JP7781000B2 - Performance data conversion device and performance data conversion program - Google Patents

Description

The present invention relates to a performance data conversion device and a performance data conversion program.

Patent Document 1 describes an automatic performance device that automatically plays music data in response to external events. The music data is divided into predetermined sections. During automatic performance, the automatic performance device automatically plays the sections corresponding to the external events in response to the external events, and sets the tempo of the automatic performance based on the interval between the external events.

Japanese Patent Application Laid-Open No. 2003-15647

One method for creating and editing musical performance data for a piece of music is to create musical score data by looking at the score of the piece of music and pasting musical symbols such as notes onto a staff paper on a computer screen, or by using image recognition of the score, and then converting that musical score data into performance data.

When creating performance data in this way, in order to create rich, natural performance data with tempo and dynamic inflection, it is necessary to make full use of tempo and dynamic markings, as well as to delicately adjust the tempo speed and dynamic amount. This requires repeated trial and error between editing and playback, resulting in an extremely tedious, time-consuming, and inefficient process. Furthermore, even when the completed performance data is played back, it inevitably sounds unnatural to the ear. Moreover, the editing process of adding such inflection is too difficult for beginners. Even for those with musical talent, reflecting that talent in the performance data is a daunting task. What is needed is a method that allows anyone to more easily add inflection to performance data, following their instincts.

The object of this invention is to enable easy setting of tempo information or sound intensity for performance data.

The performance data conversion device has an input means for inputting timing information for each beat of first performance data based on operation by an operator, and a conversion means for converting the first performance data into second performance data based on the timing information for each beat, and the conversion means calculates tempo information for each beat of the second performance data based on the difference in the timing information between two adjacent beats, beat time information, and tempo information for each beat of the first performance data.

The performance data conversion device also has an input means for inputting the tone intensity of each beat of the first performance data based on the operation of an operator, and a conversion means for converting the first performance data into second performance data based on the tone intensity of each beat of the musical tones, and for determining the tone intensity of each beat of the second performance data, and when there are multiple musical tones within the same beat, the conversion means sets the tone intensities of the multiple musical tones within the same beat of the second performance data to the same tone intensity based on the tone intensity of each beat of the musical tones .

This invention makes it possible to easily set the tempo information or tone intensity of performance data.

FIG. 1 is a block diagram showing an example of the hardware configuration of a performance data conversion device. FIG. 2 is a block diagram showing an example of the functional configuration of the performance data conversion device. FIG. 3 is a diagram showing an example of a piano roll display. FIG. 4 shows an example of the beat information window. FIG. 5 is a diagram showing an example of performance data before conversion. FIG. 6 is a diagram showing an example of timing information and velocity input by tapping the tap area. FIG. 7 is a diagram showing an example of performance data after conversion.

Figure 1 is a block diagram showing an example of the hardware configuration of a performance data conversion device 100 according to this embodiment. The hardware of the performance data conversion device 100 is, for example, a general-purpose information processing device such as a tablet, smartphone, or personal computer.

The performance data conversion device 100 has a CPU 102, ROM 103, RAM 104, display device 105, touch panel 107, sound source unit 108, communication interface 109, VRAM 110, scan circuit 112, bus 113, sound system 114, and external device 115. The display device 105 is, for example, a liquid crystal display, and is connected to the bus 113 via VRAM 110. The touch panel 107 is provided on the display device 105, and is connected to the bus 113 via the scan circuit 112. Note that a mouse and keyboard may be provided instead of the touch panel 107.

The user can give instructions by touching the touch panel 107. The scan circuit 112 detects the position (coordinates) of the touch on the touch panel 107 and outputs a detection signal to the CPU 102 via the bus 113. The CPU 102 can detect touch operations, tap operations, double tap operations, etc. on the touch panel 107.

The external device 115 is, for example, an external storage device, an external computer, a printer, or a MIDI keyboard instrument. The external storage device is, for example, a hard disk, CD-ROM, MO disk, DVD, or memory card. The communication interface 109 is an interface connected to a communication network such as a USB, LAN, wireless communication network, the Internet, or a telephone line, or a MIDI network, and is connected to the external device 115. The performance data conversion device 100 can input performance data from the external device 115 via the communication interface 109 and display the performance data on the display device 105 via the VRAM 110.

