JP2017173383A - Velocity correction device, velocity correction method, program, and electric musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable even a musical instrument beginner to play fast-tempo music or phrases with uniform strength of sound by performing control so that variance in velocity value of successive keying is reduced with respect to velocity control technique of an electronic musical instrument.SOLUTION: After a velocity value of current keying is calculated (velocity value calculation process), a time difference between the current keying and last keying is calculated (time difference calculation process). Then when the time difference is short as compared with a predetermined maximum time, a velocity variation threshold corresponding to the time difference is calculated (velocity variation threshold calculation process). At this time, when the degree of variation in velocity value between the current keying and the last keying is large as compared with the velocity variation threshold and small as compared with a maximum value of the predetermined degree of velocity variation, the velocity value of the current keying is corrected and output (velocity correction process) such that the degree of variation is equal to the velocity variation threshold.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a velocity correction device, a velocity correction method, a program, and an electronic musical instrument.

  Conventionally, electronic musical instruments such as an electronic piano and an electronic keyboard having a velocity detection function are known. These electronic musical instruments have a set of multiple contacts and sensors for each key of the keyboard, and calculate the velocity value corresponding to the key pressing speed from the time difference detected by the sensor when the key is pressed. The musical sound is produced with the intensity corresponding to the velocity value and the pitch corresponding to the pressed key. If the key is played weakly (slowly), it will be small, and if it is played strongly (fastly), the musical sound will be pronounced, so that the performer can express the performance more abundantly.

  Here, the electronic musical instrument with velocity as described above can express rich performances, but if you are a beginner, if you play a song or phrase with a fast tempo, you will not be able to move your finger well and the volume will unintentionally vary. It may become

  The following are known as conventional techniques for solving such problems (for example, the technique described in Patent Document 1). The musical sound to be generated is controlled based not only on the velocity value when the performance operator is operated but also on the velocity value calculated by taking into account the velocity values existing at different points in time. More specifically, the result of mixing the velocity value when the performance operator is operated and the velocity value when the sound is played immediately before, for example, in a ratio of 7 to 1, is set as the current velocity value. As a result, in the velocity value of the sound to be generated, the previous velocity value included at a rate of 1/8 suppresses unnecessary fluctuations in the velocity value due to the difference in performance speed and pressure, and the rate of 7/8. This makes it possible to reflect the performance operation intended by the performer in the current velocity value.

Japanese Patent Laid-Open No. 4-194922

  This prior art is based on the premise that the velocity value acquired by this performance reflects the state of the previous performance, particularly the previous performance. For this reason, when determining the velocity value obtained by the current performance, the velocity value obtained by the previous performance is reflected.

  However, the degree of reflection is always constant, and even if the performer intentionally performs a performance that does not reflect the immediately preceding velocity, the velocity of the immediately preceding performance is reflected.

  Further, it is known that in the performance of normal music, when the time difference between the timing of the previous performance and the timing of the current performance is short, the degree of fluctuation in velocity is smaller than when the time difference is long. In particular, in the case where the keyboard is struck repeatedly in order to play a fast-tempo song or phrase, it is preferable that the velocity value between successive key presses be as constant as possible. In addition, it is desirable that the velocity value be within a range that is almost constant when the speed of repeated hits is high and may be slightly wide when it is slow. However, as described above, in the conventional technique in which the previous velocity value and the current velocity value are simply mixed at a certain ratio, it is not possible to control the degree of velocity fluctuation according to the performance interval. was there.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a velocity correction device, a velocity correction method, a program, and an electronic musical instrument that can reduce only unintended variation of a velocity player that is continuously input by a performance. .

  In one example, a velocity acquisition process for acquiring a velocity value every time a sound generation instruction is input, a timing of input of a first sound generation instruction, and a second sound generation instruction before the input of the first sound generation instruction. A time difference acquisition process for acquiring a time difference from the input timing; and a case where the acquired time difference does not exceed the first time difference and the velocity value acquired by the input of the first sound generation instruction and the second time difference When the difference value from the velocity value acquired by the input of the pronunciation instruction is equal to or larger than the fluctuation threshold value of the first differential velocity, the velocity value acquired by the input of the first pronunciation instruction is used as the second pronunciation. A velocity correction process for correcting the velocity based on the velocity value acquired by inputting the instruction, and a processing unit that executes the velocity correction process.

  According to the present invention, by performing control so that a player's unintentional variation in the velocity values of consecutive key presses is reduced, even a beginner musical instrument can perform with a strong tempo of music and phrases with a strong and weak sound. Is possible.

