JP4628298B2 - Piano roll display device and piano roll display program - Google Patents

Description

  The present invention relates to a piano roll display device and a piano roll display program for performing piano roll display according to automatic performance information for performing automatic performance.

  2. Description of the Related Art Conventionally, display devices that display automatic performance information for performing an automatic performance are known. As one of the graphic display methods, there is a method of displaying on a display screen by simulating paper on which automatic performance information for performing automatic performance called a piano roll is recorded.

  The piano roll is a paper roll in which automatic performance information used in an organ-type music box or an automatic piano is perforated. It was made from the end of the 19th century with a mechanism that feeds these rolls sequentially, reads the perforated part with air pressure, and operates a hammer.

Japanese Patent Laid-Open No. 2001-51586 discloses a device that displays musical notes like a piano roll as a performance instruction device. In this apparatus, a key operation range from key depression to key release is displayed with a scroll bar, the scroll bar rolls down as the music is played, and the player is instructed to press or release the key.
JP 2001-51586 A

  However, when the performance tempo is set for the conventional piano roll display, the speed of scrolling the piano roll display is changed according to the set performance tempo value. Unlike that, there was a problem that there was a sense of incongruity. That is, in an actual piano roll, the speed at which the roll is fed is constant, and the lengths of the holes corresponding to the notes punched in the piano roll are different.

  Further, in an automatic piano apparatus using actual piano roll paper, when the roll paper is rewound or fast-forwarded, it is not sent instantaneously but at a predetermined speed. Also, when rewinding or fast-forwarding is started or stopped, and when rewinding or fast-forwarding is being performed, the machine has generated a sound. The display device does not rewind instantaneously or generates a mechanical sound, and has a problem of lack of reality unlike an automatic piano that plays an actual piano roll.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a piano roll display device and a piano roll display program that can simulate an automatic piano that performs an automatic performance with a piano roll. .

  In order to achieve this object, the piano roll display device according to claim 1 uses automatic performance information storage means for storing automatic performance information, and notes based on the automatic performance information stored in the automatic performance information storage means. A display screen for displaying a corresponding figure, a performance tempo setting means for setting a performance tempo, and a note tempo displayed on the display screen in accordance with the performance tempo set by the performance tempo setting means Note length setting means for setting the length of the figure corresponding to the length, and scroll means for scrolling the display screen at a constant speed regardless of the performance tempo.

In piano roll display device described above, it may be so that an automatic performance means for sending an instruction to the sound source to generate a musical tone in accordance with the performance tempo set by the tempo setting means.

In the above-mentioned piano roll display device, it is desirable that the scroll means is configured to scroll so that a performance place where the automatic performance means is playing is displayed on the display screen.

In piano roll display device described above may be configured to so that with a measure line setting means for displaying a bar line on the display screen.

The piano roll display device according to claim 1 , further comprising display position setting means for arbitrarily setting a display position of a score displayed on the display screen, wherein the scroll means is set by the display position setting means. The display screen is scrolled to a score display position at a speed faster than the predetermined speed.

3. The piano roll display device according to claim 2 , wherein an automatic performance information storage means for storing automatic performance information and a display screen for displaying a figure corresponding to a musical note based on the automatic performance information stored in the automatic performance information storage means. A performance tempo setting means for setting a performance tempo, and a figure length corresponding to the length of a note displayed on the display screen in accordance with the performance tempo set by the performance tempo setting means Note length setting means for setting the length, and scroll means for scrolling the display screen at a constant speed regardless of the performance tempo. Furthermore, it comprises pseudo sound generating means for generating pseudo sound when the scroll means scrolls the display screen at a speed faster than the constant speed.

The piano roll display program includes an automatic performance information storage means for storing automatic performance information, and a display screen for displaying a graphic corresponding to a note based on the automatic performance information stored in the automatic performance information storage means. This is executed by the roll display device, and corresponds to the performance tempo setting step for setting the performance tempo and the length of the note displayed on the display screen in accordance with the performance tempo set by the performance tempo setting means. A note length setting step for setting the length of the figure, and a scroll step for scrolling the display screen at a constant speed regardless of the performance tempo.

In the foregoing piano roll display program, may be so that an automatic performance sending an instruction to the sound source to generate a musical tone in accordance with the performance tempo set by the tempo setting step.

