JPH10124047A - Playing data editor and medium storing playing data edition program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change meters and to set inter-irregular meter sections in the case playing data is recorded by dividing playing data strings by each measure, inserting meter event data in mid-way of music, storing the playing data strings as they are even if the meters are changed and reexecuting the division of the measures. SOLUTION: The recorded playing data strings are divided by each measure in accordance with the initially recorded 4/4 meter event data. When the fresh 3/4 meter event data is written in the position of the mid-way (a) of the music or when the content of the meter event data is changed, the division of every measure after this measure is invalidated and the data is again divided to each measure in accordance with this fresh 3/4 meter event data. As a result, the reexecution of the division of the measures is made possible in accordance with the fresh meter while storing the playing data strings as they are. The easy changing of the meters and setting of the inter-irregular meter sections in the case where the playing data is recorded by real time playing are thus made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a performance data editing apparatus for easily adjusting the time signature when performance data recorded in real time includes a time signature.

[0002]

2. Description of the Related Art There are a step recording method and a real-time recording method as methods for recording performance data for automatic performance. The step recording method is a method in which note event data, setting event data, and the like for generating musical sounds are recorded one by one using a mouse, a personal computer keyboard, or the like. The real-time recording method is a method in which a performance keyboard or the like is actually played and the contents of the performance are recorded in real time. A device that records performance data first writes time signature event data,
The recorded data sequence is automatically divided into measures (measure line data is inserted for each measure).

[0003] By the way, some tunes do not have the same time signature throughout the tune. For example, there are songs whose beats change in the middle and songs whose beats differ only in some sections.
When recording such a song, if the step recording method is used, new time signature event data is written at a location where the time signature changes, and the subsequent performance data sequence is divided into bars based on the new time signature. Can be. However, when recording using the real-time recording method, the performer cannot interrupt the performance and input the time signature event data even at the place where the time signature changes, so that the performance can be continued with the changed time signature. Become. For this reason, in the recorded performance data, the tune and the time signature, that is, the actual bar and the bar divided on the data, do not match after the point where the time signature has changed.

In such a case, editing such as changing the time signature by inserting new time signature data after real-time recording is required. However, conventional devices often cannot change the time signature once recorded. Even if the time signature can be changed, even if the time signature is changed from four to three, the note event data of the fourth beat (the last one) of each bar is deleted. When the time signature is changed from three to four, the relative position of the note event data included in each bar relative to the bar line, such as adding one beat (the fourth beat) at the end of each bar, is moved. Instead, only the time signature was changed.

[0005]

The method of changing only the time signature without moving the relative position of the note event data contained in each bar with respect to the bar line as described above is suitable for the step recording system, but is real-time recording. When editing the time signature in a system, contrary to the performer's intention,
Necessary note event data was deleted or unnecessary beats were added, so that there was a disadvantage that editing could not be performed as desired.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a performance data editing apparatus which facilitates time signature adjustment when a performance data string including a variable time signature is recorded in real time.

[0007]

According to a first aspect of the present invention, there is provided a storage means for storing a performance data string including a time signature event data for designating the number of beats in one bar, and based on the time signature event data. Measure line calculating means for calculating a division point for each measure of the performance data sequence, and time signature changing means for writing new meter event data in the middle of the performance data sequence or changing the content of the meter event data in the performance data sequence And writing the new time signature event data or changing the content of the time signature event data according to the writing of the new time signature event data by the time signature changing means. Invalidate the division point of the new time signature event data Characterized in that and a re-calculating means for calculating the division points for each.

According to a second aspect of the present invention, there is provided a storage means for storing a performance data string including a time signature event data for designating the number of beats in one measure, and for each measure of the performance data string based on the time signature event data. Bar calculation means for calculating a division point of the time signature, time signature changing means for writing new time signature event data in the middle of the performance data sequence or changing the content of the time signature event data in the performance data sequence, In accordance with the writing of new time signature event data or the change of the content of the time signature event data, the next time signature event data is written after the bar in which the new time signature event data is written or the content of the time signature event data is changed. Invalidate the division point for each measure in the change section up to the measure and set the new time signature event data or There a re calculating means for calculating a division point for each re-measure, based on the modified time signature event data,
It is characterized by having.

In the invention according to claim 3 of the present application, the recalculating means is configured so that the time of the changed section is expanded or contracted by the change of the beat by the new beat event data or the beat event data whose contents have been changed. It is characterized by including a means for moving subsequent time signature event data.

