JP2746063B2 - Electronic musical instruments with pitch shift controls - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument provided with a pitch shift operator for temporarily changing the pitch of a sound to be produced.

[0002]

2. Description of the Related Art Conventionally, there is a so-called pitch shift operator which is generally provided in an electronic musical instrument and temporarily changes the pitch of generated musical sounds. For example, JP-A-62-18
In Japanese Patent No. 6293, the present applicant has proposed an electronic musical instrument provided with a pitch bend (shift) operator. According to this proposal, an operator configured so that pitch bend of a plurality of series of tone signals can be performed by a single pitch bend operator was proposed, and a wheel-like shape was formed as an example of such an operator. Pitch bend wheel (hereinafter,
A method of continuously changing the pitch of a musical tone by using a "wheel" is disclosed.

In Japanese Utility Model Laid-Open Publication No. 4-67697, the applicant of the present application has proposed a plurality of octave switches in which the pitch shift amount is fixed to octaves as a pitch shift operator, and performs pitch shift using the switches. Suggest a way.

[0004]

However, in order to maintain the pitch shift amount after shifting the generated musical tone to a desired pitch in the above-mentioned conventional pitch shift operation device, for example, the wheel, it is necessary to use the wheel. Has to be fixed by hand, and the hand that operates the wheel cannot be used for other operations during the pitch shift. In addition, when the pitch shift amount is held, even if the hand is moved even a little, the pitch changes, so it is very difficult to keep the pitch shift amount accurately.

In the octave switch, the pitch (octave) of the tone currently being generated cannot be changed, and the pitch is not changed until a new note-on is detected.
That is, the octave of the next musical tone cannot be changed until the next musical tone is generated. Therefore, there is a problem that the performer cannot change the pitch in real time to enhance the effect on the performance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can maintain a desired amount of pitch shift accurately, and can perform a pitch shift in real time from a desired point in time, thereby improving the effect on performance. It is an object of the present invention to provide an electronic musical instrument provided with a pitch shift operator that can perform the operation.

[0007]

According to a first aspect of the present invention, there is provided an electronic musical instrument having a pitch shift operator for shifting a pitch of a sound to be generated by a desired amount. , A first pitch control means for performing a pitch shift from a sound that is sounded when the pitch shift operator is operated, and a pitch shift from a newly sounded sound after operating the pitch shift operator. The present invention is characterized in that it comprises a second pitch control means for performing the operation and a selection means for selecting the first pitch control means and the second pitch control means.

According to a second aspect of the present invention, a pitch shift operator which is an on / off switch for shifting a pitch of a sound to be generated by a desired amount, and one of the first and second modes is provided. A mode designating means for designating, and when the first mode is designated, from the first on-event to the next on-event of the pitch shift operator, the sound is produced by a pitch amount corresponding to the operation amount. When the second mode is designated while the pitch of the sound to be shifted is shifted, from the ON event of the pitch shift operator to the corresponding OFF event, the sound is generated by the pitch amount corresponding to the operation amount. And control means for controlling so as to shift the pitch of the sound to be played.

[0009]

According to the configuration of the first aspect of the present invention, when the first pitch control means is selected by the selection means, the pitch shift operator is operated while the sound is being generated. , The pitch of the sound is shifted by a desired amount from the time of operation. On the other hand, when the second pitch control means is selected by the selection means, if a pitch shift operator is operated while a sound is being generated, a new sound is generated at a time after the operation. The pitch of the sound is shifted by a desired amount from the played sound.

According to the second aspect of the present invention, the first aspect is provided.
When the second mode is designated, the pitch of the sound to be generated is shifted by the pitch amount corresponding to the operation amount during the period from the first ON event to the next ON event of the pitch shift operator, and the second mode is set. When designated, the pitch of the sound to be produced is shifted by a pitch amount corresponding to the operation amount from the on event of the pitch shift operator to the corresponding off event.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of an electronic musical instrument provided with a pitch shift operator according to the present invention.