The MIDI keyboard instrument is connected to the bus 113 via, for example, a Bluetooth or USB communication interface 109. The MIDI keyboard instrument outputs key press information and key release information in response to key press operations by the operator. The key press information includes the key number of the pressed key, the time of key press, and the key press strength.

The CPU 102 controls the entire performance data conversion device 100 by loading a program stored on the hard disk of the external device 115 onto the RAM 104 and executing the program loaded onto the RAM 104. The hard disk of the external device 115 stores the performance data conversion program executed by the CPU 102 and the performance data. The RAM 104 temporarily stores information used in processing by the CPU 102.

The display device 105 is, for example, a liquid crystal display. The display device 105 displays performance data, etc.

The sound source unit 108 includes software as a sound source and a DSP for adding effects, and generates sound signals for producing musical tones corresponding to the performance data. The sound source unit 108 outputs sound signals to the sound system 114 based on the performance data. The performance data includes tempo information, beat information, and multiple note data. The note data includes a note number, step time, gate time, and velocity. The note number is the pitch. The step time indicates the start time of sound production relative to the beginning of the song. The gate time is the duration of the sound production. The end time of sound production is the sum of the step time and gate time. The velocity is the strength of the sound production. Furthermore, when the metronome mode is set to on, the sound source unit 108 outputs a metronome sound signal based on the tempo information and beat information of the performance data to the sound system 114. The sound system 114 has a D/A converter, an amplifier, and a speaker, and can generate sounds corresponding to the performance data based on the sound signals generated by the sound source unit 108.

Figure 2 is a block diagram showing an example of the functional configuration of the performance data conversion device 100. The performance data conversion device 100 has an input unit 201, a conversion unit 202, a playback unit 203, and a display control unit 204. The performance data conversion device 100 realizes the functions of the input unit 201, conversion unit 202, playback unit 203, and display control unit 204 by the CPU 102 executing the performance data conversion program.

The performance data conversion device 100 generates musical score data by having the operator paste musical symbols such as notes onto staff paper on the screen of the performance data conversion device 100 or by performing image recognition on the musical score. The performance data conversion device 100 then converts the musical score data into performance data and records the performance data in the external storage device of the external device 115. This type of performance data tends to have monotonous tempo and dynamics. Therefore, the performance data conversion device 100 changes the tempo and dynamics in response to the operator's operations to create performance data that is rich in musical ideas and natural with modulations in tempo and dynamics. The method for doing this is explained below.

The CPU 102 selects a song in response to the operator's operation of the touch panel 107, reads the performance data corresponding to the selected song from the external storage device, sets the tempo and velocity (sound intensity) for each beat of the performance data based on the performance data, and displays the figures of each musical note in the performance data on the display device 105 as a piano roll as shown in Figure 3.

Figure 3 shows an example of a piano roll display according to this embodiment. The CPU 102 reads performance data stored in an external storage device and controls the display device 105 to display the piano roll shown in Figure 3 corresponding to that performance data.

In the piano roll of Figure 3, the horizontal direction of the display screen represents the time axis of the performance data, and the vertical direction of the display screen represents the pitch of the keyboard instrument. Each musical note in the performance data is represented by a rectangular shape. The left side of the rectangular shape of a musical note indicates the sound start time, and the right side indicates the sound end time. The playback position 301 of the performance data is the song pointer, indicated by a vertical line. In response to the operator's operation of the touch panel 107, the CPU 102 advances the elapsed playback time of the performance data and scrolls the rectangular shape of each musical note so that it moves from right to left. When the left side of the rectangular shape of a musical note passes the playback position 301, the musical note begins to be played. When the right side of the rectangular shape of a musical note passes the playback position 301, the musical note ends to be played. Performance data is played by tapping the playback start button 322 in Figure 3. Beat information 302 is displayed as the timing of each beat of the time signature of the performance data.

The touch panel 107 is provided on the display device 105, which displays the piano roll of FIG. 3. The operator can operate the touch panel 107 on the piano roll of FIG. 3. When a left-right swipe operation is performed on the touch panel 107, the CPU 102 scrolls the piano roll of FIG. 3 left-right. When a left-right pinch operation is performed on the touch panel 107, the CPU 102 zooms the piano roll of FIG. 3 in the time axis direction.