The invention according to claim 4 of the present application is a step of calculating, based on the time signature event data, a division point for each measure of the performance data string including the time signature event data designating the number of beats in one measure, After the bar where the new time signature event data is written or the content of the time signature event data is changed in accordance with the writing of new time signature event data in the middle of the data sequence or the change of the content of the time signature event data in the performance data sequence Invalidating the division point for each measure and calculating the division point for each measure again based on the new time signature event data or the changed time signature event data. It is characterized by.

According to a fifth aspect of the present invention, there is provided a procedure for calculating a division point for each measure of a performance data string including a time signature event data for designating the number of beats in one measure based on the time signature event data. After the bar where the new time signature event data is written or the content of the time signature event data is changed in accordance with the writing of new time signature event data in the middle of the data sequence or the change of the content of the time signature event data in the performance data sequence The division point for each measure in the change section up to the measure in which the next time signature event data is written is invalidated, and the division for each measure is again performed based on the new time signature event data or the time signature event data whose content has been changed. A performance data editing program having a procedure for calculating points is stored.

The invention according to claim 6 of the present application is arranged such that, in addition to the above procedure, the time of the changed section is expanded or contracted by the change of the beat by the new beat event data or the beat event data whose content has been changed. A procedure for moving subsequent time signature event data is stored as a performance data editing program.

According to a seventh aspect of the present invention, there is provided a storage means for storing a performance data sequence including time signature event data for designating the number of beats in one measure, and a new time signature event at a change point in the performance data sequence. By writing data or changing the content of the time signature event data existing at the change point, the time signature from the change point to the next time signature event data is changed from the old time signature to the new time signature event data or the content. Time signature changing means for changing to a new time signature indicated by the changed time signature event data, and searching for the time signature event data stored after the change point according to the change of the time signature by the time change means, and The number of bars from the change in time signature to the searched time signature event data and the time signature searched from the change in new time signature Characterized by comprising a time signature event moving means for moving the time signature event data number of measures and is the search to be equal to the vent, a.

The invention according to claim 8 of the present application is to write new time signature event data at a change point in the middle of a performance data string including time signature event data designating the number of beats in one measure or to exist at the change point. By changing the content of the time signature event data to be changed, the time signature from the change point to the next time signature event data is indicated by the new time signature event data or the time signature event data whose content has been changed from the previous time signature. A procedure for changing to a new time signature, and searching for the time signature event data stored after the change point in accordance with the change of the time signature, the number of bars from the change point in the old time signature to the searched time signature event data, and The searched time signature event such that the number of measures from the change point in the new time signature to the searched time signature event is equal. A step of moving the data, the storing performance data editing program having the features.

According to the first and fourth aspects of the present invention, the recorded performance data sequence is divided into bars based on the beat event data recorded first. Here, division does not actually separate the data by dividing it, but calculates the bar line position when inserting bar line data at the bar line position or calculating the bar line position when displaying performance data at the time of editing etc. This is the process of displaying. If new time signature event data is written in the middle of a song, or if the content of the time signature event data in the song is changed, the division of each measure after that measure is invalidated, and the new (or new) Are re-divided for each bar based on the time signature event data. This processing may be executed immediately when the time signature event data is written (when the content is changed), or may be executed during the above-described display. As a result, it is possible to redo the division of measures based on a new time signature while keeping the performance data string as it is, and when performance data is recorded by real-time performance,
It is possible to easily change the time signature and set a time signature section.

According to the second and fifth aspects of the present invention, when new time signature event data is written between a plurality of time signature event data in a performance data string in which a plurality of time signature event data are written, or When the content of the time signature event data in the middle is changed, the change section from the bar in which the new (or content is changed) is written to the bar in which the next time signature event data is written. With regard to, the division of each bar up to now is invalidated and the division of each bar is performed based on the new beat event data. This makes it possible to improve the efficiency, for example, when the time signature is set incorrectly or when the time signature event data of a measure that returns to the original time in the time signature section is input first, and the time signature event data of the measure that changes the time signature is input later. Editing becomes possible.