Referring to FIG. 1, an electronic musical instrument according to this embodiment includes a panel switch 1 including a pitch shift operator for shifting a pitch of a generated musical tone, and a keyboard 2 for designating a pitch of the musical tone.
A CPU 3 for controlling the entire apparatus, and a ROM 4 for storing programs executed by the CPU 3, table data, and the like.
And R for temporarily storing calculation results and various input information, etc.
It mainly comprises an AM 5, a sound source 6 for generating a tone signal, and a MIDI interface 7 for inputting and outputting MIDI codes.

The panel switch 1 is connected to a data address bus 9 via a switch interface 8 for detecting the pressed state of various switches. Similarly, the keyboard 2 also detects the pressed state of a key. It is connected to a data address bus 9 via a keyboard interface 10. The output side of the sound source 6 is connected to a digital signal processor (hereinafter, referred to as “DSP”) 11 for adding an envelope or a decorative sound to the sound output from the sound source 6 or changing the tone. , DSP1
1 is a digital-to-analog converter (hereinafter, referred to as "DAC") 12, which converts left and right channel digital tone signals output from the DSP 11 into analog signals.
The output sides of the DACs 12 and 13 are connected to speakers 14 and 15 for converting analog musical tone signals into musical tones, respectively. Further, the sound source 6 and the DSP 11
Are mutually connected to a data address bus 9 and
Control information such as pitch information and timbre information specified by the panel switch 1 and the keyboard 2 is exchanged via the data address bus 9.

Further, the data address bus 9 has C
The PU 3, the ROM 4, the RAM 5, and the MIDI interface 7 are connected to each other, and the output side of the MIDI interface 7 is connected to a MIDI terminal 16.

FIG. 2 is a diagram showing an example of an arrangement of main switches of the panel switch 1 of FIG.

In FIG. 1, only switches related to the present embodiment are shown. However, in practice, switches for changing a tone color and adding various decorative sounds are also provided. Have been. Panel switch 1 in FIG.
Is a pitch shift switch 21 for performing a pitch shift;
A mode switch 22 for changing the mode. Pitch shift switch 21, wheel 21 for performing the up switch 21 ₁ and the down switch 21 _2, continuously pitch shift within a pitch of a predetermined width for performing each up direction and the pitch shift down direction of the predetermined width _{And 3} .

Further, the mode switch 22, a hold switch 22 ₁ is constituted by a retriggerable switch 22 _2. Here, hold switch 22 _1, the hold mode, i.e., when the pitch shift was performed by the pitch shift switch 21, a switch for selecting a mode for holding the pitch shift amount, re-triggerable switch 22 _2, Li This switch is used to select a trigger mode, that is, a mode in which, when a pitch shift is performed, the pitch shift is performed from a currently sounding tone.

Furthermore, up switch 21 _1, down switch 21 ₂ in the upper portion of the hold switch 22 ₁ and Li trigger switch 22 ₂ are respectively LED23 is provided, the control operation of the switches is pressed, corresponding to the switches Is executed, the corresponding LED 23 is turned on.

Hereinafter, the control process executed by the CPU 3 will be described with reference to the flowcharts of FIGS.

FIG. 3 is a flowchart of a main routine executed by the CPU 3.

First, in step S1, various parameters are initialized. Next, in step S2, keyboard processing for determining a key code or the like in accordance with the key of the keyboard 2 pressed by the player is performed, and in step S3, the hold switch 22 ₁ of the panel switch 1 operated by the player and the retrigger performing panel process corresponding to the operation of the switch 22 ₂ and the like. further,
In step S4, a pitch shift process is performed in accordance with an instruction designated by the pitch shift switch 21 and the mode switch 22, and in step S5, an M code for receiving a MIDI code output from another electronic musical instrument (not shown) is received.
An IDI receiving process is performed. In step S6, after performing other processes, the process returns to step S2 and repeats the processes in step S2 and subsequent steps.

FIG. 4 is a flowchart showing a detailed procedure of the keyboard processing subroutine of step S2 in FIG.