It is operation | movement explanatory drawing of this embodiment when the velocity value of this key depression is larger than the velocity value of the last key depression. It is operation | movement explanatory drawing of this embodiment when the velocity value of this key depression is smaller than the velocity value of the last key depression. It is operation | movement explanatory drawing of this embodiment showing the change state of the velocity fluctuation | variation threshold value D according to the time difference t of key depression with the last time and this time. It is a figure which shows the hardware structural example of embodiment of an electronic musical instrument. It is a flowchart which shows the example of a main process. It is a flowchart which shows the example of a keyboard process. It is a flowchart which shows the example of a timer process. 6 is a flowchart illustrating an example of conversion processing 1; 10 is a flowchart illustrating an example of conversion processing 2; In the conversion process 3, it is operation | movement explanatory drawing when the time difference t of the key press of the last time and this time is below predetermined 2nd time IN_TIME.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the present embodiment, the electronic musical instrument controls the velocity of a musical sound that is generated based on a key press (pronunciation instruction) generated by a performance operation of the performer.

  In this embodiment, every time a sound generation instruction is input, a velocity corresponding to the input of the sound generation instruction is acquired (velocity acquisition processing), and the sound generation timing before the input of the current sound generation instruction is input. The time difference from the input timing of the instruction is acquired (time difference acquisition process). If the acquired time difference does not exceed a predetermined first time difference, the difference velocity between the velocity value acquired by inputting the current sounding instruction and the velocity value acquired by inputting the previous sounding instruction When the value is within the range of the differential velocity determined based on the predetermined upper limit velocity value and lower limit velocity value, the velocity value obtained by inputting the current sound generation instruction is set to the previous sound generation instruction. Correction is made based on the velocity value acquired by input (velocity correction processing).

  1 to 3 are operation explanatory views of the present embodiment. 1 to 3, the vertical axis represents the velocity value, and the horizontal axis represents the passage of time associated with the key depression. Vp represents the velocity value of the previous key depression, and Vn represents the velocity value of the current key depression.

  1A, 1B, 1C, and 1D show a case where the velocity value Vn of the current key depression is larger than the velocity value Vp of the previous key depression. FIG. 1A shows that the time difference t between the previous key press and the current key press is smaller than a predetermined first time MAX_TIME, and the difference between the current key press velocity value Vn and the previous key press velocity value Vp. Is greater than the maximum value Dmax of the velocity fluctuation threshold. In this case, the velocity value Vn of the current key depression is output as it is without being corrected.

  FIG. 1B shows a case where the difference between the velocity value Vn of the current key depression and the velocity value Vp of the previous key depression is equal to or smaller than the maximum velocity variation threshold value Dmax and equal to or smaller than the velocity variation threshold value D. Also in this case, the velocity value Vn of the current key depression is output as it is without being corrected.

  FIG. 1C shows a case where the difference between the velocity value Vn of the current key depression and the velocity value Vp of the previous key depression is equal to or smaller than the maximum velocity variation threshold value Dmax and greater than the velocity variation threshold value D. Also in this case, the velocity value Vn ′ of the current key depression is a value obtained by adding the velocity fluctuation threshold D to the velocity value Vp of the previous key depression.

  FIG. 1 (d) shows a case where the time difference t between key presses of the previous time and the current time is equal to or greater than a predetermined first time MAX_TIME. In this case, regardless of the difference between the velocity value Vn of the current key depression and the velocity value Vp of the previous key depression, the velocity value Vn of the current key depression is output as it is without modification.

  FIGS. 2A, 2B, 2C, and 2D show cases where the velocity value Vn of the current key depression is smaller than the velocity value Vp of the previous key depression.

  FIG. 2A shows that the time difference t between the previous key press and the current key press is smaller than a predetermined first time MAX_TIME, and the difference between the current key press velocity value Vn and the previous key press velocity value Vp. 2 is larger than the maximum value Dmax of the velocity fluctuation threshold, and FIG. 2B shows that the difference between the velocity value Vn of the current key depression and the velocity value Vp of the previous key depression is the maximum velocity fluctuation threshold value. A case where it is equal to or smaller than Dmax and equal to or smaller than a velocity fluctuation threshold D is shown. Further, in FIG. 2D, in any of these cases, the velocity value Vn of the current key depression is output as it is without being corrected.

  FIG. 2C shows a case where the difference between the velocity value Vn of the current key depression and the velocity value Vp of the previous key depression is equal to or smaller than the maximum velocity variation threshold value Dmax and larger than the velocity variation threshold value D. In this case, the velocity value Vn ″ of the current key depression is a value obtained by subtracting the velocity fluctuation threshold D from the velocity value Vp of the previous key depression.

  FIG. 2D shows a case where the time difference t between key presses of the previous time and this time is equal to or greater than a predetermined first time MAX_TIME. In this case, regardless of the difference between the velocity value Vn of the current key depression and the velocity value Vp of the previous key depression, the velocity value Vn of the current key depression is output as it is without modification.

  FIG. 3 is a diagram illustrating a change state of the velocity fluctuation threshold D in accordance with a time difference between key presses of the previous time and the current time.