Further, according to the third and sixth aspects of the present invention, when the division of the change section is re-divided for each measure, the change section expands and contracts due to the change of the time signature (for example, the change section of 4 measures is changed from the 4 time signature). If it is changed to three beats, "(3-4) * 4)" will shorten the beat by four. ), The subsequent time signature event data is moved accordingly. Thus, even if the time signature in the middle of the music is changed, the subsequent time event data is automatically shifted to the correct position.

According to the seventh and eighth aspects of the present invention, when the time signature is changed from the old time signature to the new time signature by writing new time signature event data or changing the content of the time signature event data, the search is performed from the changed point. The number of measures up to the (next) beat event data is counted, and the searched beat event data is moved so that the number of measures is the same. As a result, even if the time signature is changed, the positional relationship between newly written or changed time signature event data and the subsequent time signature event data is always maintained correctly.

[0019]

FIG. 1 is a block diagram of an electronic musical instrument having an automatic performance function to which the present invention is applied. This electronic musical instrument can perform an automatic performance based on a performance data file (performance data string), and can record the performance data file in real time using the keyboard 20. The time signature of the performance data file recorded in real time can be changed at the time of editing.

In FIG. 1, a CPU 11 for controlling the overall operation of the electronic musical instrument has a ROM 11 and a RAM via a bus.
12, a timer 13, an external storage device 14, an external interface 17, a key press detection circuit 19, an operation detection circuit 21, a display circuit 23, a sound source circuit 24, and an effect circuit 25 are connected. The keyboard 20 is connected to the key press detection circuit 19. The switch group 22 and the mouse 15 are connected to the operation detection circuit 21. Also, as an external storage device,
Various devices such as a hard disk drive, a floppy disk drive, and an optical disk drive can be applied. Further, as the external interface 17, M
There are an IDI interface and a communication interface. A sound system 26 is connected to the effect circuit 25.

The ROM 11 stores a program for controlling the operation of the electronic musical instrument. A performance data string (performance data file) recorded in real time is stored in the RAM 12.
A performance data buffer for storing data, a time signature event register b (i), a bar number register n (i), and the like are set. The external storage device 14 has an area for storing a plurality of performance data files, and reads / writes the performance data files from / to the RAM 12.

The programs and performance data files shown in FIGS.
May be stored in any of the storage media described above, and when stored in the external storage device 14, the data is read into the RAM 12 and executed. In addition, a program or performance data file is fetched from an external electronic musical instrument, a computer, or the like via the interface 17, and is stored in the external storage device
2 may be stored. The timer 13 is a timer for controlling the tempo of the automatic performance, and the automatic performance proceeds by interruption from the timer.

The keyboard 20 has a key number of about 5 octaves (61 keys), and has a switch sensor for detecting on / off, key pressing speed, and pressing force after key pressing for each key. The ON / OFF and detected values of these switches and sensors are detected by the key press detection circuit 19 and input to the CPU 10. At the time of real-time recording, the performance contents of the keyboard 20 are written to the performance data buffer of the RAM 12 in real time. The switch group 22 includes a tone color selection switch, a shift key, and a cursor key. The mouse 15 has a mouse button, and has a function of moving a cursor displayed on the display circuit 23 and specifying an object specified by the cursor.

The tone generator 24 is a circuit for forming a tone signal based on tone data such as tone data and pitch data input from the CPU 10. The tone signal generated by the tone generator 24 is input to the effect circuit 25. The effect circuit 25 gives an effect such as reverb to the tone signal. The tone signal provided with the effect by the effect circuit 25 is input to the sound system 26. The sound system 26 converts the input digital tone signal into an analog signal, and then amplifies and emits the sound.

FIG. 2 is a diagram showing the structure of a performance data file (performance data string). The performance data is composed of note-on events and note-off events, and is composed of note event data indicating the contents of the performance, bar line data, time signature event data, and duration data indicating the time intervals of the generation timing of each event data and bar line data. I have. The measure data is based on the beat data indicated by the time signature event data so that the sum of the values of the duration data of the section sandwiched between one measure line data and the next measure line data becomes one measure. Inserted into the file. The duration data is, for example, four quarter notes.
It is represented by count value data counted as 80 counts. In this case, if the time is 4/4, one bar is 192.
It becomes 0 count. The beat event data is always paired with the bar line data, and can be inserted only at the bar line position during performance data editing. It is not necessary to write the time signature event data in all the bars. If the time signature event data is written in the bar for which the time signature is to be changed, the time signature is maintained until the bar in which new time signature event data is written.