First, in step S11, it is determined whether or not there is a key-on event. If there is a key-on event, the process proceeds to step S12, in which the key code KC of the key pressed by the player sets the shift amount for the pitch shift. The value is added to the value of the buffer BUFF to be updated. In a succeeding step S13, a sound assignment process for assigning the key code updated in the step S12 and its accompanying data (hereinafter referred to as "key code or the like") to a time slot of a sound assignment channel is performed. In a step S14,
The key code or the like to which the sound is assigned is transmitted to the sound source 6 in FIG. On the other hand, if there is no key-on event in step S11, the process skips steps S12 to S14 and proceeds to step S15.

In step S15, it is determined whether or not there is a key-off event. If there is a key-off event, the process proceeds to step S16, in which the tone generated by the tone generator 6 is silenced, and then this subroutine process is terminated. . On the other hand, if there is no key-off event in step S15, the process of step S16 is skipped, and the present subroutine process ends.

FIG. 5 is a flowchart showing a detailed procedure of the panel processing subroutine of step S3 in FIG.

[0027] First, it is determined whether the hold switch 22 of _the event in step S21, the process proceeds to step S22 when there is an event, performs a reversal process of the hold flag HF indicating whether the hold mode, events If not, the process skips step S22 and proceeds to step S23. In step S23, it is determined whether or not there is a re-trigger switch 22 ₂ events, the process proceeds to step S24 when there is an event, retrigger (RT)
Inversion processing of the retrigger flag RTF indicating whether the mode is the mode or not is performed. If there is no event, the process skips step S24 and proceeds to step S25.

[0028] At the following step S25, the switches for the shift amount setting arranged in the panel switch 1 (not shown), the setting processing of the pitch shift amount by the up switch 21 ₁ or the down switch 21 ₂ in FIG. 2 The setting amount is set in the register PSV in the RAM 5 in FIG.
(Pitch Shift Value).

Further, in step S26, since the sound source 6 is assumed to be a sound source configured so that the pitch is changed according to the pitch transition speed only by writing the pitch transition speed, the pitch transition speed is set. A pitch speed setting process is performed, and the pitch shift speed is stored in the RAM 5.
After being stored in the register PMS (Pich Movement Speed), the subroutine processing ends. If the sound source 6 is a general sound source that is not such a sound source, the same processing as the sound source 6 can be performed by interpolating the waveform data stored in the sound source by software and changing the pitch. it can.

FIG. 6 is a flowchart showing a detailed procedure of the pitch shift processing subroutine of step S4 in FIG.

In step S31, the value of the hold flag HF is determined, and in the hold mode (when the hold flag HF is "1"), a pitch shift process in the hold mode described later (step S32) is performed. When the subroutine is not in the hold mode (when the hold flag HF is “0”), the subroutine is executed after performing a pitch shift process in a non-hold mode described later (step S33). finish.

FIGS. 7 and 8 are flowcharts showing the detailed procedure of the pitch shift processing subroutine in the hold mode described above.

Firstly, in step S41, it is determined whether or not there is up switch 21 ₁ of the on-event of Figure 2, when in the ON event process proceeds to step S42, to invert the up flag UPF. In a succeeding step S43, the value of the up flag UPF is determined, and the up flag UPF is determined.
Is "1", the down flag D is determined in step S44.
Determine the value of WF. Down flag D in step S44
When WF is "1" the process proceeds to step S45, and resets the down flag DWF, turns off the down switch 21 ₂ of LED23 in step S46. That is, when proceeding to step S45, the down switch 21 ₂ is pressed (down flag DWF is "1"), since the pitch-down has been made, in order to cancel the control process, step S45 and step S46 Is performed.

[0034] Then, the process proceeds to step S47, turns on the up switch 21 ₁ of the LED 23, after performing the pitch shift implementation process for the pitch-up at step S48, the ends this subroutine.

On the other hand, in step S44, the down flag DW
When F is "0", steps S45 and S46 are skipped, and the process proceeds to step S47. In this case, not performed the pitch down-down switch 21 _2, the above step S45 and S4
This is because there is no need to perform the processing of No. 6.

