JPH04368996A - Automatic musical performance device - Google Patents

Abstract

PURPOSE:To execute the automatic musical performance whose musicality is abundant by correcting musical note information inputted by a real time input, and outputting music in a state it is visible exactly. CONSTITUTION:After musical note information is inputted by a real time input, when a rhythm key is tuned on T3, the time when the rhythm key is turned on in the next time is counted T4, and also, sounding is executed, based on the musical note information T5, T6, and subsequently, when the rhythm key is inputted T8, T12, a step expansion processing is executed, a step time and a gate time are corrected and calculated, a value of a RAM is rewritten, and also, a tempo is calculated at every musical note and written in the RAM T10, T14. By this corrected musical note information, a music output processing is executed, and by the tempo data and the corrected musical note information, the automatic musical performance is executed.

Description

[Detailed description of the invention]

0001

FIELD OF INDUSTRIAL APPLICATION The present invention relates to an automatic performance device, and more specifically, it automatically plays a piece of music input from a note information input means constituted by a performance operator such as a keyboard, and
The present invention relates to an automatic performance device that outputs performance music in a visually recognizable state as musical score information.

0002

2. Description of the Related Art Conventionally, automatic performance devices have been devised that automatically perform music based on externally inputted music information. In such conventional automatic performance devices, there are two methods for inputting music information to be automatically performed: a so-called real-time input method and a step input method. This real-time input method uses a performance controller such as a keyboard as a means of inputting music, and inputs the scale and note length (corresponding to the type of note) by the user using the performance controller. Detected as song information to be played automatically. Another step input method is to use input means such as scale input keys and note length input keys to sequentially input the scales, etc. that make up the song to be played automatically, and then automatically play the input note information such as the scales. Detected as song information. As shown in Figure 15, the music information input and detected using the above method is stored in the memory for each note in the order of scale data, note length data, sounding interval (gate time), and sound strength (velocity). During automatic performance, this music information is read from the memory and musical notes are generated.

0003

[Problems to be Solved by the Invention] However, in such conventional automatic performance devices, especially automatic performance devices that input music information to be automatically played using a real-time input method, it is difficult for the user to use performance controls such as a keyboard. Since the input is performed sequentially by playing the song to be played automatically using
If you cannot accurately input the note information that makes up a song, especially the note length, and you try to output a score based on such inaccurate note information, the output score itself may be inaccurate. There was a problem. For example, if the step time of a quarter note is defined as 48, a note with a step time of 48 will be a quarter note. usually,
In the musical score display process, even if there is some error in the step time, it has been judged with some degree of accuracy in the past. For example, even if the step time 48 is set to 49 or 47 in order to draw a quarter note, it will be determined as a quarter note and a quarter note musical score will be output. However, when actually inputting using the real-time input method, a human performs using a keyboard or the like, so even if you intend to play a quarter note, the step time may be 55 or 40. If there is a large deviation between the predefined step time and the actually input step time in this way, the note length cannot be accurately determined in the musical score output process, resulting in the output of an incorrect musical score. SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide an automatic performance device that is capable of accurately outputting music information inputted by a real-time input method as a musical score, and capable of automatic performance that is natural and rich in musicality. The purpose is

0004

[Means for solving the problem] The invention according to claim 1 includes:
A note information input means for inputting a series of note information constituting music information by playing using a performance operator; and a note information storage means for sequentially storing each piece of note information input from the note information input means. , a time signature input means for inputting the time signature of the song inputted by the note information input means; correcting the note information stored in the note information storage means based on the time signature information input from the time signature input means; a correction means for outputting correction information for converting subsequent note information into note information before correction; and a correction means for rewriting the corrected note information corrected by the correction means with note information stored in the note information storage means. storage control means for storing the correction information for each note in the note information storage means; and a storage control means for storing the correction information for each note in the note information storage means; The present invention is characterized by comprising a musical tone generating means for generating musical tones, and a musical score outputting means for outputting musical score information in a visible state based on the musical note information in the musical note information storage means rewritten by the storage control means. The note information input means may be a keyboard as described in claim 2, and as described in claim 3, the note information may include a scale, note length, and each note. It may be possible to input the gate time as the generation time and velocity data for controlling the intensity of the sound. As described in claim 4, the correction means corrects the note length of the note information stored in the note information storage means based on the time signature information input from the time signature input means. Also, as stated in claim 5,
The note length and gate time of the note information stored in the note information storage means may be corrected based on the time signature information input from the time signature input means. The time signature input means may input the generation start timing of a tempo clock for measuring the note length of each note in correspondence with the time signature interval.