  FIG. 3A shows a case where the time difference T is small, and FIG. 3B shows a case where the time difference T ′ is large. The velocity fluctuation threshold D is larger in the case of FIG. 3B than in the case of FIG. This means that the velocity value of the current key press becomes less susceptible to the influence of the velocity value of the previous key press as the key press interval between the previous key and the current key increases.

By such processing, the velocity value at the time of repeated hitting is made uniform so that the player's unintentional variation in the velocity value of consecutive key presses (repetitive hitting) is reduced. As a result, even beginners of musical instruments can perform with a strong tempo of a song or phrase with a fast tempo.

  FIG. 4 is a diagram illustrating a hardware configuration example of an embodiment of the electronic musical instrument. In FIG. 4, an electronic musical instrument 100 is realized as an electronic piano, for example, and includes a CPU (Central Processing Unit) 201, a program ROM (Read Only Memory) 202, a RAM (Random Access Memory) 203, a keyboard unit 204, a switch unit 205, And a sound source 206, which are connected to each other by a system bus 208. The output of the sound source 206 is input to the sound system 207.

  The CPU 201 executes the control operation of the electronic musical instrument 100 of FIG. 4 by executing the control program stored in the program ROM 202 while using the work RAM 203 as a working memory.

  The keyboard unit 204 detects the operation of pressing or releasing each key by the performer, detects the key pressing speed as velocity, and notifies the CPU 201 of the sound generation instruction / mute instruction and velocity.

  The switch unit 205 detects the operation of various switches by the performer and notifies the CPU 201 of the operation.

  The sound source 206 generates digital musical sound waveform data based on the sound generation instruction data input from the CPU 201 while controlling the velocity, and outputs it to the sound system 207. The sound system 207 converts the digital musical sound waveform data input from the sound source 206 into an analog musical sound waveform signal, amplifies the analog musical sound waveform signal with a built-in amplifier, and emits the sound from a built-in speaker.

  The electronic musical instrument 100 according to the present embodiment is realized by the CPU 201 executing a control program having functions realized by the flowcharts of FIGS. The control program may be recorded in a portable recording medium (not shown) and distributed, or may be acquired from a network through a communication interface (not shown) and stored in the program ROM 202.

  FIG. 5 is a flowchart showing a processing example of a main process realized as an operation in which the CPU 201 in FIG. 4 executes a control program stored in the program ROM 202. When a power switch (not shown) in the switch unit 205 in FIG. 4 is turned on, the CPU 201 starts a main process exemplified by the flowchart in FIG.

  First, the CPU 201 executes an initialization process, and initializes a variable group in the work RAM 203 (step S301).

  Thereafter, the CPU 201 repeatedly executes the keyboard process in step S302 and the other processes in step S303. In step S303, fetching of the operation state of the switch unit 205 in FIG. 4 and processing corresponding thereto are executed.

  FIG. 6 is a flowchart showing an example of the keyboard process in step S302 of FIG.

  First, the CPU 201 scans the key depression or key release state of the keyboard 204 in FIG. 6 (step S401).

  As a result of the scan in step S 401, if a key depression by the performer occurs, the CPU 201 obtains a velocity value velocity together with the note number of the key depressed, and the velocity of the current key depression in the work RAM 203. The value is stored in the variable Vn that holds the value (step S402).

  Next, the CPU 201 refers to the value of the variable t that holds the time from the previous key depression in the work RAM 203. The CPU 201 clears the value of the variable t after fetching the value of the variable t every time a key is pressed. After that, the CPU 201 is based on a tempo designated by the performer in the switch unit 205 and an output of a hardware timer (not shown) in the CPU 201, in particular, a unit called “tick” obtained by dividing the quarter note with an accuracy of 480, Generate an interrupt. By this interruption, the timer process illustrated in the flowchart of FIG. 7 is executed. As a result, the CPU 201 increments the value of the variable t by +1 with the resolution of tick (step S501 in FIG. 7). As a result, the variable t holds the elapsed time from the previous key press occurrence. Returning to the description of FIG. 6, the CPU 201 refers to the value of the variable t, and as a result, the value of the time difference t between the current key press and the previous key press is stored in the program ROM 202 in a first predetermined time. It is determined whether it is shorter than MAX_TIME (step S403).

  If the determination in step S403 is YES, the CPU 201 further determines whether or not the value of the velocity value Vp of the previous key press held in the work RAM 203 is 0 (step S404).

  If the determination in step S404 is NO, the CPU 201 executes a conversion process for correcting the current velocity value (step S405). Thereafter, the CPU 201 proceeds to step S406.

  If the determination in step S403 is NO or if the determination in step S404 is YES, the CPU 201 proceeds to step S406 without executing step S405. If the determination in step S403 is NO, the value of the time difference t between the current key press and the previous key press is equal to or greater than the first time MAX_TIME. In this case, the CPU 201 continuously presses the key. It is determined that the key is not a key (repeated), and the sound generation instruction is performed with the current key velocity value Vn as it is. If the determination in step S404 is YES, the velocity value of the previous key press in the work RAM 203 becomes 0 by the first key press after activation. In this case as well, the CPU 201 continues the key press (continuous key press). ), The sound generation instruction is performed with the velocity value Vn of the current key depression as it is.

