceeds to step SC10, where an interrupt mask is set to prohibit timer interrupt processing.
[0023]
(C) Operation when adjusting playback tempo
Next, the operation when adjusting the playback tempo will be described. When the UP switch 1b or the DOWN switch 1c is operated to adjust the reproduction tempo TEMP, the determination result in the above-described step SC1 is “NO”, and step SC11 and subsequent steps are executed.
When the UP switch 1b is operated so that the playback tempo TEMP is set to the uptempo, the determination result in step SC11 is “YES”, the process proceeds to the next step SC12, and the playback tempo value stored in the register TEMP is incremented by 1. And step forward.
On the other hand, when the DOWN switch 1c is operated to set the playback tempo TEMP to the slow tempo, the determination result in step SC13 is “YES”, the process proceeds to step SC14, and the playback tempo value stored in the register TEMP is decremented by 1. .
[0024]
(4) Operation of playback processing routine
Next, the operation of the reproduction processing routine will be described with reference to FIG. When this routine is executed through step SA3 of the main routine (see FIG. 3) described above, the CPU 3 proceeds to step SD1 shown in FIG. 6 and determines whether the start flag STF stored in the register STF is “1”. It is determined whether or not automatic accompaniment has started. If the automatic accompaniment has not started, the determination result is “NO”, and this routine is completed without performing any processing. Otherwise, the determination result is “YES”, and the process proceeds to the next step SD2. .
In step SD2, the sounding track number n stored in the register n is reset to zero, and in the subsequent step SD3, whether or not the event interval ΔT stored in the register TIME (n) corresponding to the sounding track number n is “0”. That is, it is determined whether it is under the event timing.
[0025]
(B) Under event timing
If it is under the event timing, the determination result in step SD3 is “YES”, the process proceeds to step SD4 to increment the address of the register TRACK (n), and this step is incremented in the subsequent step SD5. The event EVENT is read from the register TRACK (n) according to the address, and the sound generation time as the content of the event EVENT is set in the register ONTIME (n), while the tone color name assigned to the register TRACK (n) is set in the register TONE. Set to (n). Thereafter, the process proceeds to step SD6 to determine whether or not the timbre name set in the register TONE (n) matches the specific timbre.
[0026]
Here, if a specific tone color is assigned to the tone generation track number n, the determination result is “NO”, and the process proceeds to step SD9, which will be described later, but if it is not a specific tone, the determination result is “YES”, and the next step The process proceeds to SD7, and with reference to the correction table TABLE (TEMP) shown in FIG. 2, the correction coefficient corresponding to the currently set reproduction tempo TEMP is read and stored in the register HOSEI (n).
Next, in step SD8, the corrected sound generation time obtained by multiplying the correction coefficient stored in the register HOSEI (n) and the sound generation time stored in the register ONTIME (n) is stored again in the register ONTIME (n). Thus, when the sound generation time is corrected for the sound generation track to which a sound color other than the specific sound color is assigned, the CPU 3 advances the process to step SD9 and sets the sound generation flag stored in the register ONF (n) to “1”.
[0027]
Thereafter, the process proceeds to step SD10 to instruct the sound source 7 to sound the sound generation track number n. As a result, the sound source 7 causes the tone color rhythm instrument sound set in the register TONE (n) to be generated with the sound generation time (or corrected sound generation time) set in the register ONTIME (n). After such a sound generation instruction, the CPU 3 advances the process to step SD11 to increment the address of the register TRACK (n), and in step SD12, the next event from the register TRACK (n) according to the incremented address. The interval ΔT is read and stored in the register TIME (n).
Next, when proceeding to step SD13, the CPU 3 increments the sounding track number n by one, and in step SD14, it is determined whether or not the sounding track number n incremented is “5” or more, that is, all sounding tracks. It is determined whether or not the reproduction processing has been completed for the. Here, if the process is not completed, the determination result is “NO”, the process returns to step SD3, and the reproduction process is advanced for the next sounding track.
[0028]
(B) When not under event timing
In this case, the determination result in step SD3 is “NO”, the process proceeds to step SD15, and whether or not the sound generation flag stored in the register ONF (n) is “1”, that is, the sound generation track number n is sounded. Determine if it is in the middle.
Here, if the sound is being generated, the determination result is “YES”, and the process proceeds to the next step SD16 to determine whether the value of the register ONTIME is “0”, that is, whether the sound is muted. If the sound is not muted, the determination result here is “NO”, and the process proceeds to step SD13 described above.
On the other hand, when the sound is muted, the determination result in step SD16 is “YES”, the sound generation flag stored in the register ONF (n) is set to “0”, and the sound source 7 is sounded in the subsequent step SD18. After instructing to mute track number n, the process proceeds to step SD13 described above.