In the above-described piano roll display program, it is preferable that the scroll step is configured to scroll so that a performance place where the automatic performance step is performed is displayed on the display screen.

In the foregoing piano roll display program, it may be so that with a measure line setting step of displaying a bar line on the display screen.

The above-mentioned piano roll display program includes a display position setting step for arbitrarily setting a display position of a score displayed on the display screen, and the scroll step includes a display position of the score set by the display position setting step. It is desirable that the display screen is scrolled at a speed faster than the constant speed.

  According to the piano roll display device of the first aspect, the performance tempo setting means for setting the performance tempo, and the notes displayed on the display screen according to the performance tempo set by the performance tempo setting means. Since it has note length setting means for setting the length of the figure corresponding to the length and scroll means for scrolling the display screen at a constant speed regardless of the performance tempo, the piano roll displayed on the display screen is The display is equivalent to that of an actual piano roll, and there is an effect that a display without a sense of incongruity is performed.

Furthermore, according to the piano roll display device described above is provided with the automatic performance means for sending an instruction to the sound source to generate a musical tone in accordance with the performance tempo set by Starring Kanade tempo setting means, it matches the automatic performance The piano roll is displayed and the automatic piano can be simulated.

Furthermore, according to the piano roll display device described above, scroll means, since the scroll so that play where the automatic performance device is playing is displayed on the display screen, on the score the automatic performance is carried out There is an effect that the place can be confirmed on the piano roll.

Furthermore, according to the above-mentioned piano roll display device, since the bar line setting means for displaying the bar line on the display screen is provided, there is an effect that it is easy to grasp the relationship between the figure displayed on the piano roll and the musical note. .

The piano roll display device according to claim 1 , further comprising display position setting means for arbitrarily setting a display position of a score displayed on the display screen, wherein the scroll means is a score set by the display position setting means. Scrolls the display screen at a speed faster than a certain speed to the display position of, so when you fast forward or rewind the piano roll, you can simulate how the actual piano roll is fast forwarded or rewound There is.

According to the piano roll display device of claim 2 , the performance tempo setting means for setting the performance tempo, and the length of the note displayed on the display screen in accordance with the performance tempo set by the performance tempo setting means. Since it has note length setting means for setting the figure length and scroll means for scrolling the display screen at a constant speed regardless of the performance tempo, the piano roll displayed on the display screen is the actual piano roll. The display is equivalent to the above, and there is an effect that a display without a sense of incongruity is performed. Furthermore, since the scroll means is provided with a pseudo sound generating means for generating a pseudo sound when the display screen is scrolled at a speed faster than a constant speed, the actual piano roll is better when the piano roll is fast-forwarded or rewound. This has the effect of simulating how fast forwards and rewinds.

According to the piano roll display program, the performance tempo setting step for setting the performance tempo and the length of the figure corresponding to the length of the note displayed on the display screen according to the performance tempo set by the performance tempo setting means Note length setting step and scroll step to scroll the display screen at a constant speed regardless of the performance tempo, the piano roll displayed on the display screen is the same display as the actual piano roll Thus, there is an effect that a display without a sense of incongruity is performed.

Furthermore, according to the aforementioned piano roll display program is provided with the automatic performance sending an instruction to the sound source to generate a musical tone in accordance with the performance tempo set by Starring Kanade tempo setting step, it matches the automatic performance The piano roll is displayed and the automatic piano can be simulated.

Furthermore, according to the aforementioned piano roll display program, scroll step, since the scroll so that play where the automatic performance device is playing is displayed on the display screen, on the score the automatic performance is carried out There is an effect that the place can be confirmed on the piano roll.

Furthermore, according to the aforementioned piano roll display program is provided with the bar-line setting step of displaying a bar line in Table示画surface, the effect of easily grasp the relationship between the figure and notes that appear on piano roll is there.

Furthermore, according to the aforementioned piano roll display program includes a display position setting step of setting a display position of the musical score to be displayed in the table示画surface arbitrarily, scrolling step, the display of musical score set by the display position setting step Since the display screen is scrolled to a position faster than a certain speed, it is possible to simulate how the actual piano roll is fast-forwarded or rewound when the piano roll is fast-forwarded or rewound. .