FIG. 3 shows how bar line data is moved when time signature event data is inserted or when time signature event data already written is changed. FIG. 7A shows a state where the whole is written in 4/4 time signature. FIG. 7B shows a case where the performance data string in FIG. 7A is changed from a position a in the middle to 3/4 time signature. Even if the time signature is changed in the middle, the bar line is moved (newly set) without moving the event data. Such a change is made at the time of editing after the real-time recording when a song or the like whose time signature changes in the middle is recorded in real time. Also, FIG. 4C shows that the 4/4 time signature event data is written again in the middle of the performance data changed to 3/4 time.
An example of changing the time signature is shown. Such editing is performed, for example, in a case where a three-beat time signature section is provided in a four-beat music.

FIG. 3D shows that the event data of the 3/4 meter should be erroneously inserted at the position of the bar a in the performance data sequence of FIG. Here is an example of the case in which is written. Originally 4/4
Because the time signature was incorrectly entered as 4/4 time signature, the bar line has not been changed at all. Thereafter, as in the case of FIG. 9C, the player inserts time event data of 4/4 time at the position b (FIG. 10E). Can be inserted only at the position b, the device is automatically placed at the position b '.
Time event data of / 4 time is shifted.

Such a shift occurs due to an error in the content of the time signature event data to be inserted at the position a. However, by correcting the time signature event data at the position a to 3/4 time signature, the data shown in FIG. In this manner, the correct bar division as shown in FIG. In FIG. 10E, the interval from the position a to the position b 'where the next time signature event data is located is 3 bars, so that the time signature event data of a is 3
Even if the beat is corrected, the beat event data of the next 4/4 beat is written after three measures. As a result, the beat event data of the 4/4 beat moves to the correct b position. In this way, even if incorrect beat event data is set, it can be restored. In addition, the same figure (D), (E),
Not only when the time signature event data to be inserted is erroneously corrected as shown in (F) but also when the time signature event data is forgotten to be inserted and the time signature event is later inserted at the position a. Can be applied.

FIGS. 4 and 5 are flowcharts showing the operation of the electronic musical instrument. FIG. 6 is a diagram showing the procedure of bar line data deletion and insertion.

FIGS. 4 and 5 show an operation of inserting or changing beat event data in the edit mode. First, specify the first measure whose time signature is to be changed (s
1). Actually, the bar line at the beginning of the bar is specified. The bar event data may or may not be already written in this bar line. Then, new beat event data starting from this bar is input (s2). Then, 0 is set to a pointer i used when searching for beat event data from the performance data (s3). The time signature event data after the first measure for changing the time signature is searched (s5). The search is performed one measure at a time, and if found, the number of measures up to this time signature event data is set to n.
It is stored in (i) (s6). Then, the beat event data searched by adding 1 to i is stored in b (i) (s8). This operation is repeated until the song ends (s
9) The number of measures between each beat event data is counted. When the song ends, ff is set in the last bar number register n (i). ff is a value representing 255, which represents until the end of the music.

When the search operation is completed, first, s1
The time signature event data input at s2 is written to the bar of the bar specified by (s11), and the value of i is determined (s12). If i = 0, it indicates that there is no beat event data after the beat change (see FIG. 3A), so that the bar after the changed bar is searched and the bar line data thus far is deleted (s13). Then, new bar line data is inserted according to the changed time signature (s14). This is repeated until the end of the music is detected (s15).

A method of deleting and inserting bar line data will be described with reference to FIG. FIG. 11A shows an example of deleting bar line data. In the figure, ○ represents event data, | represents bar line data, and bow represents duration data, which are stored as performance data strings in order from the left. When the bar line data B is to be deleted, the bar line data B is deleted first, and the duration data D-1 and D-2 between the event data I-1 and I-2 before and after the bar line data B are deleted. Only one added duration data is written between I-1 and I-2 and corrected. That is, the data is reduced by two.

FIG. 3B shows a case where bar line data is inserted. When bar data is inserted between the event data I-3 and I-4, the duration data D between the event data I-3 and I-4 is divided into D-3 and D-4 according to the bar line position (two pieces of duration data are generated). Then, bar line data B is inserted in the meantime. That is, the data increases by two. Each measure line data is inserted into the performance data sequence so that the total value of the duration data existing between the immediately preceding measure line data and the present measure line data becomes a count value for one measure. .