[0029]
As described above, in the reproduction processing routine, for a musical tone having a tone that does not cause a sense of incongruity or musical unnaturalness even if the sound generation time is shortened, the sound generation time is shortened and corrected according to the reproduction tempo TEMP. While eliminating the shortage of simultaneous sounding tracks, shortening the pronunciation time is not corrected to shorten the pronunciation time for musical sounds of specific tones that cause auditory discomfort and musical unnaturalness. This makes it possible to perform automatic accompaniment without causing auditory discomfort or musical unnaturalness.
[0030]
B. Second embodiment
Next, the second embodiment will be described. Since the configuration of the second embodiment is the same as that of the first embodiment described above, the description thereof is omitted. The second embodiment is different from the first embodiment described above in that the first embodiment has a correction table for musical tones of specific tones that produce an uncomfortable feeling of audibility and musical unnaturalness when the pronunciation time is shortened. While the tone generation time is not corrected with reference to TABLE, the second embodiment is provided with a correction table TABLE for each tone color, and each tone color according to the playback tempo TEMP with reference to these correction tables TABLE. It is to correct the pronunciation time. The operation of the reproduction processing routine according to the second embodiment having such features will be described below with reference to FIG.
[0031]
Similar to the first embodiment described above, when the reproduction processing routine according to the second embodiment is executed via step SA3 of the main routine (see FIG. 3), the CPU 3 proceeds to step SE1 shown in FIG. It is determined whether the flag STF is “1”, that is, whether automatic accompaniment is started. If the automatic accompaniment has not started, the determination result is “NO”, and this routine is completed without performing any processing. Otherwise, the determination result is “YES”, and the process proceeds to the next step SE2. .
In step SE2, the sound generation track number n stored in the register n is reset to zero. In the subsequent step SE3, whether or not the event interval ΔT stored in the register TIME (n) corresponding to the sound generation track number n is “0”. That is, it is determined whether it is under the event timing.
[0032]
(B) When it is under event timing
In this case, the determination result in step SE3 is “YES”, the process proceeds to step SE4 to increment the address of the register TRACK (n), and in step SE5, the register TRACK is incremented according to the incremented address. The event EVENT is read from (n), and the sound generation time, which is the content of the read event EVENT, is set in the register ONTIME (n), while the timbre name assigned to the register TRACK (n) is stored in the register TONE (n). set.
[0033]
Next, when proceeding to step SE6, the two-dimensional correction table TABLE (TONE (n), TEMP) is referred to, and a correction coefficient corresponding to the tone name assigned to the sounding track number n and the currently set reproduction tempo TEMP. Is stored in the register HOSEI (n). In step SE8, the corrected sound generation time obtained by multiplying the correction coefficient stored in the register HOSEI (n) and the sound generation time stored in the register ONTIME (n) is stored again in the register ONTIME (n). When the tone generation time correction corresponding to the playback tempo TEMP is made for the tone tone assigned to the tone generation track number n, the CPU 3 advances the process to step SE8 and sets the tone generation flag stored in the register ONF (n) to “ Set to 1 ”.
[0034]
Thereafter, the process proceeds to step SE9 to instruct the sound source 7 to generate the sound generation track number n. As a result, the sound source 7 causes the tone color rhythm instrument sound set in the register TONE (n) to sound with the corrected sound generation time set in the register ONTIME (n). After the sound generation instruction, the CPU 3 advances the process to step SE10, increments the address of the register TRACK (n) and increments it, and in the subsequent step SE12, the next event interval from the register TRACK (n) according to the incremented address. ΔT is read and stored in the register TIME (n).
Next, in step SE13, the sounding track number n is incremented by 1 and stepped, and in the next step SE14, whether or not the stepped sounding track number n is “5” or more, that is, the playback process is completed for all sounding tracks. Determine if you did. If the process is not completed, the determination result is “NO”, the process returns to step SE3, and the reproduction process is advanced for the next sounding track.
[0035]
(B) When not under event timing
In this case, the determination result in step SE3 is “NO”, the process proceeds to step SE14, and whether or not the sounding flag stored in the register ONF (n) is “1”, that is, the sounding track number n is sounded. Determine if it is in the middle.
If the sound is being generated, the determination result is “YES”, and the process proceeds to the next step SE15 to determine whether the value of the register ONTIME is “0”, that is, whether the sound is muted. If the sound is not muted, the determination result here is “NO”, and the process proceeds to step SE12 described above.
On the other hand, when the sound is muted, the determination result in step SE15 is “YES”, the process proceeds to step SE16 and the sound generation flag stored in the register ONF (n) is set to “0”. 7 is instructed to mute the sound generation track number n, and then the process proceeds to step SE12.
[0036]
As described above, in the second embodiment, the tone generation time for each tone color is corrected according to the reproduction tempo TEMP with reference to the two-dimensional correction table TABLE (TONE (n), TEMP). If the correction table contents associated with timbres that produce a sense of discomfort or musical unnaturalness are set so that the pronunciation time is not shortened and corrected, a coefficient is set so that even if the playback tempo is increased, it is audible. Automatic accompaniment can be achieved without causing discomfort and musical unnaturalness.