[0005]

[Operation] In the invention as claimed in claim 1, by playing the note information input means equipped with a performance operator, a series of note information constituting music information for automatic performance is inputted, and from the note information input means. Each piece of input note information is sequentially stored in the note information storage means. Further, the time signature of the music piece inputted by the note information input means is inputted from the time signature input means. The note information stored in the note information storage means is corrected by the correction means based on the time signature information input from the time signature input means, and is rewritten with the note information stored in the note information storage means under the control of the storage control means. It will be done. Further, this correction means outputs correction information for converting the corrected note information into pre-correction note information, and this correction information is stored in the note information storage means for each note under the control of the storage control means. is memorized. Based on the corrected note information and correction information in the note information storage means rewritten by the storage control means in this way, the musical sound generation means generates musical tones, and based on the corrected note information, the musical score output means: Output music score information in a visible state. Therefore, incorrect note information input by a human playing using the note information input means can be corrected to accurate note information based on the correction information, and an accurate musical score can be output. In addition, based on the corrected note information, musical tones can be converted to note information at the time of performance input and generated as musical tones, reducing the capacity of the storage means for storing note information while providing a natural and natural sound. , it is possible to perform automatic performances with rich musicality. In the invention as claimed in claim 2, since a keyboard is employed as the note information input means, it is possible to input music information to be automatically played by playing it in a natural state,
It is possible to perform automatic performances that are natural and rich in musicality. In the invention set forth in claim 3, the note information input means can input the scale, note length, gate time as the generation time of each note, and velocity data for controlling the intensity of the note as the note information. , it is possible to store more detailed information as note information, and it is possible to perform automatic performances that are even more natural and rich in musicality. In the invention set forth in claim 4, the correction means corrects the note length of the note information stored in the note information storage means based on the time signature information input from the time signature input means, so it plays an important role in unique performances. It is possible to appropriately correct the note lengths that play the notes, and it is possible to output even more accurate musical scores.
Furthermore, it is possible to perform automatic performances that are even more natural and rich in musicality. In the invention according to claim 5, the correction means corrects the note length and gate time of the note information stored in the note information storage means based on the time signature information input from the time signature input means, so that more songs can be played. Information can be corrected, a more accurate musical score can be output, and automatic performance can be performed that is more natural and rich in musicality. In the invention as set forth in claim 6, since the time signature input means inputs the generation start timing of the tempo clock for measuring the note length of each note in correspondence with the time signature interval, the user inputs the generation start timing of the tempo clock for measuring the note length of each note in accordance with the time signature interval. By inputting the notes appropriately, it is possible to make the note information more accurate and output the musical score more accurately, and it is also possible to change the song to suit the user's taste, making it even more usable. Users can freely play songs that suit their tastes.

[0006]

[Example] The following is a detailed explanation based on an example. 1 to 10 are diagrams showing an embodiment of an automatic performance device according to each invention of the present application. FIG. 1 is a block diagram of the automatic performance device 1, and the automatic performance device 1 includes a CPU (Central
Processing Unit) 2, RAM (Ran
dom Access Memory)3, ROM(R
ead Only Memory) 4, display section 5, clock generation circuit 6, keyboard 7, switch section 8, sound source circuit 9,
It includes a D/A converter 10, a sound generation circuit 11, and the like.

[0007] The ROM 4 stores various programs and data necessary for controlling the automatic performance device 1. The RAM 3 is mainly used as a work memory, and in particular, as shown in FIG. time), velocity (loudness) for each note, and the stored tempo, step time, and gate time are based on the time signature information input from the switch unit 8 as a time signature input means, which will be described later. is rewritten to the corrected value. Therefore, R
AM3 functions as a note information storage means.

[0008] The CPU 2 controls each part of the automatic performance device 1 according to the program in the ROM 4, and executes processing as an automatic performance device, particularly a correction process for note information as will be described later. Therefore, the CPU 2 also functions as a correction means. The display unit 5 is, for example, a liquid crystal display device using a liquid crystal, and displays various information to be notified to the user from the automatic performance device 1, in particular, the musical score of a song for automatic performance. Therefore, the display section 5 functions as a musical score output means. The clock generation circuit 6 includes an oscillator, a frequency divider, etc., and generates multiple types of clock signals.