When the tap input mode button 311 in FIG. 3 is tapped, the CPU 102 displays the tap area 303 and inputs and sets timing information and velocity (sound intensity) based on the tap operation in the tap area 303. The CPU 102 inputs timing information for each beat of the performance data based on the tap timing in the tap area 303 and inputs the velocity based on the tap strength in the tap area 303. The stronger the tap, the greater the velocity. Here, tap strength also includes the tap speed (the time from tap on to tap off). Alternatively, the velocity may be input based on the tap position. For example, the higher the tap position in the tap area 303, the greater the velocity, and the lower the tap position in the tap area 303, the smaller the velocity. Alternatively, the magnitude of the velocity may be input by swiping (distance, direction, speed, etc.) or other differences in touch gestures. In short, the above is not a limitation as long as the magnitude of the velocity can be controlled by differences in touch operation. This allows the CPU 102 to input both the timing information for each beat of the performance data and the velocity of the musical notes for each beat based on a single tap operation by the operator.

When the tap input mode button 311 in FIG. 3 is not tapped, the CPU 102 inputs timing information and velocity (sound intensity) based on key depressions on the MIDI keyboard instrument. The CPU 102 inputs timing information for each beat of the performance data based on the key depression timing of the MIDI keyboard instrument, and inputs the velocity of the musical tone for each beat of the performance data based on the key depression speed or key depression strength of the MIDI keyboard instrument. This allows the CPU 102 to input both timing information for each beat of the performance data and the velocity of the musical tone for each beat based on a single key depression by the operator.

The following explanation uses tapping in the tap area 303 as an example, but the same applies when pressing keys on a MIDI keyboard instrument instead of tapping in the tap area 303. The operator inputs timing information and velocity at the timing corresponding to the beginning of each beat of the performance data, specifying the timing and velocity of each beat.

In real-time input mode, the CPU 102 starts playback of performance data with the first tap operation in the tap area 303, scrolls the piano roll shown in Figure 3 as the playback time passes, and inputs and sets timing information and velocity corresponding to the time of the playback position 301 in response to the tap operation in the tap area 303.

As the performance data is played, the rectangular shape of the musical sound and the beat information 302 are displayed scrolling from right to left. The display position of the playback position 301 is fixed. The operator taps the tap area 303 to specify the timing of each piece of beat information 302. In this case, the tap operation may be performed before the playback position 301 reaches the beat information 302, or after the playback position 301 reaches the beat information 302.

First, we will explain the playback method when a tap operation is performed before the playback position 301 reaches the beat information 302. The beat information 302 indicates the start time of the beat. If a tap operation is performed in the tap area 303 before the playback position 301 reaches the beat information 302, the CPU 102 skips the playback position 301 to the next beat information 302 and plays back the performance data.

Next, we will explain the playback method when a tap operation is performed after the playback position 301 reaches the beat information 302. When the playback position 301 reaches the beat information 302, if a tap operation has not yet been performed in the tap area 303 corresponding to that beat information 302, the CPU 102 stops playback of the performance data. If a tap operation is subsequently performed in the tap area 303 corresponding to that beat information 302, the CPU 102 resumes playback of the performance data.

In step input mode, the CPU 102 does not play back performance data, but instead scrolls the piano roll shown in Figure 3 based on the operator's swipe operation, and inputs a velocity corresponding to the time of the playback position 301 in response to a tap operation in the tap area 303.

In response to tap operations in the tap area 303, the CPU 102 inputs timing information and velocity at timings corresponding to the beginning of each beat of the music from the beginning to the end of the performance data.

You can use real-time input to tap in timing information and velocity while the performance data is automatically played back, or you can use step input to tap in velocity only while manually scrolling forward or backward in time.

The beat information 302 with the time closest to the playback position 301 becomes the selected beat information and is displayed in a different color from the other beat information 302. The CPU 102 outlines the rectangular shape 304 of the musical note whose sounding start time is closest to the playback position 301. The CPU 102 also displays a ● mark on the rectangular shape 304 of the musical note whose sounding start time is the same as the time of the selected beat information 302.

The CPU 102 can switch between beat information display on and beat information display off in response to a tap operation on the beat information display button 323 in FIG. 3. When the beat information display is on, the CPU 102 displays the beat information window in FIG. 4. When the beat information display is off, the CPU 102 does not display the beat information window in FIG. 4.