On the other hand, when i> 0, the counter j is set to 0 (s20), and the section of b (j) is edited (s2).
1 to s23). First, the current bar line data existing after the current position is deleted (s21), and bar line data is inserted according to the time signature b (j) (s22). When the number of inserted bars reaches the number of bars stored in n (j), it is determined that the insertion of the bar line data for the number of bars of this time signature is completed (s23), and 1 is added to j ( s24). Then, the time signature event data b (j) is written at the beginning of the new section of b (j) (s25), and it is determined whether or not the number of measures n (j) in the section of j is ff (s2).
6). If not ff, return to s21 and repeat the same operation. If n (j) is ff, this is the last time signature event data, so the bar line data so far is deleted (s27), and bar line data is inserted according to the time signature b (j) (s28). This operation is repeated until the music ends (s29), and the operation ends.

With the above operation, it is possible to change only the time signature without moving the note event data. If there is time signature event data after the newly inserted (corrected) time signature event data, the subsequent time signature event data is written according to the number of measures before the insertion (correction), so that the time signature data is shifted and stored. Can be corrected to the correct position. In the above embodiment, the time signature event data at the position a is modified from four to three.
The position has been moved to the position of b from the front, but if the time is corrected to a time signature with a large number of beats, the position is moved backward and becomes the correct position.

In the above-described embodiment, an example has been described in which measure line data is inserted / deleted in a performance data file based on time signature event data. However, the present invention is also applicable to a performance data file having no measure line data. can do. That is, the bar lines may be generated only on the screen when the performance data is displayed in a format such as a staff when editing the performance data. In this case, when generating the display bitmap pattern, the bar timing is calculated based on the beat event data, and the bar bit pattern of the bar is inserted at a position corresponding to the timing. If the time signature is changed in the middle, the bar map pattern of the bar line is moved accordingly.

Further, according to the change of the beat event data, only the succeeding beat event data can be moved. The operation of the apparatus in this case will be described with reference to the flowcharts of FIGS. 7 to 9 and the movement example of FIG.

FIG. 7 shows the main operation of changing the time signature event. First, the user specifies beat event data whose beat is to be changed (s31). When specified, the content (time signature) of the specified time event data is temporarily stored (s32), and the content of the time event data is changed to the time specified by the user (s33). Then, the next meter event data is searched (s34), and if found, the amount of movement of the meter event data is calculated (s36: FIG. 8). It moves (s37: FIG. 9). After moving all subsequent time signature event data by this movement amount (s38, s39), the operation is terminated. In addition,
If the time signature event data moves backward, even if the result of moving the previous time signature event data is later than the time signature event data that has not yet moved, s
At 37, the beat event data after this overtaking is targeted for the next search.

FIG. 8 is a flowchart showing the movement amount calculating operation. First, a time ΔT1 (see FIG. 10) between the beat event data for which the change of the beat is designated and the beat event data found by the operation of s34 is calculated (s4).
1). This calculation is performed by accumulating all duration data Δt existing between both events. Then, based on the time Δt1 of one measure based on the pre-change time signature temporarily stored in s32, the measure number N of ΔT1 is obtained (s42). This can be obtained by “N = ΔT1 / Δt1”. Next, the time Δt of one measure based on the changed beat
The time ΔT2 up to the above-obtained number of measures when the measure is advanced in 2 is obtained (s43). This is expressed as “ΔT2 = N ×
Δt2 ”. Then, from ΔT2 to Δ
The movement amount ΔM of the beat event data is calculated by subtracting T1 (s44). In the above operation, the movement amount was obtained by calculating the time (ΔT2, ΔT1) for N measures, and then subtracting the time. However, the time difference (Δt2-
Δt1) may be obtained and multiplied by N to obtain the movement amount.

FIG. 9 is a flowchart showing the beat event moving process. Event data sandwiching the time moved by the movement amount ΔM from the position of the beat event data to be moved, that is, an event having a time larger than or the same as the event A (see FIG. 10, the same applies hereinafter) earlier than the movement destination time B is searched (s51). Then, the beat event data moved between the event A and the event B is inserted (s52). Then, the duration data (time from the immediately preceding event to this event) Δd of the moved beat event data is calculated and set (s53). This Δd is expressed as “Δd = (Δd of B)
− (ΔM− (position of B to Δd of original position of beat)) ”. Then, the duration data corresponding to the event B, which is the event data immediately after the moved beat event data, is corrected (s56).
This correction can be calculated by “Δd of B = (original Δd of B) − (Δd of beat event)”. Further, the duration data Δd of the beat event data following the original position of the moved beat event data is corrected (s5).
7). This is because the time signature event data has been omitted, so “Δd of the next event = Δd of the original next event +
Δd of the original time signature ”. After this,
The original time signature event data and the corresponding duration data are deleted (s58), and the operation ends.