The keyboard 7 is used to input note information of a song to be automatically played. Therefore, the keyboard 7 functions as a performance operator for playing a series of note information constituting music information, and constitutes note information input means. Switch part 8
is composed of various keys, and particularly includes a time signature key (time signature input means) for inputting the time signature of a piece of music to be automatically played.

The sound source circuit 9 generates a musical tone signal based on the musical tone data transferred from the CPU 2, and outputs the musical tone signal from the D/A.
Output to converter 10. The D/A converter 10 converts the input digital musical tone signal into an analog musical tone signal and outputs it to the sound generation circuit 11. The sound generation circuit 11 is, for example,
It is composed of an amplifier, a speaker, etc., and amplifies the analog musical tone signal inputted from the D/A converter 10, and generates musical tone via the speaker, etc. Therefore, the tone generator circuit 9, the D/A converter 10, and the sound generation circuit 11 collectively constitute musical tone generation means.

Next, the operation will be explained. First, note information input processing of a song for automatic performance will be explained. To input note information of a song for automatic performance, first, key operations are performed on the switch section 8 to set the input mode.

Next, note information of a song for automatic performance is input by playing the song using the keyboard 7. keyboard 7
The note information input by playing a song using the includes notes, note lengths (step times), gate times, and velocities, and is input sequentially from the keyboard 7 as shown in Figure 2. The note information of each note is written into the RAM 3.

[0013] Now, if a song as shown in Figure 3 is played, and if the step time (note length) of a quarter note is set to 48, and each note is input with the correct note length and pronunciation time, then the figure The scale number, step time, gate time, and velocity values as shown in FIG. 4 are written into the RAM 3. However, when inputting note information by playing a song using the keyboard 7, the note length and pronunciation time for each note may not be the normal note length or pronunciation time due to the personality of the person playing the song. It is played with slight fluctuations centered around the note length and pronunciation time. As a result, actually RA
The values written in M3 include the length of the note played with slight fluctuations, and the step time and gate time as the sound generation section. The regular note length herein refers to a value preset by the performer for the piece of music, for example, a value set to 48 for a quarter note.

The note information input process will be explained below based on FIG. 5. In the note information input process, first,
Among the multiple clocks output from the clock generation circuit 6, the one with the highest clock frequency is set as the clock (step S1), and the start address of the note information storage area of the RAM3 is set as the variable i that specifies the address of the RAM3. (Data start address) (Step S
2). When the data start address is set in the variable i, clock counting is started (step S3), and it is checked whether the keyboard 7 has changed (step S4). If there is no change, it is checked whether the input has been completed (step S5), and if the input has not been completed, the process returns to step S4 and it is checked whether the keyboard 7 has changed.

When the keyboard 7 changes, it is checked whether the key is pressed or released (steps S6 and S7). Since the key is pressed at first, the process moves to step S8 and the address (i+
2-5) is larger than the data start address A (step S8). Initially, since the start address A is set as the variable i, the condition (i+2-5)>A is not satisfied in step S8, so the count value is not written to address (i+2-5) in step S9. , the process moves to step S10 and the address (
The scale number corresponding to the pressed key is written to address (i+1) and the velocity is written to address (i+4) (step S
10).

Next, the counter is set to 0 (step S11), counting is started (step S12), and the process returns to step S4. Similarly, changes in the keyboard 7 are checked, and if there is a change in the keyboard 7, it is checked whether the key is pressed or released (steps S4, S6, S7). Since the key has now been pressed, the key will be released next, and when the key release is detected, the count value is stored at address (i+3) (step S13). This count value indicates the time from key depression to key release, ie, gate time (sounding time).

When the writing of the count value is completed, (i+5) is set as the variable i, the variable i is set at the beginning of the address of the next note information, and the process returns to step S4 to check the next change in the keyboard 7. (Step S14).