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing an electrical configuration of a piano roll display device 1 according to an embodiment of the present invention.

  The piano roll display device 1 includes a CPU 2, a ROM 3, a RAM 4, an operator 5, a display 6, a sound source 7, a flash memory 8, a keyboard 9, an amplifier 10, and a speaker 11. Yes.

  The CPU 2 is an arithmetic unit and performs processing such as automatic performance and piano roll display according to a control program stored in the ROM 3. The CPU 2 is provided with a timer 2a that measures time in a predetermined time unit.

  The ROM 3 stores various control programs 3a executed by the CPU 2 and fixed value data referred to when the control programs 3a are executed. One of the control programs is a control program that performs an automatic performance and displays a piano roll.

  The RAM 4 has a working area in which the CPU 2 temporarily stores various data and the like when the control program stored in the ROM 3 is executed, and a display for storing display data when the piano roll diagram is displayed on the display 6. A rewritable memory having a data storage area. The RAM 4 has a flag memory 4a for storing a flag indicating whether automatic performance, fast-forwarding or rewinding is performed, and a tempo value memory 4b for storing a currently set tempo value. And a display parameter memory 4c for storing variables and the like when drawing the piano roll diagram.

  The operation element 5 is an operation element for adjusting a switch for instructing the start or stop of the automatic performance or the volume when the automatic performance is performed. With reference to FIG. 2, the operation element according to the present invention will be described later.

  The display 6 is a display configured by an LCD, and displays a piano roll diagram. The display mode will be described later with reference to FIG.

  The sound source 7 forms a musical tone with the pitch, volume, and timbre instructed by the CPU 2, and fast-forwards and rewinds waveforms of various musical instruments (for example, piano, flute, violin, etc.) and actual piano roll paper. Stores the rotational sound of the roller during rolling and the pseudo sound that simulates the mechanical sound that is generated when the roll paper is wound at high speed and when winding is started or when winding is completed, and the waveform is stored. A musical tone is formed by reading. The musical sound formed by the sound source 7 is amplified by the amplifier 10 and emitted by the speaker 11.

  The flash memory 8 is a rewritable and non-volatile memory that is detachably mounted in a slot (not shown) provided in the piano roll display device 1 and stores automatic performance information 8a for performing an automatic performance. The automatic performance information 8a corresponds to the music, and is composed of performance information that performs along with the passage of time along with information such as the title of the music and the composer, and will be described later with reference to FIG.

  The keyboard 9 is a musical instrument keyboard composed of a plurality of white keys and black keys. The pitch of the musical tone to be generated is designated, the start of sounding is instructed by pressing the key, and the sounding is stopped by releasing the key. Is instructed.

  A performance sound is generated from the sound source 7 by playing the keyboard 9, and automatic performance information can be formed by recording the performance.

  Next, with reference to FIG. 2, the display screen displayed on the display device 6 and the controls that are operated when performing an automatic performance will be described. FIG. 2 is a panel diagram showing the display 6 and four switches arranged on the operation panel of the piano roll display device 1.

  A piano roll diagram is displayed on the display screen. In this embodiment, in the piano roll diagram, the time during which the key is pressed is indicated by a black rectangular musical note line 21a, the pitch of the key on the keyboard is simulated to represent the pitch in the horizontal direction, and the more it goes to the right. A key with a high pitch is displayed.

  The vertical direction represents time and represents an event in which time advances from above to below. Accordingly, the piano roll diagram is scrolled from below to above (in the direction of arrow A) as the performance progresses.

  In the display screen, a rectangular note line 21a that is long and displayed in black in the vertical direction indicates that the keyboard is being pressed. In the display screen, a broken line 21c drawn in the vertical direction indicates the position of the five-line score, and in the same figure, the five lines on the right are treble parts (F, D, B, G, E indicates each pitch), and the left five lines correspond to the bass part (showing each pitch of A, F, D, B, G in order from the dashed line on the left of the slightly thick dashed line in the center) The slightly thick broken line in the center indicates the pitch of the center C.

  In the display screen, a solid line drawn in the horizontal direction indicates a bar line, and in this display screen, the upper bar line interval is wide and the lower bar line interval is narrow. This means that the tempo is slow in the upper part where the interval is wide and the tempo is fast in the part where the interval is short.