Figure 4 shows an example of the display of the beat information window. The CPU 102 displays the contents of the beat information 302 in the selected state of Figure 3 in the beat information window of Figure 4. Each piece of beat information 302 is information corresponding to each beat of the performance data, and includes tempo 401, velocity 402, and time signature 405. All beat information 302 from the beginning to the end of the performance data is automatically generated by the CPU 102 when the performance data is read. Incidentally, the playback speed 403 and metronome sound volume 404 in Figure 4 are playback-related settings unrelated to beat information, but are conveniently placed in the beat information window so that they can be quickly operated as needed.

Performance data has a tempo 401, a velocity 402, and a time signature 405. The tempo 401 and the time signature 405 are set, for example, at the beginning of the performance data and when they change. The velocity 402 is set for each note data within the performance data.

The selected information's beat information 302 is the beat information closest to the playback position 301 among the multiple pieces of beat information 302. When the playback position 301 moves relatively, the selected beat information is replaced with the beat information of the new selected information. Then, the display in the beat information window in Figure 4 is replaced with the newly selected beat information.

The beat information window in FIG. 4 displays the tempo 401, velocity 402, and time signature 405 contained in the selected beat information 302. If there are multiple velocities of note data in the beat corresponding to the beat information 302, the beat information window in FIG. 4 displays the velocity of the first note data among the multiple note data as velocity 402. In that case, the beat information window in FIG. 4 may display the average value of the velocities of the multiple note data as velocity 402.

The CPU 102 can change the tempo 401 and velocity 402 in the beat information window of Figure 4 in response to the operator's operation of the touch panel 107. If the tempo 401 and velocity 402 in the beat information window are changed, the changes are reflected directly in the converted tempo T2 and velocity V2 values described below.

Tempo 401 is, for example, 125 and can be changed by operating the slider, the + button, or the - button. Velocity 402 is, for example, 69 and can be changed by operating the slider, the + button, or the - button. Playback speed 403 can be changed by operating the slider. Metronome sound volume 404 can be changed by operating the slider. Time signature 405 is, for example, 3/4.

Figure 5 shows an example of performance data before conversion. The measure index indicates the measure number in 3/4 time. The beat index indicates the beat number within each measure in 3/4 time. The performance data in Figure 5 has a tempo T1 and a velocity V1 for each beat information 302. For example, all beat information 302 has a tempo T1 of 120 and a velocity V1 of 69.

Figure 6 shows an example of timing information t1 and velocity V2 input by tapping the tap area 303. The CPU 102 inputs timing information t1 and velocity V2 in response to the operator's tapping of the tap area 303. The tap index indicates the identification number of the tapping of the tap area 303 in Figure 3. The first tapping of the tap area 303 causes the CPU 102 to start playing back performance data. For that first tapping, the timing information t1 becomes 0.

After the timing information t1 and velocity V2 in FIG. 6 are input, when the conversion button in button 321 in FIG. 3 is tapped, the CPU 102 generates the converted tempo T2 and velocity V3 in FIG. 7 based on the pre-conversion tempo T1 in FIG. 5 and the timing information t1 and velocity V2 in FIG. 6.

Figure 7 shows an example of converted performance data. The tap index and timing information t1 in Figure 7 are the same as the tap index and timing information t1 in Figure 6, respectively. The converted performance data has a converted tempo T2 and a converted velocity V3 for each beat. Since the converted performance data has a tempo of 120 and a 3/4 time signature, the beat time t2 is the time equivalent to one quarter note beat, or in other words, 0.5 second intervals.

First, we will explain how to set the tempo T2. The CPU 102 calculates the converted tempo T2 for each beat based on the pre-conversion tempo T1 in Figure 5, the interval between beat time information t2, and the interval between timing information t1, as shown in the following equation (1). Beat time information t2 is the time for one beat, which in this example is the time for one quarter note beat (0.5 seconds). Of course, if the time signature or tempo changes, the beat time information t2 will not be a fixed value. For example, the following shows how to calculate the converted tempo T2 (= 150) for a beat with a tap index of "1".

T2 = T1 × (t2 interval) ÷ (t1 interval)
= 120 × (0.5 - 0) ÷ (0.4 - 0)
= 150 ... (1)

In other words, since the beat time interval was 0.5 seconds and the tap input interval was short at 0.4 seconds, the tempo of the next beat will be sped up to 150 and played back.