Next, when the keyboard 7 is pressed down, this pressing down of the keyboard 7 is detected in steps S4 and S6, and the address (i+2
-5) is greater than the data start address A (step S8). The address is now advancing to the address of the next note after the data start address A, so
The condition (i+2-5)>A is satisfied, and the count value is written to address (i+2-5) (step T9). This count value indicates the time during which the keyboard 7 is pressed, that is, the step time (note length). Count value R
When the writing to AM3 is completed, the scale number of the pressed key is written in the address (i+1) and the velocity is written in the address (i+4) in the same manner as described above (step S10). After writing these data,
The counter is set to 0 and starts counting (steps S11, S12), and the process returns to step S4 to detect changes in the keyboard 7. Next, when keyboard 7 is released,
This key release is detected in step S7 and the address (i+3) is
Write the counter value (gate time) to (
Step S13), set the variable i indicating the address to (i+5)
, and the next change in the keyboard 7 is detected.

The above process is sequentially performed for each note played using the keyboard 7, and when the end of input is detected in step S5, the note information input process is completed. When this note information input process is completed, as shown in Figure 2, the scale number, step time, gate time, and velocity for each input note are stored in RAM 3 using five addresses in order from the first note. written. However, the tempo field is not written in the note information input process. That is, in the automatic performance apparatus 1, by playing a piece of music to be automatically played using a so-called real-time input method, note information of each note of the piece of music is inputted and written into the RAM 3. Therefore, the note information of the song to be played automatically is stored in RAM3.
It is written as it is played.

In this way, when all the note information of the song to be played automatically has been written into the RAM 3, the playback key of the switch section 8 is turned on to switch the time signature of each note while playing back the note information. Set using the time signature key in section 8. The time signature value set in this way is shown in Figure 2.
It is written in the tempo T column of RAM3 shown in FIG.

[0021] Next, this time signature setting process is performed. As shown in FIG. 6, the CPU 2 first sets the clock with the maximum clock frequency as the clock (step T1), and sets the variable i to the data start address A (the start address of the note information storage area of the RAM 3). j to 0,
The flag is set to 0 and the data start address A is set to variable k (step T2). Here, variable i is RAM
The variable j is a variable that indicates the read address of No. 3, and the variable j is a variable that indicates the number of notes in a beat. Further, the flag is a flag indicating whether the number of notes in a beat is one or not, and becomes 0 when the number of notes in a beat is two or more. The variable k is RA
This is a variable that indicates the write address to M3.

Next, it is checked whether the beat key has been input (step T3), and after waiting for the beat key to be input, the counter 2 starts counting (step T4).
). Counter 2 starts counting, and the scale number of address (i+1), step time of address (i+2), gate time of address (i+3), and velocity of address (i+4) are read from RAM 3 (
In step T5), a sound generation start instruction is output to the sound source circuit 9 together with the read note information (step T6). When the sound generation start instruction is output to the sound source circuit 9 along with the note information,
The tone generator circuit 9 generates a musical tone signal of the transferred scale number, and outputs it to the sound generation circuit 11 via the A/D converter 10 to generate the musical tone of the scale number.

Simultaneously with the generation of this musical tone, the clock counter 1 starts counting (step T7), and checks whether the time signature key has been input or whether the clock counter 1 has counted the gate time read out in step T5 (step T7). T8, T9). This clock counter 1 is a counter for counting gate time and step time. If the beat key is input before the clock counter 1 counts the gate time, step expansion processing is performed (step T10), and if the clock counter 1 counts the gate time before the clock key is input, the tone generator circuit 9 Outputs a sound stop instruction to
Generation of musical tones is stopped (step T11). In other words, regardless of whether or not a time signature key is input, the note will be sounded only for the gate time (sounding time) when it was input during the note information input process. It is checked whether the clock counter 1 has been turned on and whether the clock counter 1 has counted the step time (steps T12 and T13). When the time signature key is input, step development processing is performed (step T14).

The step development processing in step T10 and step T14 are the same processing, and the step development processing is performed in step T10 depending on whether the time signature key is input before or after the gate time has elapsed. The only difference is whether step processing is performed at step T14 or step T14. As shown in FIG. 7, this step expansion process is a process of calculating and storing tempo, step time, and gate time.