  In step S406, the CPU 201 stores the current key pressing velocity value in a variable Vp in the work RAM 203 that holds the previous key pressing velocity value.

  Thereafter, the CPU 201 initializes the value of the variable t in the work RAM 203 to 0 (step S407).

  Finally, the CPU 201 designates the velocity value of the current key press held in the variable Vn in the work RAM 203 and the note number separately acquired from the keyboard 204 in FIG. 4 to the sound source 206 in FIG. A pronunciation instruction is given (step S408). With the above operation, the CPU 201 ends the keyboard process in step S302 of FIG. 5 shown in the flowchart of FIG.

  Next, a first embodiment (hereinafter referred to as “conversion process 1”) of the conversion process of FIG. 6 will be described. Here, as a first example of processing for calculating a velocity fluctuation threshold corresponding to a time difference, a positive value is added to the time difference t obtained as the value of the variable t in the work RAM 203 as shown in the following equation (1). A value obtained by adding the second coefficient β, which is a positive value, to the result of multiplication by the first coefficient α is calculated as the velocity fluctuation threshold value.

    D = F (t) = α × t + β (α> 0, β> 0) (1)

  In this example, the velocity fluctuation threshold D decreases as the key pressing interval decreases, and the current velocity value approaches the previous velocity value. The longer the time difference t, the slower the repeated hitting, and the shorter the time difference t, the faster the repeated hitting.

  Next, in the conversion process 1, when the time difference t is shorter than the predetermined maximum time MAX_TIME (see step S403 in FIG. 6 described above), the velocity value Vn of the current key depression and the velocity value Vp of the previous key depression. The absolute value | Vn−Vp | When the absolute value | Vn−Vp | of the difference is larger than the velocity fluctuation threshold D calculated by the equation (1) and smaller than the maximum value Dmax of the velocity fluctuation degree, the absolute difference The velocity value Vn of the current key depression is corrected and output so that the value | Vn−Vp | becomes equal to the velocity fluctuation threshold D. That is, the velocity value is converted under the following conditions.

D <| Vn−Vp | <Dmax (2)
Then

    | Vn−Vp | = D (3)

  If the absolute value of the difference | Vn−Vp | is equal to or less than the velocity fluctuation threshold D in the condition determination of the above equation (2), the player performs the current key pressing with the same velocity value as the previous key pressing. The current velocity value Vn is output without being corrected. If the absolute value of the difference | Vn−Vp | is equal to or greater than the maximum value Dmax of the velocity fluctuation degree, it is considered that the player has changed the velocity value consciously, and the current velocity value Vn is not corrected as it is. Is output.

  Here, when Vn ≧ Vp, the equation (2) is rewritten as the following equation.

D <Vn−Vp <Dmax
∴Vp + D <Vn <Vp + Dmax (4)

  If the above equation (4) holds, the current velocity value Vn is corrected by the following equation from equation (3).

    Vn = Vp + D (5)

  On the other hand, when Vp> Vn, the equation (2) is rewritten as the following equation.

D <Vp−Vn <Dmax
∴Vp−Dmax <Vn <Vp−D (6)

  If the above equation (6) holds, the current velocity value Vn is corrected by the following equation from equation (3).

    Vn = Vp-D (7)

  FIG. 8 is a flowchart illustrating an example of conversion processing 1 which is a detailed example of the conversion processing in step S405 of FIG.

  First, the CPU 201 calculates the velocity fluctuation threshold D by the above-described equation (1) and stores it in the variable D of the same name in the work RAM 203 (step S601).

  Next, the CPU 201 determines whether or not the previous key pressing velocity value Vp is larger than the current key pressing velocity value Vn, that is, whether or not Vp> Vn (step S602).

  If the determination in step S602 is NO, that is, if Vn ≧ Vp, the CPU 201 determines whether or not the condition of the above-described expression (4) is satisfied (step S603).

  If the determination in step S603 is YES, the CPU 201 corrects the velocity value Vn of the current key depression by the above-described equation (5) (step S604).

  If the determination in step S603 is NO, the CPU 201 skips the process in step S604 and leaves the current key-pressed velocity value Vn unchanged.

  After the above processing, the CPU 201 ends the conversion processing in step S405 of FIG. 6 exemplified by the flowchart of FIG.

  On the other hand, if the determination in step S602 is YES, that is, if Vp> Vn, the CPU 201 determines whether or not the condition of equation (6) described above is satisfied (step S605).

  If the determination in step S605 is YES, the CPU 201 corrects the velocity value Vn of the current key depression by the above-described equation (7) (step S606).

  If the determination in step S605 is NO, the CPU 201 skips the process in step S606 and leaves the current key pressing velocity value Vn unchanged.