  Below the display 6, there are arranged four switches that are operated when performing an automatic performance. In order from the left side, there are a rewind switch 5a, a play switch 5b, a stop switch 5c, and a fast-forward switch 5d. When the rewind switch 5a is operated, the performance position of the current song is returned to the beginning at a high speed, and when the play switch 5b is operated, the performance is started from the current position. When the stop switch 5c is operated, it stops at the place where it is played, and when the fast-forward switch 5d is operated, the current position is sent at high speed toward the end of the song.

  When the automatic performance is performed, the performance is performed in accordance with the automatic performance information, and a piano roll diagram corresponding to the automatic performance information is displayed on the display device 6. When rewinding or fast-forwarding is instructed, the performance based on the automatic performance information is not performed, a sound simulating a mechanical sound on which the piano roll paper is wound is generated, and the piano roll diagram is scrolled at high speed ( (See FIG. 4 (a)). When winding is started, the sound source 7 forms a mechanical sound that starts winding, and when winding is finished, a sound that simulates a mechanical sound that stops the machine.

  Next, automatic performance information will be described with reference to FIG. FIG. 3 is a table showing automatic performance information. The automatic performance information in this embodiment sequentially stores the type of event and the time (delta) until the next event as a set of data as time elapses.

  In the table shown in FIG. 3, first, the data described in the first line is that the event type has a tempo value of 80 (beats / minute) and the time to the next event is 0 (unit is tick). is described. Here, the tick is a value obtained by dividing one beat by a predetermined number. Here, a value obtained by dividing one beat by 96 is a tick. The read tempo value is stored in a tempo value memory 4 b provided in the RAM 4.

  In the data described in the next line, the event type is note-on, and the time to the next event is 96 ticks. Here, note-on is data indicating that a key in the MIDI standard has been pressed. In FIG. 3, note numbers indicating pitches are shown in the second column, and velocity indicating key pressing speed is omitted. Show. Similarly, automatic performance information is composed of an event and the time until the next event.

  Next, with reference to FIG. 4, the piano roll figure displayed on the indicator 6 at the time other than the automatic performance will be described. FIG. 4A is a piano roll diagram displayed when rewinding is performed. With the conventional piano roll display, when the rewind is instructed, the performance position is instantaneously moved to the beginning of the song, which is unpleasant. However, in the present invention, at a high speed in the opposite direction to the performance. The scroll display is performed to simulate the mechanical roll-up of the piano roll paper, such as an actual automatic piano.

  FIG. 4B is a diagram for displaying the beginning of the piano roll diagram, and displays the top portion of the piano roll paper in a simulated manner.

  Next, with reference to FIGS. 5-8, the piano roll display process performed when CPU2 runs a control program is demonstrated. FIG. 5 is a flowchart showing a main routine activated when the power of the piano roll display device 1 is turned on. This main routine is repeatedly executed until the power of the piano roll display device 1 is cut off.

  First, initial setting is performed (S1). As this initial setting, the display showing the beginning of the song shown in FIG. 4B is performed on the display screen. Here, in order to simplify the description, it is assumed that performance information of a plurality of songs is stored in the flash memory 8 and the music selection has already been performed. In addition, the timer 2a is set to measure time at a predetermined time interval (for example, 1 msec), and set to prohibit timer interruption.

  Next, it is determined whether or not the play switch 5b has been operated to instruct the start of performance (S2). When the play switch 5b is operated (S2: Yes), the timer interrupt is set to be permitted, and the flag stored in the flag memory 4a provided in the RAM 4 is set to a value indicating automatic performance. (S3).

  When the play switch is not operated (S2: No), or when the process of S3 is finished, it is determined whether or not the stop switch 5c is operated to stop the performance (S4).

  When the stop switch 5c is operated (S4: Yes), the timer interrupt is set to be prohibited (S5). At this time, if the automatic performance is being performed, the sound source 7 is instructed to stop the sounding of the musical sound that is being generated. If the fast-forwarding is in progress, the generation of the fast-forwarding pseudo-sound is stopped. An instruction is sent to the sound source 7 to stop the generation of the return pseudo sound.