When proceeding to the step expansion process, first, it is checked whether the counter 2 is 0 (step P1). At first, counter 2 is not 0, so step P2
Step P3, the count value of counter 2 is set as variable S2, and the tempo T is calculated (step P3).
). As shown in FIG. 8, this tempo T calculation process is performed by performing the calculation process of equation (1) shown below. T=(60×b)/(S2×Tc) Here, b is a constant that sets how many times the time signature key is input within one beat. After completing the tempo T calculation process,
The calculated tempo T is stored in the RAM 3 (step P4). This tempo T storage process is a process of writing the calculated tempo T to address i of the RAM 3, as shown in FIG.
Used as correction information when performing automatically.

After completing the storage process of tempo T, next
Step time S is calculated and stored (step P5). As shown in FIG. 10, this step time S calculation/storage process is a process of performing arithmetic processing of equation (2) shown below and writing the calculation result to address (i+2) of the RAM 3. S=(S1×St)/S2 After completing the step time S calculation/storage process, the gate time G calculation/storage process is performed (step P6). The calculation and storage process of this gate time G is shown in Figure 1.
As shown in FIG. 1, this is a process of performing a calculation process using equation (3) shown below, and writing the calculation result to address (i+3) of the RAM 3. G=(G1×S)/S1

When the gate time G calculation and storage process is completed, it is checked whether a variable j indicating the number of notes in a beat is 0 (step P7). Initially, step T2 in FIG.
Since it is set to 0, the variable k is set to 1 and the flag is set to 1.
and sets the counter 2 to 0, starts counting the counter 2, and ends the step process (step P8,
P9). When the first step development process is completed, the process returns to the time signature setting process shown in FIG. 6, and when the gate time and step time have elapsed, the variable i is incremented by 5 (i+5
) and checks whether there is data after address i (steps T15 and T16). Since the first data is currently being processed, if there is still data after address i, it is checked whether the flag is 1 (step T17). Since the time signature key has now been input and step development processing has been performed, the flag is set to 1 in step P8 of FIG. Therefore, without incrementing the variable j, the flag is set to 0 and the process moves to step T5, where the note information at the next address is similarly read out and the sound generation process is performed.
Start counting clock counter 1 (step T
5, T6, T7).

While performing the sound generation process, it is checked whether the beat key has been input and whether the gate time and step time have elapsed (steps T8, T9, T12, T13).
). Now, as shown in Figure 3, there are two eighth notes in one beat.
If there is one, the gate time will elapse without the time signature key being input, and the sound will stop. Furthermore, the step time has elapsed, and the process moves to step T15 without performing step expansion processing. In step T15, the address is incremented by 5, and it is checked whether there is data after address i (step T16).
). In FIG. 3, since there is an eighth note, it is checked whether the flag is 1 (step T17), but since the flag was set to 0 in step T19 of the previous process, variable j is set to 1 in step T18. The flag is incremented by 0 and the flag is set to 0 in step T19.

After setting the flag, step T
Step 5 reads the next note information, and similarly performs the pronunciation process while checking the time signature key and the progress of the step time and gate time (step T
8, T9, T12, T13). When the gate time has elapsed, the sound generation is stopped, and when the beat key is input, the step development process shown in FIGS. 7 to 11 is performed.

In this step development process, the tempo T, step time S and gate time G are calculated and stored in the same way. Now, since there are two notes in one beat, first, in the first tempo calculation/storage process, step time calculation/storage process, and gate time calculation/storage process, the second note in one beat is calculated. Processing is performed. Even after completing the processing for this second note, there are two notes within one beat, and the variable j is incremented in step P18 of FIG. 6, so the variable j becomes 0 in step P7 of FIG. It is no longer. Therefore, the process moves to step P10, where the variable j is decremented by 1 and the variable k is decremented by 5, and then the step time of address (k+2) and the gate time of address (k+3) are read out (step P10).
11). This step time and gate time are those of the first note within one beat, and for this note, tempo T storage processing, step time S calculation/storage processing, and gate time G calculation/storage processing are performed (step P
4, P5, P6). When the tempo T storage process, the step time S calculation/storage process, and the gate time G calculation/storage process are performed for all the notes within one beat,
In step P7, the variable j is 0, so the variable k is set to 1, the flag is set to 1, and the counter 2 is set to 0 (step P8), and the counter 2 starts counting (step P9). Return to step 6, the time signature setting process. Note that when there are three or more notes in one beat, the step development process described above is performed for the number of notes.