FIG. 11 shows an example in which a performance data file is displayed in a staff notation. FIG. 7A shows an example in which all the beats are displayed in 4/4 time, and FIG. 7B shows an example in which only the middle four bars are changed to 3/4 time. As described above, the arrangement of the notes is not changed at all, and only the bar line is moved, so that the setting of the time-varying section at the time of real-time recording can be performed correctly.

Although the above embodiment has been described with reference to an electronic musical instrument having an automatic performance function, the present invention can also be realized in a form in which an application program is operated by a personal computer. In this case, the application program may be stored in a storage medium such as a magnetic disk, an optical disk, or a semiconductor memory and supplied to a main device such as a personal computer, or supplied from an external device via a network. You may.

The electronic musical instrument has a configuration in which a sound source device, an automatic performance device, and the like are integrally incorporated. However, each of the electronic musical instruments is configured as a separate device, and a communication means such as a MIDI interface or various networks is used. May be configured to connect the respective devices.

In the above embodiment, the note-on event and the note-off event are separately stored as the note data for controlling the tone on / off of the musical tone. However, the present invention is not limited to this. It may be described by a certain gate time GT. The format of the performance data is "event +
Any format such as “relative time”, “event + absolute time”, “pitch + note length”, and “solid method” may be used. Also,
The present invention can be applied not only to performance data recorded in real time but also to data in which beat event data is inserted or corrected in performance data recorded by a step recording method.

The automatic performance data may be of a plurality of channels (parts). At this time, a format in which data of a plurality of channels are mixed may be used, or a format in which data of each channel is separated for each track may be used.

The sound source circuit may be of any type such as a waveform memory system, an FM system, a physical model system, a harmonic synthesis system, a formant synthesis system, and an analog synthesizer system of VCO + VCF + VCA. Further, the tone generator circuit is not limited to the one configured using dedicated hardware, and may be configured using a DSP + microprogram, or may be configured as a software using a CPU + sound application program. A plurality of tone generation channels may be formed by using one circuit in a time-division manner, or a type in which one tone generation channel is constituted by one circuit may be used.

[0047]

As described above, according to the first and fourth aspects of the present invention, the recorded performance data sequence is divided into bars. Even if the time signature is changed by inserting time signature event data in the middle of a song (performance data sequence), the performance data sequence is saved as it is, and only the measure division is performed again. This makes it easy to change or set a time signature section.

According to the second and fifth aspects of the present invention, the performance data string is also preserved as it is for a change in the time signature of a partial section from the newly inserted / corrected time event data to the next time event data. By re-doing only the measure division, the time signature is incorrectly set, or the time signature event data of the measure in which the time signature returns to the original in the time signature section is input first, and the time signature event of the measure that becomes a time signature is changed. Efficient editing is possible, such as when data is input later.

Furthermore, according to the third and sixth aspects of the present invention, even if the change section is expanded or contracted by changing the time signature of the change section according to the above invention, the subsequent time signature event data is moved accordingly. By doing so, the subsequent time signature event data can always be written in the correct position.

According to the seventh and eighth aspects of the present invention, even when the time signature is changed from the old time signature to the new time signature by writing new time signature event data or changing the content of the time signature event data, each time signature is not changed. Since the number of measures between event data is always kept the same, the interval between time signature event data can always be kept correct even if the time signature is changed.

[Brief description of the drawings]

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

FIG. 2 shows an example of a performance data file used in the electronic musical instrument.

FIG. 3 is a diagram showing an example of inserting time signature event data in the performance data file;

FIG. 4 is a flowchart showing the operation of the electronic musical instrument.

FIG. 5 is a flowchart showing the operation of the electronic musical instrument.

FIG. 6 is a diagram showing a procedure of inserting and deleting beat event data in the electronic musical instrument.

FIG. 7 is a flowchart showing another operation example of the electronic musical instrument.

FIG. 8 is a flowchart showing another operation example of the electronic musical instrument.

