JP2010078912A - Electronic musical instrument and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set a split function from a dual function in the same way as it is set from the split function to the dual function, just as in an operation of changing a split point. <P>SOLUTION: When the split function is set in a setting mode, if a highest key or a lowest key is pressed at first, it is changed to a normal function. It is selected which of two tone colors assigned in the split function is assigned for a whole range of a keyboard, depending on whether the lowest key is pressed, or the highest key is pressed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic musical instrument and a tone color designation processing program.

Conventionally, functions such as split and dual (layer) have been known for producing a plurality of different timbres with a single musical instrument. In the split, the keyboard of the electronic musical instrument is divided into a plurality of key ranges, and a different tone color is assigned to each key range. Dual means that multiple types of musical tones are played simultaneously by operating one key on the keyboard.
In recent years, electronic musical instruments having both the split and dual functions have been proposed. Moreover, a configuration has been proposed in which a dual function can be set from a split function without providing a dedicated switch.
For example, Patent Document 1 has a configuration in which a musical tone having a tone color assigned to each of two key ranges is generated in response to a key depression by setting a split point in the split function as the lowest tone key. It is disclosed.

JP 2003-66960 A

  As described above, it is possible to set the split function to the dual function, but in the opposite case, it is naturally desired to set the dual function to the split function. In such a case, providing a dedicated switch for this is problematic in terms of cost, and when the split function is set to the dual function, it can be operated as if the split point is changed, whereas the split switch is used. The fact that the operation for setting the function to the dual function is performed by a dedicated switch operation, it is extremely inconvenient for the user, and it may be difficult to understand the operation.

  An object of the present invention is to enable setting from the dual function to the split function as if the split point is changed as in the case of setting from the split function to the dual function.

  In order to achieve the above object, the present invention has a keyboard, first and second registers storing timbre data for specifying the timbre of a musical tone to be sounded, and one of split and dual functions. Function storage means for storing data indicating whether or not a key is present, key press detection means for detecting key presses on the keyboard, and a state in which data indicating dual functions is stored in the function storage means in the setting mode A first discriminating unit for discriminating whether or not the key number of the key whose key depression has been detected by the key depression detecting unit coincides with the key number of the specific key of the keyboard; In a state where the data indicating the dual function is stored in the function storage means, a second judgment is made to determine whether or not the key depression is detected again by the key depression detection means after the coincidence is judged by the first judgment means. A discriminating unit; a storage control unit for storing data representing a split function in the function storage unit when the second discriminating unit detects that the key depression has been detected; and a key pressing unit by the second discriminating unit. Data indicating a split function in a performance mode and in the function storage means when storing the key number of the key in which the key is detected as a split position for dividing the keyboard into an upper key range and a lower key range Is stored, it is determined whether the key detected by the key pressing detection means is included in the upper key range or the lower key range, and is determined to be included in the upper key range. The sound source is instructed to generate a musical tone based on the pitch corresponding to the depressed key and the timbre indicated by the timbre data stored in the first register, and included in the lower key range. If determined A first sound generation instruction means for instructing the sound source to generate a musical tone based on a tone corresponding to the depressed key and a tone color indicated by tone color data stored in the second register; and a performance mode When the data indicating the dual function is stored in the function storage means, the pitch corresponding to the key number of the key detected by the key press detection means and the first register A second instruction for instructing the sound source to simultaneously generate a musical sound based on a timbre indicated by the timbre data stored in the timbre and a musical sound based on the timbre indicated by the pitch and the timbre data stored in the second register. A pronunciation instruction means.

  The specific key is preferably the highest key or the lowest key of the keyboard.

  In addition, it is preferable that the information processing apparatus further includes an exchange unit that exchanges the contents of the first register and the second register when the highest key is pressed by the first determination unit.

  Furthermore, the present invention provides a keyboard, first and second registers storing tone color data for designating the tone color of a musical tone to be sounded, and data indicating whether a split or dual function is set. A computer applied to an electronic musical instrument having a function storage means for storing, a key depression detecting step for detecting a key depression of the key on the keyboard, and data representing a dual function in the function storage means in the setting mode. A first determination step of determining whether the key number of the key where the key depression is detected in the stored state matches the key number of the specific key of the keyboard; In a state where data representing the dual function is stored in the function storage means, a second determination is made to determine whether or not a key depression has been detected again after a match is determined in the first determination step. In another step, when it is determined that a key depression is detected in the second determination step, a storage control step for storing data representing the split function in the function storage means, and a key depression by the second determination step A division position storing step for storing the key number of the key in which the key is detected as a division position for dividing the keyboard into an upper key range and a lower key range, and data representing the split function in the function storage means in the performance mode Is stored, it is determined whether the key detected by the key pressing detection step is included in the upper key range or the lower key range, and is determined to be included in the upper key range. In this case, the sound source is instructed to generate a musical tone based on the pitch corresponding to the depressed key and the timbre indicated by the timbre data stored in the first register, and is included in the lower key range. If the sound source is determined to be played, the first sound source is instructed to generate a musical tone based on the pitch corresponding to the pressed key and the tone color indicated by the tone color data stored in the second register. A sound corresponding to the key number of the key detected in the key pressing detection step in the sound generation instruction step and in the performance mode and in the state where the data indicating the dual function is stored in the function storage means A musical tone based on the tone and the tone color indicated by the tone color data stored in the first register and a musical tone based on the tone pitch and the tone color indicated by the tone color data stored in the second register are simultaneously generated. And a second sound generation instruction step for instructing the sound source.