When the above processing is performed sequentially for each piece of note information written in the RAM 3, at step T16 in FIG.
There is no data after address i, and the time signature setting process is completed. The time signature setting process described above is a process that corrects each note within an error range that can be accurately detected when outputting the note information of a song for automatic performance input using the real-time input method as a musical score. This means that it is being processed.

Now, as shown in FIG. 12, in the note information input process, the step time input from the keyboard 7 is
Assuming that the step time input using the time signature key in the time signature setting process is S2, the step time S2 input using the time signature key is input as a step time that allows the automatic performance device 1 to accurately identify musical notes. It is something that Here, if the performer inputting the song for automatic performance sets 48 as the step time of a quarter note, this 48 is adopted by the automatic performance device 1 when inputting the song for automatic performance. clock (reference clock)
It is the time to count 48 times. If the period of this reference clock is tc and the number of quarter note steps (base time) is St, then the length of the quarter note is St x tc, and the length of this quarter note is the automatically played song. The normal length of

[0033] At this time, the tempo Ts is Ts = (number of quarter notes occurring in 1 second) x 60 = 60 x 1/(St x
tc). This is because tempo is expressed as the number of quarter notes played per minute. here,
Assuming that the song is input in real time and tc is not changed, and the actual tempo input in real time is Tr, the tempo Tr by real time input is Tr = 6
0/(S1×tc).

However, the step time S1 of each note of the song input in real time has slightly different values centering around the set number of quarter note steps St, and the automatic performance device 1 cannot accurately perform the step time S1. It may not be possible to detect the note length of each note input using real-time input. Therefore, through the time signature setting process, the beats are set in time with the input music while playing, and the automatic performance device 1 corrects the note length to a value that allows it to accurately detect the note length. In the embodiment, since the length of one beat is a quarter note (b=1), the timing at which a quarter note occurs is recorded, and the interval is set as S2.

Based on the interval S2 input in this time signature setting process, the step time and gate time input in real time are corrected using equations (2) and (3) above, and are stored in the RAM as step time S and gate time G.
The value of 3 is being rewritten. Therefore, the step time S and gate time G in the RAM 3 rewritten by the time signature setting process are step times and gate times that the automatic performance device 1 can accurately recognize. The musical score can be displayed accurately using S and gate time G.

Next, a display process for outputting the musical note information stored in the RAM 3 in a visually recognizable state as a musical score will be explained. Display processing is performed by turning on the display key of the switch section 8. When the display key is pressed, the CPU 2 sets the start address A of the note information area as a variable i specifying the address of the RAM 3, as shown in FIG. 13 (step R1), and sets the address (i+
1) The scale number, the step time at address (i+2), and the gate time at address (i+3) are read out (step R2). Based on this note information, the CPU 2
The musical score is displayed on the display unit 5 using a normal musical score output method (step R3). Next, (i+5) is set as the variable i (step R4), and it is checked whether there is data after the set address i (step R5). When there is data after address i, it is determined that there is note information in RAM3 that has not yet been displayed as a musical score, and
Returning to step R2, the musical note information is read out from the RAM 3 in the same way and is displayed and output as a musical score (steps R2, R3
). In step R5, if there is no data after the address i, it is determined that there is no undisplayed note information in the RAM 3, and the musical score display process is ended.

In this musical score display process, the scale number, step time S and gate time G as musical note information stored in the RAM 3, particularly the step time S and gate time G, are determined by the time signature setting process as described above. The CPU 2 can accurately determine the note length of each note based on the step time and gate time, and can accurately display the musical score of the song for automatic performance.

Next, automatic performance processing will be explained based on FIG. 14. To perform automatic performance, the playback key of the switch section 8 is turned on. When the playback key is input, the CPU 2 first sets a variable i indicating the address of the RAM 3 to the starting address A of the note information area (step Q1), and sets the clock to the tempo T of the address i, as shown in FIG. is set to a value corresponding to (step Q2). The scale number of address (i+1), the step time S of address (i+2), the gate time G of address (i+3), and the velocity of address (i+4) are read out (step Q3), and the sound source circuit 8 is sent based on the read note information. A pronunciation start instruction is output (step Q4). Sound source circuit 8
When given an instruction to start sound generation, it generates a musical tone signal of the transferred scale number, and generates the corresponding musical tone via the D/A converter 9 and the sound generation circuit 10. At the same time as this musical tone is generated, the counter starts counting the clock (step Q5), and it is checked whether the clock count matches the gate time G (step Q6). The clock used to measure the gate time G, that is, the sounding time, is the clock set as the tempo T of the note in step Q2, as described above. When the count number counts gate time G, the sound source circuit 8
A sound generation stop instruction is output to (step Q7) to stop the sound generation of the musical tone being generated.