  After the above processing, the CPU 201 ends the conversion processing in step S305 in FIG. 6 illustrated by the flowchart in FIG.

  Next, a second embodiment (hereinafter referred to as “conversion process 2”) of the conversion process of FIG. 6 will be described. Here, as a second example of the process for calculating the velocity fluctuation threshold according to the time difference, as shown in the following equation (8), the time difference t obtained as the value of the variable t in the work RAM 203 is set to a predetermined maximum time. A value obtained by dividing by MAX_TIME is calculated as the velocity fluctuation threshold A.

    A = F (t) = t / MAX_TIME (8)

  Also in the second example, as in the case of the first example, the velocity fluctuation threshold A decreases as the key pressing interval decreases, and the current velocity value approaches the previous velocity value. The longer the time difference t, the slower the repeated hitting, and the shorter the time difference t, the faster the repeated hitting.

  Next, in the conversion process 2, when the time difference t is shorter than the predetermined maximum time MAX_TIME (see step S303 in FIG. 6 described above), the current key pressing velocity value Vn and the previous key pressing velocity value Vp. The variation ratio | Vn−Vp | / Vp of the absolute value | Vn−Vp | of the difference between the absolute value | Vn−Vp | and the velocity value Vp of the previous key depression is calculated as the variation degree. When the fluctuation ratio | Vn−Vp | / Vp is larger than the velocity fluctuation threshold A calculated by the equation (8) and smaller than the maximum value Amax of the velocity fluctuation degree, the fluctuation ratio | The velocity value Vn of the current key depression is corrected and outputted so that Vn−Vp | / Vp becomes equal to the velocity fluctuation threshold A. That is, the velocity value is converted under the following conditions.

A <| Vn−Vp | / Vp <Amax (9)
Then

  | Vn−Vp | / Vp = A (10)

  By judging the condition as in the above equation (9), it is possible to change the threshold judgment standard for making the velocity value close to constant by repeated hitting based not only on the velocity value difference value but also on the velocity value itself. .

  If the variation ratio | Vn−Vp | / Vp is equal to or less than the velocity variation threshold A in the condition determination of the above equation (9), the player performs the current key depression with the same velocity value as the previous key depression. The current velocity value Vn is output without being corrected. Also, if the difference fluctuation ratio | Vn−Vp | / Vp is equal to or greater than the maximum velocity fluctuation degree Amax, it is considered that the player has changed the velocity value consciously, and the current velocity value Vn is corrected as it is. Is output without any changes.

  Here, when Vn ≧ Vp, the equation (9) is rewritten as the following equation.

A <Vn−Vp / Vp <Amax
∴AVp + Vp <Vn <AmaxVp + Vp
∴ (1 + A) Vp <Vn <(1 + Amax) Vp (11)

  If the above equation (11) is established, the current velocity value Vn is corrected by the following equation from the equation (10).

(Vn−Vp) / Vp = A
∴Vn−Vp = AVp
∴Vn = AVp + Vp
∴Vn = (1 + A) Vp (12)

  On the other hand, when Vp> Vn, the equation (9) is rewritten as the following equation.

A <Vp−Vn / Vp <Amax
∴AVp−Vp <−Vn <AmaxVp−Vp
∴Vp−AmaxVp <Vn <Vp−AVp
∴ (1-Amax) Vp <Vn <(1-A) Vp (13)

  If the above expression (13) is established, the current velocity value Vn is corrected by the following expression from the expression (10).

(Vp−Vn) / Vp = A
∴Vp−Vn = AVp
∴Vn = Vp-AVp
∴Vn = (1-A) Vp (14)

  FIG. 9 is a flowchart illustrating an example of the conversion process 2, which is a detailed example of the conversion process in step S305 of FIG.

  First, the CPU 201 calculates the velocity fluctuation threshold A by the above-described equation (8) and stores it in the variable D of the same name in the work RAM 203 (step S701).

  Next, the CPU 201 determines whether or not the velocity value Vp of the previous key depression is larger than the velocity value Vn of the current key depression, that is, whether or not Vp> Vn (step S702).

  If the determination in step S702 is NO, that is, if Vn ≧ Vp, the CPU 201 determines whether or not the condition of the above-described expression (11) is satisfied (step S703).

  If the determination in step S703 is YES, the CPU 201 corrects the velocity value Vn of the current key depression by the above-described equation (12) (step S704).

  If the determination in step S703 is no, the CPU 201 skips the process in step S704 and leaves the current key pressing velocity value Vn unchanged.

  After the above processing, the CPU 201 ends the conversion processing in step S305 of FIG. 6 exemplified by the flowchart of FIG.

  On the other hand, if the determination in step S702 is YES, that is, if Vp> Vn, the CPU 201 determines whether or not the condition of equation (13) described above is satisfied (step S705).

  If the determination in step S705 is YES, the CPU 201 corrects the velocity value Vn of the current key depression by the above-described equation (14) (step S706).