  When the stop switch 5c is not operated (S4: No), or when the process of S5 is finished, it is determined whether or not the rewind switch 5a is operated to instruct rewinding (S6). When the rewind switch 5a is operated (S6: Yes), timer interruption is permitted, a flag indicating rewind is stored in the flag memory 4a, and a mechanical sound for starting rewinding of the piano roll paper is simulated. An instruction is sent to the sound source 7 so as to generate a simulated sound that is generated and then rewound (S7).

  When the rewind switch 5a is not operated (S6: No), or when the process of S7 is finished, it is determined whether or not the fast-forward switch 5d is operated to instruct fast-forward (S8). When the fast-forward switch 5d is operated (S8: Yes), a timer interrupt is permitted, a flag indicating fast-forwarding is stored in the flag memory 4a, and a sound that simulates a mechanical sound that starts fast-forwarding of piano roll paper is generated. Thereafter, an instruction is sent to the sound source 7 so as to generate a simulated sound that is fast-forwarded (S9). When the fast-forward switch 5d is not operated (S8: No), or when the process of S9 is terminated, the process returns to S2.

Next, timer interrupt processing will be described with reference to FIG. FIG. 6 is a flowchart showing timer interrupt processing. With reference to the flag stored in the flag memory 4a, it is determined whether or not an automatic performance is currently being performed (S11). If an automatic performance is currently being performed (S11: Yes), the value of Δtick is calculated (S12). This Δtick is the number of ticks corresponding to the time interval at which the timer interrupt occurs. As described above, when the timer interrupt time interval is 1 msec, the tick is a value obtained by dividing one beat by 96, and the tempo value (stored in the tempo value memory 4b) is tempo,
Δtick = (tempo × 96) / (60 × 1000)
Next, the number of ticks tick from the start of the current automatic performance is obtained (S13), and it is determined whether there is an event during this Δtick (S14). As described above, since the automatic performance information stores the type of event and the time until the next event, the time from the performance start of each event may be calculated and stored in advance, or already processed. It is also possible to store the accumulated time up to the event that ended and to determine whether or not the time of the next event has reached the current time.

  If there is an event during Δtick (S14: Yes), the event is processed (S15). That is, if the event is information related to the generation of musical sounds such as note-on and note-off, the information is transmitted to the sound source 7. If the event is information indicating the tempo value, the tempo value is used as the tempo value in the RAM 4. Store in the memory 4b.

  When there is no event in the determination process of S14 (S14: No), or when the process of S15 is ended, the piano roll diagram displayed on the display 6 is updated (S16). This update process will be described later with reference to FIGS.

  In the determination process of S11, when it is determined that the automatic performance is not currently being performed based on the flag stored in the flag memory 4a (S11: No), it is determined whether or not fast-forwarding is currently set based on the flag (S11: No). S21). If fast-forward is currently set (S21: Yes), the value FD is added to the tick value to advance the tick value (S22). This value FD is a value for scrolling the piano roll diagram at high speed during fast-forwarding, and is, for example, the number of ticks per beat (96).

  Next, it is determined whether or not the value of tick has reached the end of the song (S23). When the end of the song has been reached (S23: Yes), it is changed to an imitation sound that fast-forwards the piano roll paper, and an imitation sound is generated when the fast-forwarding of the piano roll paper is stopped, and the timer interrupt is prohibited (S24). ). When the end of the song has not been reached (S23: No), or when the process of S24 is completed, the process proceeds to the piano roll display process of S16.

  In the determination process of S21, if it is determined that fast-forwarding is not currently being performed based on the flag stored in the flag memory 4a (S21: No), the value BD is calculated from the value of tick because it is currently set to rewind. The value of tick is returned by addition (S31). This value BD is a value for scrolling the piano roll diagram in the reverse direction at a high speed during rewinding, and is, for example, the number of ticks per beat (96).

  Next, it is determined whether or not the value of tick has reached the beginning of the song (the beginning of the song) (S32). If the beginning of the song is reached (S32: Yes), it is changed to a pseudo sound for rewinding the piano roll paper, and a pseudo sound is generated when the rewind of the piano roll paper is stopped, and the timer interrupt is set to be prohibited. (S33). If the beginning of the song has not been reached (S32: No), or if the process of S33 is terminated, the process proceeds to the piano roll display process of S16.