FIG. 9 is a flowchart showing another operation example of the electronic musical instrument.

FIG. 10 is a diagram showing a movement example of the same time event data.

FIG. 11 is an exemplary view showing a display example of a performance data file in the electronic musical instrument.

[Explanation of symbols]

10 CPU, 11 ROM, 12 RAM, 15 mouse, 22 switch group, 23 display circuit

Claims (8)

[Claims] 1. A storage means for storing a performance data string including time signature event data for designating the number of beats in one measure, and a measure for calculating a division point for each measure of the performance data string based on the time signature event data. A line calculating means, a time signature changing means for writing new time signature event data in the middle of the performance data string, or changing the content of the time signature event data in the performance data string, and a new time signature event by the time signature changing means. In response to writing data or changing the content of the time signature event data,
The new beat event data or the beat event data whose content has been changed by disabling the division points for each bar after the bar in which the writing of the new beat event data or the content of the beat event data has been changed are invalidated. Re-calculating means for calculating a dividing point for each bar again. 2. A storage means for storing a performance data string including time signature event data for designating the number of beats per measure, and a measure for calculating a division point for each measure of the performance data string based on the time signature event data. A line calculating means, a time signature changing means for writing new time signature event data in the middle of the performance data string, or changing the content of the time signature event data in the performance data string, and a new time signature event by the time signature changing means. In response to writing data or changing the content of the time signature event data,
After the bar in which the new time signature event data is written or the content of the time signature event data is changed, the division point for each bar in a change section up to the bar in which the next time signature event data is written is invalidated and the new time signature event data is changed. Re-calculating means for calculating a division point for each bar again on the basis of accurate time event data or time event data whose contents have been changed. 3. The recalculation means moves subsequent time signature event data by the amount of time change of the change section due to a change in time signature according to the new time signature event data or the time signature event data whose content has been changed. 3. The performance data editing apparatus according to claim 2, further comprising means. 4. A procedure for calculating a division point for each measure of a performance data string including time signature event data specifying the number of beats in one measure based on the time signature event data; In accordance with the writing of the new time signature event data or the change of the content of the time signature event data in the performance data string, the division of each bar after the bar where the new time signature event data is written or the content of the time signature event data is changed A medium for storing a performance data editing program, comprising: a step of invalidating points and calculating again a division point for each bar based on the new time signature event data or the time signature event data whose content has been changed. 5. A procedure for calculating a division point for each measure of a performance data string including time signature event data for designating the number of beats in one measure based on the time signature event data; In response to the writing of the new time signature event data or the change of the content of the time signature event data in the performance data string, the new time signature event data is written or the content of the time signature event data is changed. Invalidating the division point for each measure in the change section up to the bar in which is written, and calculating the division point for each measure again based on the new time signature event data or the time signature event data whose content has been changed; and A medium storing a performance data editing program having: 6. In addition to the above procedure, the subsequent time signature event data is moved by an amount that the time of the change section is expanded or contracted by a change in the time signature according to the new time signature event data or the time signature event data whose content has been changed. 6. A medium storing the performance data editing program according to claim 5, wherein the procedure is stored as a performance data editing program. 7. A storage means for storing a performance data string including time signature event data for designating the number of beats in one measure; and writing new time signature event data at a change point in the middle of the performance data row; or By changing the content of the time signature event data at the change point,
Time change means for changing the time signature from the change point to the next time signature event data from the old time signature to the new time signature data indicated by the new time signature event data or the changed time signature event data; According to the change of the time signature by the time signature changing means, the time signature event data stored after the change point is searched, and the number of measures from the change point in the old time signature to the searched time signature event data and the new time signature are calculated. And a beat event moving means for moving the searched beat event data so that the number of measures from the change point in the above to the searched beat event becomes equal. 8. A new time signature event data is written at a change point in the middle of a performance data string including a time signature event data designating the number of beats per bar, or the content of the time signature event data existing at the change point. To change the time signature from the change point to the next time signature event data from the previous time signature to the new time signature event data or the new time signature indicated by the time signature event data whose content has been changed. In accordance with the change of the time signature, the time signature event data stored after the change point is searched for, and the number of measures from the change point in the old time signature to the searched time signature event data; Move the searched time signature event data so that the number of measures from the change point in the above to the searched time signature event becomes equal. Medium storing performance data editing program that has a procedure in which, the.