Furthermore, for example, the method for calculating the converted tempo T2 (=100) for a beat with a tap index of "3" is shown in the following formula:

T2 = T1 × (t2 interval) ÷ (t1 interval)
= 120 × (1.5 - 1.0) ÷ (1.5 - 0.9)
=100

In other words, since the beat time interval was 0.5 seconds and the tap input interval was 0.6 seconds, the tempo of the next beat was delayed to 100 for playback.

The above calculation method makes it impossible to calculate the converted tempo T2 for a beat with a tap index of "0." Therefore, the converted tempo T2 for a beat with a tap index of "0" is set to the same value as the converted tempo T2 for a beat with a tap index of "1." This method is not problematic, as it is generally unlikely that the tempo would change suddenly from the second beat. If the converted tempo T2 for a beat with a tap index of "0" were set to the pre-conversion value (= 120), this would result in unnatural performance data in which the tempo suddenly changes to 150 from the second beat, so this method is not appropriate.

As described above, the conversion unit 202 calculates tempo information T2 for each beat of the converted performance data based on the difference between the timing information t1 of two adjacent beats, the beat time information t2 of the converted performance data, and the tempo information T1 for each beat of the performance data before conversion.

Next, we will explain how to set velocity V3. The CPU 102 sets the velocity V2 of each beat in Figure 6 as the velocity V3 of each beat in Figure 7. The CPU 102 then sets the velocity V3 of each beat as the velocity of the musical tone (note data) within each beat.

Next, we will explain the case where multiple musical notes exist within the same beat. When multiple musical notes exist within the same beat, the CPU 102 sets the velocities of the multiple musical notes within the same beat in the converted performance data to the same velocity based on the velocity V2 of each beat. For example, if the velocity V2 of a certain beat is 71, the CPU 102 sets the velocities of all of the multiple musical notes within that beat to 71.

Furthermore, when there are multiple musical notes within the same beat, the CPU 102 may determine the velocities of the multiple musical notes within the same beat in the converted performance data based on the velocity V2 of each beat and the velocities of the multiple musical notes within the same beat in the performance data before conversion.

For example, when there are multiple musical notes within the same beat, the CPU 102 can determine the velocities of the multiple musical notes within the same beat in the converted performance data based on the ratio between the velocity V2 of each beat and the velocities of the multiple musical notes within the same beat in the performance data before conversion.

For example, consider the case where a first musical note and a second musical note exist within the same beat. In the performance data before conversion, the velocity of the first musical note is 100 and the velocity of the second musical note is 50. In this case, the ratio between the velocities of the first musical note and the second musical note is 100:50 = 1:0.5. The input velocity V2 is assumed to be 60. In this case, the velocity of the converted performance data is set based on the input velocity V2 and the above ratio. That is, in the converted performance data, the velocity of the first musical note is set to 60 x 1 = 60, and the velocity of the second musical note is set to 60 x 0.5 = 30.

As described above, by tapping the timing information t1 at the timing of the operator's own beat, rather than the beat of the performance data, the operator can change the tempo of the next beat to match the interval of the operator's own beat. The operator can also change the velocity of the musical tone depending on the position of the tap.

The input unit 201 inputs timing information t1 for each beat of the pre-conversion performance data based on the operator's operation. The conversion unit 202 converts the pre-conversion performance data of FIG. 5 into the post-conversion performance data of FIG. 7 based on the timing information t1 for each beat. The conversion unit 202 calculates tempo information T2 for each beat of the post-conversion performance data based on the timing information t1 for each beat and the tempo information T1 of the pre-conversion performance data.

The conversion unit 202 calculates tempo information T2 for each beat of the converted performance data based on the difference between the timing information t1 of two adjacent beats, the beat time information t2 of the converted performance data, and the tempo information T1 for each beat of the performance data before conversion, as shown in equation (1).

The playback unit 203 plays back the performance data before conversion. In real-time input mode, the input unit 201 inputs timing information t1 based on the time of playback position 301 and inputs the velocity V2 of the beat corresponding to playback position 301, while the playback unit 203 is playing back the performance data before conversion. In step input mode, the input unit 201 inputs the velocity V2 of the beat specified by the operator's operation, while the playback unit 203 is not playing back the performance data before conversion.

The display control unit 204 controls the display so that, along the time axis, rectangular shapes indicating the onset times of each musical note in the performance data before conversion and vertical line shapes indicating the times of each beat information 302 based on the beat information of the performance data before conversion are displayed, as shown in Figure 3.