Next, the piano roll display process of S16 will be described with reference to FIGS. FIG. 7 is a flowchart showing piano roll display processing. In this piano roll display process, the current tick value is displayed so as to be located near the center of the display 6 in the vertical direction, and the displayed range is the automatic performance information from time t0 to time t1. Here, variables used in this process will be described. These variables are stored in a display parameter memory provided in the RAM 4.
“Time” indicates the current time when drawing,
“Wait” is the time from the time time to the next event,
map [n] represents a note map and is a flag indicating that any key n is pressed. “TempoD” is a tempo value to be referred to when displaying, and is different from the tempo value stored in the tempo value memory 4b.

  In the drawing process, first, the tempo value at time t0 is substituted into tempoD, and 1 is substituted into the flag map [n] corresponding to the key in the depressed state, thereby obtaining the value of wait (S41). These values are obtained by processing the performance information sequentially from the beginning of the song. Each value at the time t0 when the previous display process is performed is stored, and from this state, the current t0 is stored. Can be obtained by processing changes up to.

  Next, time is set to time t0 (S42), and it is determined whether time has not reached time t1 (S43). When the time reaches the time t1 (S43: No), the drawing on the entire display screen is finished. Therefore, the drawing process is finished. When the time does not reach the time t1, the time (S43: Yes). , Dt is set to a smaller value of either wait or (t1-time) (S44), and a note line for a pitch whose map [n] is 1 is drawn (S45). This note line is a line segment from time to time + dt with respect to pitch n.

  If there is a bar line during this time dt, a horizontal line is drawn at the time on the display screen corresponding to the bar line time.

  Next, the automatic performance information corresponding to the time dt is read (S46). The process of proceeding with reading will be described later with reference to FIG. Next, the current time time is advanced by dt (S47), and the process returns to S43.

  Next, with reference to FIG. 8, a process for reading the automatic performance information will be described. FIG. 8 is a flowchart showing a process of reading the automatic performance information.

  In the process of reading the automatic performance information, first, the variable wait is set to a value obtained by subtracting dt (S51). It is determined whether the value of the wait is less than or equal to 0 (S52). If the value of the wait is less than or equal to 0 (S52: Yes), the automatic performance information is read and the next event and the event are read. The corresponding stored delta is obtained (S53).

  Next, it is determined whether or not the event type indicates a tempo value (S54). If the event type indicates a tempo value (S54: Yes), the value of tempoD is rewritten to that value (S54: Yes). S55).

  If the event type does not indicate a tempo value (S54: No), it is determined whether the event type is note-on (S56). If the event type is note-on (S56: Yes). The flag map [n] is set to 1 (S57).

  If the event type is not note-on (S56: No), it is determined whether the event type is note-off (S58). If the event type is note-off (S58: Yes), the flag map is determined. [N] is set to 0 (S59).

  When the event type is not note-off (S58: No), or when the processes of S55 and S57 and S59 are terminated, the value of wait is set to wait + delta / tempoD (S60), and the process returns to S52.

  Here, since the value of delta is divided by the tempo value, the piano roll diagram is displayed with the time axis compressed when the tempo value is large, and with the time axis expanded when the tempo value is small. Therefore, even if the note length is the same, the length of the figure displayed as a piano roll diagram is shortened. Conversely, when the tempo value is small, the figure length is displayed longer.

  If the wait value becomes a positive value in the determination process of S52, the process of reading the automatic performance information is terminated.

  As described above based on the embodiment, according to the present invention, the piano roll diagram is scrolled at a constant speed regardless of the value of the tempo, and an apparatus using piano roll paper such as an actual automatic piano is used. The situation can be faithfully reproduced.

  In addition, when fast-forwarding and rewinding, the actual machine roll sound of a piano roll paper such as an actual automatic piano is simulated so that a piano such as an automatic piano can be faithfully reproduced. A device using roll paper can be simulated.

  The performance tempo setting means and the performance tempo setting step described in the claims correspond to the processing of S55 of the flowchart shown in FIG. 8, and the note length setting means and the note length setting step are the flowchart shown in FIG. 6 corresponds to the process of S16 of the flowchart shown in FIG. 6, and the automatic performance means and the automatic performance step correspond to the process of S15 of the flowchart shown in FIG. The measure line setting means and the measure line setting step correspond to the process of S45 in the flowchart shown in FIG. 7, and the display position setting means and the display position setting step correspond to the processes of S6 to S9 in the flowchart shown in FIG. .