[0037]
In the first and second embodiments described above, in the aspect of automatically accompaniment of the rhythm instrument sound, the auditory sound generated when the playback tempo is increased by changing the tone generation time varying with the playback tempo for each tone color. This is not limited to this, but it can also be applied to other instrument sounds (tones), and it can be combined to change the pronunciation time according to the pitch and volume. It is also effective.
For example, when auto-accompaniment (or automatic performance) of a certain piece of music, if the playback tempo is increased and the number of simultaneously sounding tracks is inevitably insufficient in time, a musical sound with a certain volume or less or a predetermined pitch or less For example, it is possible to avoid the sense of incongruity and musical unnaturalness while eliminating the shortage of simultaneous sounding tracks by shortening the sounding time. Moreover, it is good also as an aspect which changes the pronunciation time about the musical sound of the part which does not produce an auditory discomfort and musical unnaturalness among several parts which form the music to perform an accompaniment (or automatic performance).
[0038]
【The invention's effect】
According to the first aspect of the present invention, the musical sound reproduced on the sound generation track to which the specific tone is assigned is sounded as it is, while the musical sound reproduced on the sound generation track to which a sound other than the specific tone is assigned is reproduced. Since the sound duration is corrected according to the correction coefficient corresponding to the playback tempo, for sounds that do not cause a sense of incongruity or musical unnaturalness even if the duration is shortened, the sound duration is shortened and corrected according to the playback tempo. This reduces the number of tracks that can be played at the same time, and shortens the pronunciation time so that auditory discomfort and musical unnaturalness will not be shortened. Automatic accompaniment can be achieved without causing a sense of incongruity or musical unnaturalness.
According to the second and third aspects of the invention, the sound generation time of the musical sound played back on the sound generation track to which a sound other than the specific tone is assigned is shortened according to the correction coefficient that decreases as the playback tempo increases. The shortage of simultaneous sounding tracks can be solved.
According to the fourth aspect of the present invention, the correction coefficient corresponding to the reproduction tempo is generated for each tone color, and the tone of each tone reproduced on each tone generation track is referred to with reference to the correction coefficient for each tone color. The tone duration is adjusted individually, so for sounds that do not cause a sense of incongruity or musical unnaturalness even if the tone duration is shortened, the tone duration is corrected according to the playback tempo and the number of simultaneous tone tracks On the other hand, as a result of avoiding shortening and correcting the tone that causes a sense of incongruity and musical unnaturalness when the pronunciation time is shortened, even if the playback tempo is increased, Automatic accompaniment can be achieved without causing discomfort and musical unnaturalness.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an overall configuration of a first embodiment according to the present invention.
FIG. 2 is a diagram for explaining the contents of a correction table TABLE (TEMP).
FIG. 3 is a flowchart showing an operation of a main routine.
FIG. 4 is a flowchart showing the operation of a timer interrupt processing routine.
FIG. 5 is a flowchart showing an operation of a switch processing routine.
FIG. 6 is a flowchart showing an operation of a reproduction processing routine.
FIG. 7 is a flowchart showing the operation of a reproduction processing routine according to the second embodiment.
[Explanation of symbols]
1 Panel switch
2 display section
3 CPU (coefficient generation means, reproduction control means)
4 ROM (coefficient generation means)
5 RAM
6 Tempo clock generator
7 Sound source
8 Sound system

Claims (4)

In an automatic accompaniment device that stores accompaniment patterns of timbres assigned to a plurality of simultaneously-soundable sound generation tracks, reads out the accompaniment patterns in synchronization with the playback tempo, and plays them from each sound generation track.
Coefficient generating means for generating a correction coefficient corresponding to the reproduction tempo;
Musical sounds that are played on the sounding track to which the specific tone is assigned are sounded as they are, while musical sounds that are played on the sounding track that is assigned to a sound other than the specific tone are pronounced according to the correction coefficient generated by the coefficient generating means. An automatic accompaniment apparatus comprising: a reproduction control means for correcting time. 2. The automatic accompaniment apparatus according to claim 1, wherein the coefficient generating means generates a correction coefficient that decreases as the reproduction tempo increases. 2. The automatic accompaniment according to claim 1, wherein the reproduction control means shortens the sound generation time of a musical sound reproduced on a sound generation track to which a sound other than a specific tone is assigned according to a correction coefficient generated by the coefficient generation means. apparatus. In an automatic accompaniment device that stores accompaniment patterns of timbres assigned to a plurality of simultaneously-soundable sound generation tracks, reads out the accompaniment patterns in synchronization with the playback tempo, and plays them from each sound generation track.
Coefficient generating means for generating a correction coefficient corresponding to the reproduction tempo for each tone color;
An automatic accompaniment apparatus, comprising: a reproduction control means for individually correcting the sound generation time of each tone color reproduced on each sound generation track with reference to the correction coefficient generated by the coefficient generation means .

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