The display control unit 204 controls the display to display the playback position 301 of the pre-conversion performance data. The input unit 201 inputs timing information t1 based on the displayed playback position 301 of the pre-conversion performance data, and inputs the velocity V2 of the beat corresponding to the displayed playback position 301 of the pre-conversion performance data. The input unit 201 inputs the timing information t1 based on a tap operation on the touch panel 107 or a key press operation on the keyboard.

If the input unit 201 inputs timing information t1 for a beat before the playback position 301 of the pre-conversion performance data reaches beat information (start of a beat) 302 of the pre-conversion performance data, the playback unit 203 skips the playback position 301 of the pre-conversion performance data to the next beat information (start of a beat) 302 and plays back the pre-conversion performance data.

Furthermore, when the playback position 301 of the pre-conversion performance data reaches the beat information (start of a beat) 302 of the pre-conversion performance data, if the timing information t1 of that beat has not yet been input by the input unit 201, the playback unit 203 stops playback of the pre-conversion performance data, and if the timing information t1 of that beat is subsequently input by the input unit 201, the playback unit 203 resumes playback of the pre-conversion performance data.

In this case, the longer the playback pause time, the slower the tempo of the next beat after conversion. If the tempo is too slow, the performance data will be converted into unnatural sounding data. To prevent this, a lower limit for the tempo can be set. If the calculated tempo falls below the lower limit, the tempo can be corrected to the lower limit, and then a blank period can be inserted before the next beat of the performance data to offset the tempo correction (i.e., the times of all musical notes from the next beat onwards are shifted back by that amount).

The input unit 201 inputs timing information t1 for each beat of the performance data before conversion and the velocity V2 for each beat based on the operator's operation. The velocity indicates the sound intensity of the musical tone. The conversion unit 202 determines the velocity of each musical tone in the converted performance data based on the velocity V2 for each beat.

The input unit 201 inputs both the timing information t1 for each beat of the performance data before conversion and the velocity V2 for each beat based on a single operation by the operator. The input unit 201 inputs the timing information t1 for each beat of the performance data before conversion based on the tap timing of the touch panel 107, and inputs the velocity V2 for each beat of the performance data before conversion based on differences in touch operations on the touch panel 107.

The input unit 201 may also input timing information t1 for each beat of the pre-conversion performance data based on the timing of key depression on the keyboard, and input velocity V2 for each beat of the pre-conversion performance data based on the key depression speed or key depression strength of the keyboard operation.

When there are multiple musical notes within the same beat, the conversion unit 202 sets the velocities of the multiple musical notes within the same beat in the converted performance data to the same velocity based on the velocity V2 of each beat.

Furthermore, when there are multiple musical notes within the same beat, the conversion unit 202 may determine the velocities of the multiple musical notes within the same beat in the converted performance data based on the velocity V2 of each beat and the velocities of the multiple musical notes within the same beat in the performance data before conversion.

For example, when there are multiple musical notes within the same beat, the conversion unit 202 can determine the velocities of the multiple musical notes within the same beat in the converted performance data based on the ratio between the velocity V2 of each beat and the velocities of the multiple musical notes within the same beat in the performance data before conversion.

As described above, according to this embodiment, the operator is no longer required to go through the tedious task of inputting tempo and dynamic symbols into the score or adjusting values. Furthermore, the operator can easily add inflection to monotonous performance data in accordance with their own sensibilities while listening to the performance of the music. Furthermore, the operator can easily generate performance data with a variety of different inflections from a single piece of performance data. Different operators will generate different performance data. Based on a single piece of performance data, it is possible to generate performance data with more different inflections than there are operators.

This embodiment can be realized by a computer executing a program. Furthermore, a computer-readable recording medium on which the above program is recorded, and a computer program product such as the above program, can also be applied as an embodiment of the present invention. Examples of recording media that can be used include flexible disks, hard disks, optical disks, magneto-optical disks, CD-ROMs, magnetic tapes, non-volatile memory cards, and ROMs.

The above embodiments are merely examples of specific embodiments of the present invention, and should not be construed as limiting the technical scope of the present invention. In other words, the present invention can be implemented in various forms without departing from its technical concept or main features.