  If the determination in step S705 is NO, the CPU 201 skips the process in step S706 and leaves the current key pressing velocity value Vn unchanged.

  After the above processing, the CPU 201 ends the conversion processing in step S305 of FIG. 6 exemplified by the flowchart of FIG.

  Next, a third embodiment of conversion processing (hereinafter referred to as “conversion processing 3”) will be described. In the performance, for example, three sounds may be pressed simultaneously. In the case where the current key press is repeated after such simultaneous key press, the velocity value of the current key press is the velocity value of, for example, three-tone key presses that were simultaneously pressed. It is desirable to be corrected based on Also, for example, three sounds that are simultaneously depressed, it is desirable that their velocity values are not modified.

  Therefore, in the conversion process 3, first, the simultaneous sounding state is detected. First, when the time difference t between the previous key press and the current key press is shorter than the predetermined minimum time MIN_TIME shorter than the predetermined maximum time MAX_TIME, the previous key press and the current key press are pressed almost simultaneously. It is determined that In this case, the above-described velocity value correction process is not executed, and the simultaneous sounding state is recorded in the current key press and the previous key press (simultaneous sound recording process). Specifically, for example, the CPU 201 in FIG. 4 stores, in the work RAM 203, a value 2 indicating that two sounds are simultaneously generated in a variable that holds the number of simultaneous sounds. Further, if the same condition is satisfied even at the next key depression, the CPU 201 increments the value of the variable holding the number of simultaneous sounds in the work RAM 203 by +1 with respect to the value 2, and the three sounds are simultaneously sounded. The value 3 indicating.

  FIG. 10 shows a case where the time difference t between key presses of the previous time and this time is equal to or less than a predetermined second time IN_TIME. In this case, as shown in FIG. 10A, the velocity value Vn of the current key press is not corrected regardless of the difference between the velocity value Vn of the current key press and the velocity value Vp of the previous key press. Output as is.

  Thereafter, when the time difference t is shorter than the predetermined maximum time MAX_TIME but is longer than the predetermined minimum time MIN_TIME, it is determined that repeated hits have been made following the previous simultaneous sounding. In this case, the velocity value obtained by calculating from the velocity values of the respective key presses in which the simultaneous sounding state is continuously recorded before the previous key press is set as the velocity value of the previous key press. For example, if the value of the variable that holds the number of simultaneous sounds in the work RAM 203 is 3, a new velocity value is calculated from the velocity values for the past three sounds held in the work RAM 203, for example. For example, the average value of the velocity values that are simultaneously sounded is calculated. Alternatively, the median value of the velocity values that are simultaneously sounded is calculated. The new velocity value calculated in this way is used as the velocity value of the previous key depression.

  FIG. 10B shows a case where a velocity value Vn ′ by a new key press is acquired when the second time IN_TIME or more has elapsed from the state of FIG. When this velocity value Vn ′ is the velocity value by the current key depression, the average value of the velocity value Vn of the current key depression and the velocity value Vp of the previous key depression is regarded as the velocity value of the previous key depression. Then, the velocity value Vn ′ of the key depression this time is corrected.

  The subsequent operations are the same as those of the conversion process 1 or 2 described above.

  In this way, in the conversion process 3, it is possible to appropriately correct the velocity value at the time of repeated hitting even when simultaneous sound is generated by simultaneously pressing a plurality of keys.