In step S43, the up flag UP
When F is "0", the process proceeds to step S49, to turn off the up switch 21 ₁ of the LED23, step S50
After the pitch shift stop processing is performed in step, the present subroutine processing ends. The operation proceeds to step S49, the case of changing from "0" up flag UPF is "1", i.e., pushed up switch 21 ₁ in the pitch shift processing again, the musician instruction to stop the pitch shift processing This is the case, and the CPU 3 needs to stop the pitch shift.

Furthermore, when there is no up switch 21 ₁ on event in the step S41 proceeds to step S51 in FIG. 8, it is determined whether there is a down switch 21 ₂ ON event of FIG. At this time, if there is an ON event, the process proceeds to step S52, and if there is no ON event, the present subroutine process ends. Step control process of S52~ step S60, to the control processing in step S42~ step S50 described above, the control process and the down switch 2 based on the up switch 21 ₁
Only in that interchanged and 1 ₂ to control based on the processing is different. Therefore, the description of the control processing after step S52 in FIG. 8 will be omitted.

[0038] As described above, according to this pitch shift processing, up switch 21 ₁ or the down switch 2
Since the discrimination only 1 _second on-event, it is possible to switch 21 _1, 21 ₂ be away, it continues to hold the pitch shift operation. Also, when the pitch shift operation is held, when a switch 21 _1, 21 ₂ is pressed, the pitch shift operation is canceled.

FIGS. 9 and 10 show steps S3 of FIG.
9 is a flowchart illustrating a detailed procedure of a pitch shift processing subroutine when the mode is not the hold mode of No. 3;

First, in step S61, the up switch 2
To determine whether there are 1 ₁ ON / OFF event inverts the up flag UPF is when there is an event (step S62), and determines the value of the up flag UPF (step S63). At this time, when the value of the up flag UPF is "1", performed step S47, S48 similarly to the lighting process of the up switch 21 ₁ of LED23 in FIG. 7 (Step S64), and pitch shift execution processing (step S65) Thereafter, the present subroutine processing ends. On the other hand, in the determination of step S63, the up flag UP
When the value of F is "0", the process proceeds to step S66, S67, similarly to step S49, S50 in FIG. 7, after the off processing and pitch shift canceling process up switch 21 ₁ of the LED23, respectively, the subroutine To end.

On the other hand, in step S61, when there is no up switch 21 ₁ on / off event, the process proceeds to step S71 in FIG. 10, the down switch 21 ₂ ON /
It is determined whether there is an off event. At this time, if there is no event, this subroutine processing is ended, while if there is an event, the process proceeds to step S72. The control processing of steps S72 to S77 is different from the control processing of steps S62 to S67 described above.
Only in that replaced and a control process based on the control process and the down switch 21 ₂ based on the up switch 21 ₁ are different. Therefore, the description of the control processing after step S72 in FIG. 10 will be omitted.

[0042] As described above, according to this pitch shift processing, up switch 21 ₁ or the down switch 2
Since the on / off event of 1 ₂ is determined, the pitch shift operation is performed only while the switches 21 ₁ and 21 ₂ are being pressed.

FIG. 11 is a flowchart showing a detailed procedure of the pitch shift execution processing subroutine of step S48 in FIG.

First, at step S81, the retrigger flag R
The value of the TF is determined. When the retrigger flag RTF is "1", the process proceeds to step S82. When the up flag UPF is "1", the value of the register PSV set in step S25 of FIG. When the down flag DWF is “1”, the value of the register PSV is subtracted and stored in the memory MPSV. In step S82, when both the up flag UPF and the down flag DWF are "0", the process proceeds to step S83 without doing anything.

In step S83, the value of the memory MPSV is added to the pitch data of the tone being generated, and the sound source 6 shown in FIG.
Output to At this time, a musical tone to which a new envelope has been added is reproduced from the sound source. However, instead of re-producing a new musical tone, only the pitch may be changed. Whether to re-produce or only change the pitch is a choice that is changed according to the specifications of the electronic musical instrument to be designed.