Next, it is checked whether the counter has counted the step time S (step Q8), and when the counter has counted the step time S, it is determined that the time corresponding to the note length has elapsed, and the variable specifying the address is i
is set to (i+5) and a counter is set to 0 (step Q9). With the above process, the sound generation process for one note is completed, and it is checked whether there is data after the address set in step Q9, and whether there is any note information that has not yet been sounded in RAM3 ( Step Q10).

If there is data after address (i+1), it is determined that there is note information that has not yet been sounded in RAM3, and the process returns to step Q2, where the clock is set to a value corresponding to the tempo T of the address set in step Q9. Set. Similarly, each note is sounded while counting the sounding time based on the clock set for each note, and when the sounding is completed, the note length is counted. In this way, as the clock for counting the sound duration and note length of each note, a clock with a value corresponding to the tempo T set in the time signature setting process described above is used, so the time signature setting process automatically The step time and gate time that have been corrected to values that can be recognized by the performance device 1 can be corrected back to the step time and gate time that were inputted in real time, and automatic performance can be performed.

That is, in the time signature setting process, the step time and gate time inputted in real time are corrected to step times and gate times that can be recognized by the automatic performance device 1, and are stored in the RAM 3.
The step time and gate time stored in the RAM 3 after this correction are read out as they are, and the reference clock tc
In this case, the tempo Tt during automatic performance is equal to the base time Ts, as shown in the following equation, and unlike the tempo Tr during real-time input, the performance lacks musicality. Tt=60/(St×tc)=60/(St×
tc)=Ts≠Tr Therefore, in order to make the tempo Tt of automatic performance the same as the tempo Tr during real-time input, the tempo T stored in RAM 3 as correction information in the time signature setting process is used as a clock for each note to be played. We are hiring.

That is, if the clock for automatic performance is tc2, and the step time corrected by the time signature setting process is S, then the tempo Tt during automatic performance will be the tempo Tr during real-time input when the following relationship holds. Therefore, it is possible to perform in the same state as when inputting in real time. tc2×S=tc×S1 It can be seen from the following equation that the tempo Tt during automatic performance at this time is equal to the tempo Tr during real-time input. Tt=60/(S×tc2)=60/(S×S
1×tc/S) =60/(S1×tc
)=Tr And tc2 used here is tc2
=(S1×tc)/S=(S2×tc)/St,
If only S2 is known, tc2 can be found. Therefore, in the time signature setting process, the tempo T is T=60b.
/(S2×tc) is calculated and written into RAM3 for each note.

Therefore, R as a note information storage means
While reducing the storage capacity of the AM3, each note can be played back in the state in which the user inputs it in real time, and automatic performance that is natural and rich in musicality can be performed. In the above embodiment, in the time signature setting process, the step time and gate time as musical note information are rewritten from the values at the time of real-time input to values suitable for musical score display, but the present invention is not limited to this. For example, you can set up a memory area that stores only the tempo data for each note, store the step time and gate time as they are at the time of real-time input, and store the tempo data for each note in this memory area. During the score display process, the step time and gate time at the time of real-time input may be calculated and stored as values of correction information for correcting them to values suitable for displaying the score.

Furthermore, in the above musical score output process, the musical score is displayed and output on the display unit 5, but it may also be recorded and output on paper or the like.

[0045]

Effects of the Invention According to the invention as claimed in claim 1, incorrect note information inputted by a human being by playing using the note information input means can be corrected to accurate note information. It is possible to output musical scores. In addition, the corrected note information can be converted to the note information at the time of performance input and generated as a musical sound, reducing the storage capacity of the storage means for storing note information, while allowing automatic performance that is natural and rich in musicality. can be done.

According to the invention as claimed in claim 2, since it is possible to input the music information to be played automatically using the keyboard, the music information for the music to be played automatically can be input in a natural state, and the music can be played naturally. It is possible to perform rich automatic performances.