Regarding the above embodiment, the following additional notes are disclosed.
(Appendix 1)
A velocity acquisition process for acquiring a velocity value every time a pronunciation instruction is input;
A time difference acquisition process for acquiring a time difference between the input timing of the first sound generation instruction and the input timing of the second sound generation instruction before the input of the first sound generation instruction;
The difference value between the velocity value acquired by the input of the first sounding instruction and the velocity value acquired by the input of the second sounding instruction when the acquired time difference does not exceed the first time difference Is equal to or greater than the fluctuation threshold of the first differential velocity, the velocity value acquired by the input of the first sounding instruction is corrected based on the velocity value acquired by the input of the second sounding instruction. Velocity correction processing,
A processing unit for executing
Velocity correction device.
(Appendix 2)
The processing unit, in the velocity correction process, when the acquired time difference does not exceed the first time difference, when the acquired difference value is equal to or less than a fluctuation threshold of the first differential velocity, and the acquisition Additional processing 1 for executing the process of outputting the velocity value obtained by the input of the first sound generation instruction as it is in at least one of the cases where the obtained difference value is not less than the maximum variation threshold value of the first difference velocity The velocity correction device described in 1.
(Appendix 3)
In the velocity correction process, when the velocity value acquired by the input of the first sound generation instruction is larger than the velocity value acquired by the input of the second sound generation instruction, the processing unit performs the first sound generation. The velocity value acquired by inputting the instruction is corrected to a value obtained by adding the fluctuation threshold value of the first differential velocity to the velocity value acquired by inputting the second sounding instruction, while the first sounding instruction When the velocity value obtained by inputting the second sounding instruction is smaller than the velocity obtained by inputting the second sounding instruction, the velocity value obtained by inputting the first sounding instruction is set to the second sounding instruction. The supplementary note 1 or 2, wherein a process of correcting a value obtained by subtracting a fluctuation threshold value of the first differential velocity from a velocity acquired by input is performed. Velocity correction device.
(Appendix 4)
The processing unit further executes a velocity fluctuation threshold determination process for determining the fluctuation threshold based on the acquired time difference when the acquired time difference does not exceed the first time difference. 4. The velocity correcting device according to any one of 3 above.
(Appendix 5)
The velocity correction apparatus according to appendix 4, wherein the processing unit executes a process of acquiring a velocity fluctuation coefficient that decreases as the acquired time difference decreases in the velocity fluctuation threshold determination process.
(Appendix 6)
The velocity correction apparatus according to appendix 5, wherein the processing unit executes a process of multiplying the fluctuation threshold by the velocity fluctuation coefficient in the velocity fluctuation threshold determination process.
(Appendix 7)
The velocity correction apparatus according to appendix 5, wherein the processing unit executes a process of adding the velocity fluctuation threshold to the velocity fluctuation threshold in the velocity fluctuation threshold determination process.
(Appendix 8)
In the time difference acquisition process, the processing unit inputs a sounding instruction input before and immediately before the input of the first sounding instruction as the input timing of the second sounding instruction before the input of the first sounding instruction. The velocity correction apparatus according to any one of appendices 1 to 7, wherein the timing is acquired.
(Appendix 9)
The processing unit, in the velocity correction processing, when the acquired time difference is smaller than a predetermined second time difference, processing to output the velocity value acquired by inputting the first sound generation instruction as it is The velocity correction apparatus according to any one of appendices 1 to 8, which is executed.
(Appendix 10)
In the velocity correction process, the processing unit performs a process of outputting the velocity value obtained by the input of the first sound generation instruction as it is, and then performs a new time difference shorter than the predetermined second time difference. When a pronunciation instruction is input, the velocity value acquired by the input of the new pronunciation instruction is changed to the velocity value acquired by the input of the first pronunciation instruction and the input of the first pronunciation instruction. The velocity correction apparatus according to appendix 9, wherein a correction process is executed based on the velocity value acquired by inputting the second pronunciation instruction.
(Appendix 11)
In the velocity correction process, the processing unit obtains a velocity value acquired by inputting the new sounding instruction from a velocity value acquired by inputting the first sounding instruction and the input of the first sounding instruction. The velocity correction apparatus according to appendix 10, wherein a correction process is executed based on an average value with a velocity value acquired by inputting a previous second sound generation instruction.
(Appendix 12)
Velocity correction device
Every time a pronunciation instruction is input, the velocity is acquired,
Obtaining the time difference between the input timing of the first pronunciation instruction and the input timing of the second pronunciation instruction before the input of the first pronunciation instruction;
If the acquired time difference does not exceed the first time difference, the difference velocity value between the velocity value acquired by the input of the first sounding instruction and the velocity value acquired by the input of the second sounding instruction Is equal to or greater than the fluctuation threshold of the first differential velocity, the velocity value acquired by the input of the first sounding instruction is corrected based on the velocity value acquired by the input of the second sounding instruction. , Velocity correction method.
(Appendix 13)
In a computer used as a velocity correction device,
A velocity acquisition step for acquiring a velocity each time a pronunciation instruction is input;
A time difference acquisition step of acquiring a time difference between the input timing of the first sound generation instruction and the input timing of the second sound generation instruction before the input of the first sound generation instruction;
When the acquired time difference does not exceed the first time difference, a difference value between the velocity value acquired by the input of the first sounding instruction and the velocity value acquired by the input of the second sounding instruction is Velocity for correcting the velocity value acquired by the input of the first sounding instruction based on the velocity value acquired by the input of the second sounding instruction when the first differential velocity is not less than the fluctuation threshold value. Correction steps;
A program that executes
(Appendix 14)
The velocity correction device according to attachment 1,
A sound generation instruction unit that supplies a sound generation instruction to the velocity correction device;
A sound source that generates a musical sound based on the velocity value corrected by the velocity correcting device;
Electronic musical instrument with

100 Electronic musical instrument 201 CPU
202 Program ROM
203 Work RAM
204 Keyboard 205 Switch part 206 Sound source 207 Sound system

Claims (14)