  As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, in the above embodiment, the present invention is applied to the piano roll display device 1 incorporated in an electronic musical instrument having the keyboard 9 or the like. However, in a personal computer, the piano roll is displayed on a display device such as a liquid crystal display. You may do it.

  In the above embodiment, the automatic performance is performed based on the automatic performance information and the piano roll is displayed based on the automatic performance information. However, the performance instruction is performed in the piano roll format according to the automatic performance information. The accompaniment part may be automatically played according to the accompaniment part automatic performance information. In this case, the piano roll display is performed in synchronization with the progress of the accompaniment part.

  In the above embodiment, the tempo value is stored in the automatic performance information as time elapses. However, the operation panel is provided with an operation element for arbitrarily setting the tempo value, and the operation element is operated. The tempo value may be set accordingly.

  In the above embodiment, in response to the occurrence of a timer interruption, the musical tone of automatic performance is generated or stopped and the display of the piano roll is updated. However, the display update frequency is low (for example, 30 msec). Every).

  In the above embodiment, the piano roll diagram is scrolled from the bottom to the top as the performance progresses. However, the piano roll diagram may be scrolled from the top to the bottom or may be scrolled horizontally. Moreover, as shown to Fig.9 (a), it is good also as a display as which a piano roll paper is conveyed toward the back from this side as a three-dimensional display.

  In the above embodiment, the musical note line indicating the portion where the key is pressed is the same thickness, but the thickness may be changed according to the volume as shown in FIG. 9B. In addition, display such as changing the gray scale according to the volume of the musical sound may be performed. In FIG. 9B, in the case of an organ, the thickness is changed depending on the volume, and in the case of a piano, immediately after the key is pressed, the display is dark black, and the volume gradually decreases, simulating that the volume gradually decreases. It is displayed as follows. Further, as shown in the bottom row of FIG. 9B, a square may be shown at the position where the key is pressed, and the size of the key may be expressed by the size of the square.

It is a block diagram which shows the electric constitution of the piano roll display apparatus in embodiment of this invention. It is a panel figure which shows the operation panel of the piano roll display apparatus which has an operation element and the display screen on which a piano roll figure is displayed. It is a table which shows automatic performance information. (A) is a piano roll figure displayed when rewinding is performed, and (b) is a figure which shows the beginning of the music of a piano roll. It is a flowchart which shows a main process. It is a flowchart which shows a timer interruption process. It is a flowchart which shows a drawing process. It is a flowchart which shows the process which advances automatic performance information in a drawing process. It is a figure which shows the modification of a piano roll figure.

Explanation of symbols

1 Piano roll display device 2 CPU
3 ROM
3a Control program (piano roll display program)
4 RAM
6 Display 7 Sound source (mock sound generation means)
8 Flash memory (automatic performance information storage means)

Claims (2)

In a piano roll display device comprising an automatic performance information storage means for storing automatic performance information, and a display screen for displaying a graphic corresponding to a note based on the automatic performance information stored in the automatic performance information storage means,
A performance tempo setting means for setting a performance tempo;
Note length setting means for setting the length of a figure corresponding to the length of the note displayed on the display screen according to the performance tempo set by the performance tempo setting means;
Scroll means for scrolling the display screen at a constant speed regardless of the performance tempo ;
Display position setting means for arbitrarily setting the display position of the score displayed on the display screen ,
The piano roll display device characterized in that the scroll means scrolls the display screen at a speed faster than the constant speed to the score display position set by the display position setting means . In a piano roll display device comprising an automatic performance information storage means for storing automatic performance information, and a display screen for displaying a graphic corresponding to a note based on the automatic performance information stored in the automatic performance information storage means,
A performance tempo setting means for setting a performance tempo;
Note length setting means for setting the length of a figure corresponding to the length of the note displayed on the display screen according to the performance tempo set by the performance tempo setting means;
Scroll means for scrolling the display screen at a constant speed regardless of the performance tempo;
A piano roll display device comprising: an onomatopoeia generating means for generating onomatopoeia when the scroll means scrolls the display screen at a speed faster than the constant speed.

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