201 Input unit 202 Conversion unit 203 Playback unit 204 Display control unit

Claims (14)

an input means for inputting timing information for each beat of the first performance data based on an operation by an operator;
a conversion means for converting the first performance data into second performance data based on the timing information of each beat,
the conversion means calculates tempo information for each beat of the second performance data based on a difference in timing information between two adjacent beats, beat time information, and tempo information for each beat of the first performance data. further comprising a reproducing means for reproducing the first performance data;
2. The performance data conversion device according to claim 1, wherein the input means inputs the timing information based on the time of a playback position while the first performance data is being played back by the playback means. 3. The performance data conversion device according to claim 1, wherein the input means inputs the timing information based on a tap operation on a touch panel or a key depression operation on a keyboard. an input means for inputting the tone intensity of each beat of the first performance data based on an operation by an operator;
a conversion means for converting the first performance data into second performance data based on the tone intensity of the musical tone of each beat, and determining the tone intensity of the musical tone of each beat of the second performance data,
a conversion means for converting a plurality of musical tones in the same beat of the second performance data into a uniform tone intensity based on the tone intensity of each of the musical tones in the same beat, when the plurality of musical tones in the same beat exist; an input means for inputting the tone intensity of each beat of the first performance data based on an operation by an operator;
a conversion means for converting the first performance data into second performance data based on the tone intensity of the musical tone of each beat, and determining the tone intensity of the musical tone of each beat of the second performance data,
a conversion means for converting a plurality of musical tones within the same beat of the second performance data based on the tone intensities of the musical tones within the same beat of the first performance data when the plurality of musical tones are within the same beat of the second performance data; an input means for inputting the tone intensity of each beat of the first performance data based on an operation by an operator;
a conversion means for converting the first performance data into second performance data based on the tone intensity of the musical tone of each beat, and determining the tone intensity of the musical tone of each beat of the second performance data,
a conversion means for converting a plurality of musical tones within the same beat of the second performance data based on a ratio between the intensity of the musical tones within each beat and the intensity of the plurality of musical tones within the same beat of the first performance data, when the plurality of musical tones exist within the same beat; an input means for inputting timing information for each beat of the first performance data based on an operation by an operator;
a conversion means for converting the first performance data into second performance data based on the timing information of each beat;
a first display control means for controlling the display of a first graphic indicating the onset time of each musical tone of the first performance data and a second graphic indicating the time of each beat based on beat information of the first performance data along a time axis;
The performance data conversion device is characterized in that the conversion means calculates tempo information for each beat of the second performance data based on timing information for each beat and tempo information of the first performance data . an input means for inputting timing information for each beat of the first performance data based on an operation by an operator;
a conversion means for converting the first performance data into second performance data based on the timing information of each beat;
a second display control means for controlling the display of the playback position of the first performance data;
the converting means calculates tempo information for each beat of the second performance data based on the timing information for each beat and tempo information for the first performance data;
The performance data conversion device is characterized in that the input means inputs the timing information based on the playback position of the displayed first performance data. an input means for inputting timing information for each beat of the first performance data based on an operation by an operator;
a conversion means for converting the first performance data into second performance data based on the timing information of each beat,
the converting means calculates tempo information for each beat of the second performance data based on the timing information for each beat and tempo information of the first performance data;
The performance data conversion device is characterized in that the input means inputs both timing information for each beat of the first performance data and sound intensity for each beat based on a single operation by an operator. The regeneration means
when timing information of a beat is input by said input means before the playback position of said first performance data reaches the beginning of the beat of said first performance data, said first performance data is played back by skipping the playback position of said first performance data to the beginning of the next beat;
3. The performance data conversion device according to claim 2, wherein when the playback position of said first performance data reaches the beginning of a beat of said first performance data, if timing information for that beat has not yet been input by said input means, playback of said first performance data is stopped, and when timing information for that beat is thereafter input by said input means, playback of said first performance data is resumed. further comprising a reproducing means for reproducing the first performance data;
The performance data conversion device according to any one of claims 4 to 6, characterized in that the input means inputs the tone intensity of the musical sound of the beat corresponding to the playback position while the first performance data is being played back by the playback means. 7. The performance data conversion device according to claim 4 , wherein the input means inputs the sound intensity of the musical tone of the beat designated by an operator's operation. The performance data conversion device according to any one of claims 4 to 6, 11 and 12, characterized in that the input means inputs the sound intensity of the musical tone of each beat of the first performance data based on the tap strength or tap position on the touch panel or the key pressing speed or key pressing strength of the keyboard operation. A performance data conversion program for causing a computer to function as the performance data conversion device according to any one of claims 1 to 13 .