A velocity acquisition process for acquiring a velocity value every time a pronunciation instruction is input;
A time difference acquisition process for acquiring a time difference between the input timing of the first sound generation instruction and the input timing of the second sound generation instruction before the input of the first sound generation instruction;
The difference value between the velocity value acquired by the input of the first sounding instruction and the velocity value acquired by the input of the second sounding instruction when the acquired time difference does not exceed the first time difference Is equal to or greater than the fluctuation threshold of the first differential velocity, the velocity value acquired by the input of the first sounding instruction is corrected based on the velocity value acquired by the input of the second sounding instruction. Velocity correction processing,
A processing unit for executing
Velocity correction device.   The processing unit, in the velocity correction process, when the acquired time difference does not exceed the first time difference, when the acquired difference value is equal to or less than a fluctuation threshold of the first differential velocity, and the acquisition The process of outputting the velocity value acquired by the input of the first sound generation instruction as it is is executed in at least one of the cases where the obtained difference value is not less than the maximum variation threshold value of the first difference velocity. The velocity correction apparatus according to 1.   In the velocity correction process, when the velocity value acquired by the input of the first sound generation instruction is larger than the velocity value acquired by the input of the second sound generation instruction, the processing unit performs the first sound generation. The velocity value acquired by inputting the instruction is corrected to a value obtained by adding the fluctuation threshold value of the first differential velocity to the velocity value acquired by inputting the second sounding instruction, while the first sounding instruction When the velocity value obtained by inputting the second sounding instruction is smaller than the velocity obtained by inputting the second sounding instruction, the velocity value obtained by inputting the first sounding instruction is set to the second sounding instruction. 3. The process according to claim 1, wherein a process of correcting a value obtained by subtracting a fluctuation threshold value of the first differential velocity from a velocity acquired by input is executed. Velocity correction device.   The processing unit further executes a velocity fluctuation threshold determination process for determining the fluctuation threshold based on the acquired time difference when the acquired time difference does not exceed the first time difference. 4. The velocity correction device according to any one of items 1 to 3.   The velocity correction apparatus according to claim 4, wherein the processing unit executes a process of acquiring a velocity fluctuation coefficient that decreases in value as the acquired time difference decreases in the velocity fluctuation threshold determination process.   The velocity correction apparatus according to claim 5, wherein the processing unit executes a process of multiplying the fluctuation threshold by the velocity fluctuation coefficient in the velocity fluctuation threshold determination process.   The velocity correction apparatus according to claim 5, wherein the processing unit executes a process of adding the velocity fluctuation threshold to the velocity fluctuation threshold in the velocity fluctuation threshold determination process.   In the time difference acquisition process, the processing unit inputs a sounding instruction input before and immediately before the input of the first sounding instruction as the input timing of the second sounding instruction before the input of the first sounding instruction. The velocity correction apparatus according to claim 1, wherein the timing is acquired.   The processing unit, in the velocity correction processing, when the acquired time difference is smaller than a predetermined second time difference, processing to output the velocity value acquired by inputting the first sound generation instruction as it is The velocity correction device according to claim 1, wherein the velocity correction device is executed.   In the velocity correction process, the processing unit performs a process of outputting the velocity value obtained by the input of the first sound generation instruction as it is, and then performs a new time difference shorter than the predetermined second time difference. When a pronunciation instruction is input, the velocity value acquired by the input of the new pronunciation instruction is changed to the velocity value acquired by the input of the first pronunciation instruction and the input of the first pronunciation instruction. The velocity correction apparatus according to claim 9, wherein a correction process is executed based on a velocity value acquired by inputting the second pronunciation instruction.   In the velocity correction process, the processing unit obtains a velocity value acquired by inputting the new sounding instruction from a velocity value acquired by inputting the first sounding instruction and the input of the first sounding instruction. The velocity correction apparatus according to claim 10, wherein a correction process is executed based on an average value with a velocity value acquired by inputting a previous second sound generation instruction. Velocity correction device
Every time a pronunciation instruction is input, the velocity is acquired,
Obtaining the time difference between the input timing of the first pronunciation instruction and the input timing of the second pronunciation instruction before the input of the first pronunciation instruction;
If the acquired time difference does not exceed the first time difference, the difference velocity value between the velocity value acquired by the input of the first sounding instruction and the velocity value acquired by the input of the second sounding instruction Is equal to or greater than the fluctuation threshold of the first differential velocity, the velocity value acquired by the input of the first sounding instruction is corrected based on the velocity value acquired by the input of the second sounding instruction. , Velocity correction method. In a computer used as a velocity correction device,
A velocity acquisition step for acquiring a velocity each time a pronunciation instruction is input;
A time difference acquisition step of acquiring a time difference between the input timing of the first sound generation instruction and the input timing of the second sound generation instruction before the input of the first sound generation instruction;
When the acquired time difference does not exceed the first time difference, a difference value between the velocity value acquired by the input of the first sounding instruction and the velocity value acquired by the input of the second sounding instruction is Velocity for correcting the velocity value acquired by the input of the first sounding instruction based on the velocity value acquired by the input of the second sounding instruction when the first differential velocity is not less than the fluctuation threshold value. Correction steps;
A program that executes A velocity correcting device according to claim 1;
A sound generation instruction unit that supplies a sound generation instruction to the velocity correction device;
A sound source that generates a musical sound based on the velocity value corrected by the velocity correcting device;
Electronic musical instrument with