According to the third aspect of the invention, since the musical scale, note length, gate time as the generation time of each note, and velocity data for controlling the intensity of the sound can be input as the musical note information, the musical note information can be inputted as the musical note information. It is possible to memorize more detailed information, and it is possible to perform automatic performances that are more natural and rich in musicality.

In the invention as set forth in claim 4, the note length of the note information stored in the note information storage means can be corrected based on the time signature information stored in the time signature storage means, which is important for unique performances. It is possible to appropriately correct the note length, which plays an important role, to output more accurate musical score information, and to perform automatic performances that are more natural and rich in musicality.

According to the fifth aspect of the invention, the note length and gate time of the note information stored in the note information storage means can be corrected based on the time signature information stored in the time signature storage means, so that A large amount of music information can be corrected, a more accurate musical score can be output, and automatic performance can be performed that is more natural and rich in musicality.

According to the sixth aspect of the invention, the time signature input means allows the user to input the generation start timing of the tempo clock for measuring the note length of each note in accordance with the time signature interval. By appropriately inputting time signature input means, the musical note information can be made more accurate, and the musical score can be output more accurately, and the music can be changed to a song with a melody that matches the user's preference. This allows users to freely play songs that suit their tastes even more.

[Brief explanation of drawings]

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

FIG. 2 is a diagram showing a memory map formed in the RAM of FIG. 1;

FIG. 3 is a diagram showing an example of a musical score of a song for automatic performance.

FIG. 4 is a diagram showing the scale number, step time, gate time, and velocity of the musical score in FIG. 4;

FIG. 5 is a flowchart showing the process of inputting notes of a song for automatic performance.

FIG. 6 is a flowchart showing time signature setting processing.

FIG. 7 is a flowchart showing the step expansion process of FIG. 6;

FIG. 8 is a flowchart showing tempo calculation processing in the step development processing of FIG. 7;

FIG. 9 is a flowchart showing tempo storage processing in the step expansion processing of FIG. 7;

FIG. 10 is a flowchart showing step time calculation/storage processing in the step expansion processing of FIG. 7;

FIG. 11 is a flowchart showing gate time calculation/storage processing in the step expansion processing of FIG. 7;

FIG. 12 is an explanatory diagram of time signature setting processing.

FIG. 13 is a flowchart showing musical score display processing.

FIG. 14 is a flowchart showing automatic performance processing.

FIG. 15 is a memory map of a memory that stores conventional automatic performance note information.

[Explanation of symbols]

1 Automatic performance device 2 CPU 3 RAM 4 ROM 5 Display section 6 Clock generation circuit 7 Keyboard 8 Switch part 9 Sound source circuit 10 D/A converter 11 Sound production circuit

Claims (6)

[Claims] 1. Note information input means for inputting a series of note information constituting music information by playing using a performance operator, and sequentially storing each note information input from the note information input means. a note information storage means, a time signature input means for inputting the time signature of the music inputted by the note information input means, and correcting the note information stored in the note information storage means based on the time signature information input from the time signature input means. and a correction means for outputting correction information for converting the corrected note information into uncorrected note information; and a correction means for storing the corrected note information corrected by the correction means in the note information storage means. storage control means for rewriting and storing the note information and storing the correction information in the note information storage means for each note; and the note information and correction information in the note information storage means rewritten by the storage control means. and a musical score output means that outputs musical score information based on the musical note information of the musical note information storage means rewritten by the storage control means in a visually recognizable state. An automatic performance device featuring: 2. The automatic performance apparatus according to claim 1, wherein said note information input means is a keyboard. 3. The note information input means is capable of inputting, as the note information, a scale, a note length, a gate time as the time of occurrence of each note, and velocity data for controlling the intensity of the sound. An automatic performance device according to claim 1 or claim 2. 4. The correction means corrects the note length of the note information stored in the note information storage means based on the time signature information input from the time signature input means. An automatic performance device according to claim 2 or 3. 5. The correction means corrects the note length and gate time of the note information stored in the note information storage means based on the time signature information input from the time signature input means. 1. The automatic performance device according to claim 2 or 3. 6. The time signature input means inputs the generation start timing of a tempo clock for measuring the note length of each note corresponding to the time signature interval.
An automatic performance device according to claim 2, claim 3, claim 4, or claim 5.