In the following step S84, the memory MPSV
Is converted into a control change format and output to the MIDI interface 7 in FIG. Thereby, the MIDI code is output from the MIDI terminal. Here, the control change is one of the MIDI codes, and the numerical data (pitch shift amount) is converted into a format unique to the control change, output via the MIDI interface 7 in FIG. Is recognized by an external electronic musical instrument connected to the MIDI terminal 16, the pitch of a musical tone generated by the electronic musical instrument is changed by a pitch shift amount according to the numerical data. Needless to say, when the electronic musical instrument of the present embodiment receives a control change code from an external electronic musical instrument connected to the MIDI terminal 16, the tone of the musical tone generated by the electronic musical instrument of the present embodiment shifts. Will be

Next, the process proceeds to a step S85, wherein the memory MP
The value of SV is stored in buffer B described in step S12 of FIG.
It is written in UFF, and is used as a pitch shift amount of a musical tone to be generated next, that is, an added value to be added to a key code of a key to be pressed. Thereafter, the present subroutine processing is terminated.

On the other hand, if the retrigger flag RTF is "0" in step S81, the process skips steps S82 to S84 and proceeds to step S85. In this case, the retrigger mode is released, and even if a pitch shift instruction is issued while a musical tone is being generated, the pitch shift is not performed until the next key ON event occurs.

Note that this subroutine processing is shown in FIGS.
0 pitch shift processing (steps S58, S65, S7)
Also used in 5).

FIG. 12 is a flowchart showing a detailed procedure of the pitch shift stop processing subroutine of step S50 in FIG.

First, at step S91, the retrigger flag R
The value of TF is determined, and when the retrigger flag RTF is "1", the flow advances to step S92 to return the pitch of the tone being sounded to the original. In a succeeding step S93, "0" is converted into the control change format, and the conversion result is output to the MIDI interface. here,
“0” means that no pitch shift is performed.
That is, as described above, when the external electronic musical instrument recognizes the conversion result output from the MIDI terminal, the pitch is shifted and the pitch of the tone being reproduced is returned to the original.

[0052] In the following step S9 4 buffer BUFF
Is cleared, and this subroutine processing is terminated. Here, the reason why the buffer BUFF is cleared is to prevent the pitch shift of the musical tone to be generated next.

On the other hand, when the retrigger flag RTF is "0" at step S91, the retrigger mode has been released, so that steps S92 and S93 are skipped in the same manner as the pitch shift execution subroutine of FIG. Proceed to S94.

Note that this subroutine processing is described in FIGS.
0 pitch shift stop processing (steps S60, S67,
It is also used in S77).

FIG. 13 shows the MIDI data of the step S5 in FIG.
It is a flowchart which shows the detailed procedure of a reception processing subroutine.

At step S101, the received MIDI
It is determined whether or not the code is a control change. If the code is a control change, the process proceeds to step S102, where the numerical code converted in the control change format is returned to the original numerical value, and the value is added to the pitch of the musical tone being sounded. Output to the sound source 6. In a succeeding step S103, reception processing of other MIDI codes is performed, and the present subroutine processing ends.

As described above, according to this embodiment,
When the pitch shift switch 21 is operated during the retrigger mode and the pitch is changed, the pitch of the tone being sounded is changed from the time when the pitch shift switch 21 is operated, so that the pitch can be changed in real time. it can. Also, during the hold mode, the pitch shift switch 2
When the pitch is changed by step 1, the change of the pitch is continued until the pitch shift switch 21 is operated next time. Therefore, the pitch of the pitch depressed by the keyboard 2 while maintaining the desired pitch shift amount is maintained. Can be changed.

In this embodiment, the shift of the pitch has been described. However, the present invention is not limited to this, and may be applied to the shift of the pitch.

[0059]

As described above, according to the first aspect of the present invention, in a pitch shift operator for shifting a pitch of a sound to be produced by a desired amount, a time point when the pitch shift operator is operated is determined. First pitch control means for performing a pitch shift from a sound being produced, second pitch control means for performing a pitch shift from a newly produced sound after operating the pitch shift operator, and The first pitch control means and the first selection means for selecting the second pitch control means, when the first pitch control means is selected, the pitch shift is performed in real time from a desired point in time, When the second pitch control means is selected, a pitch shift is performed from a sound to be generated next,
The player can freely select the time point of the pitch shift according to the performance state, and the effect that the performance effect can be further improved can be obtained.

According to the second aspect of the present invention, the first
When the second mode is designated, the pitch of the sound to be generated is shifted by the pitch amount corresponding to the operation amount during the period from the first ON event to the next ON event of the pitch shift operator, and the second mode is set. When designated, the pitch of the sound to be emitted is shifted by a pitch amount corresponding to the operation amount from the on event of the pitch shift operator to the corresponding off event, so that the pitch shift is shifted by a certain amount. The first mode is specified for a fixed amount and the second mode is specified for a short pitch shift, and either of the two modes is specified according to the user's purpose. A mode can also be specified, thereby improving operability.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of an electronic musical instrument provided with a pitch shift operator according to the present invention.

FIG. 2 is a diagram showing an example of an arrangement of main switches of the panel switch of FIG. 1;

FIG. 3 is a flowchart of a main routine executed by a CPU in FIG. 1;

FIG. 4 is a flowchart showing a detailed procedure of a keyboard processing subroutine of step S2 in FIG. 3;

FIG. 5 is a flowchart showing a detailed procedure of a panel processing subroutine of step S3 in FIG. 3;

FIG. 6 is a flowchart showing a detailed procedure of a pitch shift processing subroutine of step S4 in FIG. 3;

FIG. 7 is a flowchart showing a detailed procedure of a pitch shift processing subroutine in the hold mode of FIG. 6;

FIG. 8 is a flowchart showing a detailed procedure of a pitch shift processing subroutine in the hold mode in FIG. 6;

FIG. 9 is a flowchart showing a detailed procedure of a pitch shift processing subroutine in the non-hold mode in FIG. 6;

FIG. 10 is a flowchart showing a detailed procedure of a pitch shift processing subroutine when the mode is not the hold mode in FIG. 6;

FIG. 11 is a flowchart showing a detailed procedure of a pitch shift execution processing subroutine in step S48 of FIG. 7;

FIG. 12 is a flowchart showing a detailed procedure of a pitch shift stop processing subroutine of step S50 in FIG. 7;

FIG. 13 is a flowchart showing a detailed procedure of a MIDI reception processing subroutine of step S5 in FIG. 3;

[Explanation of symbols]

3 CPU (first pitch control means, second pitch control means, control means) 21 pitch shift switch (pitch shift operator) 22 mode switch (pitch shift operator) 22 retrigger switch (selection means , mode designating means)
Stage ) 22 Hold switch ( mode designating means)

Claims (2)

(57) [Claims] 1. An electronic musical instrument having a pitch shift operator for shifting a pitch of a sound to be produced by a desired amount, wherein a pitch shift is performed from a sound being emitted at the time of operating the pitch shift operator. 1 pitch control means, 2nd pitch control means for performing a pitch shift from a newly sounded sound after operating the pitch shift operator, 1st pitch control means and 2nd pitch control An electronic musical instrument provided with a pitch shift operator. 2. The method according to claim 1, wherein the pitch of the sound to be pronounced is shifted by a desired amount.
Shift, On / off switchPitch shift operation
ChildWhen,Mode for specifying either the first or second mode
Code designation means, When the first mode is designated, the pitch shift
From the first on event to the next on event
Up to the pitch amount corresponding to the operation amount.
While the second mode is
When specified, the pitch shift operator
Between the vent and its corresponding off event,
The pitch of the pronounced sound is changed by the pitch amount according to the work volume.
Control means for controlling to shift; and It is special to have
An electronic musical instrument equipped with a pitch shift operator.