  According to the present invention, in a state where the dual function is set, the operation of setting the split point to the position corresponding to the lowest key or the highest key is performed, and the operation of designating the keyboard dividing position by the subsequent key pressing can be performed. For example, the setting is changed to the split function in which the two timbres used for the dual function are assigned to the upper and lower key ranges of the keyboard divided at the dividing position. In this way, the function can be switched by basically the same operation as the operation of changing the split point, and no dedicated switch is required. As a result, it is possible to easily perform the function switching setting by an operation that is very easy for the user to understand.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram of an electronic musical instrument to which the timbre setting device of the present invention is applied.
In the figure, a CPU 1 controls the processing operation of the entire electronic musical instrument based on a program stored in a program ROM 2. The program ROM 2 also stores a plurality of types of tone color data. The work RAM 3 temporarily stores data used for the processing of the CPU 1, and a register group and a flag group, which will be described later, are also configured using a part of this area.
The SW unit 4 includes a switch group for designating the tone color of the musical sound to be generated. This timbre switch group has an independent switch corresponding to each timbre data stored in the program ROM 2 described above. Furthermore, a mode switch for switching between the performance mode and the setting mode is also provided.
The keyboard 5 is used to specify the tone generation / mute and the pitch of the musical tone. The tone generator unit 6 generates a musical tone corresponding to the pitch and tone color sent from the CPU 1 and supplies it to the tone generation unit 7 to generate the tone. It is something to be made.
On the other hand, the display unit 8 displays timbre names assigned to the keyboard and other parameters necessary for performance.

FIG. 2 is a main flowchart showing the operation of the CPU 1 of FIG.
First, when the power is turned on, the CPU 1 is set to an initial state, a default value is set to a register group configured in the work RAM 3, and an initialization process is performed to set a flag group to an initial state (step S1). . Subsequently, in the SW process, a process based on the operation of the switch operated in the SW unit 4 is performed (step S2). Then, a process based on key depression / release of the keyboard 5 is performed in the keyboard process (step S3), and a process of displaying on the display unit 8 is performed in the display process (step S4). Thereafter, other processing necessary for the electronic musical instrument is performed (step S5), and the process returns to step 2 again. This series of processing is repeated until the power is turned off.

FIG. 3 is a flowchart showing details of the initialization process of FIG.
First, all the flags are set to “0” (step S10), and timbre data indicating a predetermined timbre is stored in the registers UPPER and LOWER (step S11).
The tone color data stored in the register UPPER indicates the tone color assigned to the upper key range of the keyboard 5 in the split function, and the register LOWER indicates the tone color assigned to the lower key range. In the case of the dual function, the musical tone of the timbre indicated by the timbre data stored in both registers is generated simultaneously.
Subsequently, a predetermined key number is stored in a register SPLIT that stores a key number as a division position (split point) for dividing the keyboard 5 into upper and lower key ranges (step S12). Thereafter, other initialization processing is performed (step S13), and this processing ends.

FIG. 4 is a flowchart showing details of the SW process of FIG.
First, it is determined whether or not the mode switch in the SW unit 4 has been turned on (step S20). This mode switch is a switch for switching between a setting mode for changing the setting from the split function to the dual function or the normal function and a performance mode for performing the performance.
If it is determined that it is turned on, the process proceeds to step S21, the flag MF is inverted, the flag KF is set to “0”, and this process is terminated. In the present embodiment, when the flag MF is “0”, the performance mode is indicated, and when the flag MF is “1”, the setting mode is indicated.

In the present embodiment, the flag KF performs an operation of designating a key corresponding to the division position twice when changing the setting from the split function to the dual function or from the dual function to the split function. It is configured to be “1” when the second operation is performed.
If it is determined in step S20 that the mode switch is not turned on, it is determined whether or not the tone color switch is turned on (step S22). If it is determined that the flag is ON, it is determined whether or not the flag UPF is “0” (step S23). The flag UPF is a flag for determining whether or not timbre data is stored in the register UPPER. When the flag UPF is “0”, the timbre data is not stored, and when it is “1”, it is stored. Represents the state of being.

If no timbre data is stored in the register UPPER, that is, if the flag UPF is “0”, the timbre data corresponding to the timbre switch turned on is stored in the register UPPER (step S24), and then the flag UPF. Is set to “1” (step S25), and this process is terminated.
If the tone color data is stored in the register UPPER, that is, if the flag UPF is “1”, the tone color data corresponding to the tone color switch turned on in the register LOWER is stored (step S26), and then the flag UPF is set to “ “0” and the flag SPF are set to “1” (step S27), and this process is terminated.
This flag SPF is a flag indicating whether or not the split function is set. When the flag SPF is “1”, it indicates that the split function is set. When the flag SPF is “0”, the function is released. Indicates.

  As described above, in this embodiment, each time the timbre switch is turned on, the timbre data is stored in the register UPPER, and then the LOWER, and when the timbre data is stored in both registers, the split function is set. Composed.

On the other hand, if it is determined in step S22 that the timbre switch is not turned on, it is then determined whether or not the normal switch is turned on (step S28).
This normal switch is forcibly set to the normal function. When it is determined that the normal switch is not turned on, the process is terminated. When it is determined that the switch is turned on, the flags SPF and DUALF are set to “0”. (Step S29), then the flag MF is also set to "0", and this process is terminated (Step S30).
Here, the flag DUALF is a flag indicating whether or not the dual function is set. When “1”, the dual function is set, and when “0”, the function is canceled. It shows that.

5 to 7 are flowcharts showing details of the keyboard processing of FIG.
First, the keyboard 5 is scanned (step S40), and the key state is detected (step S41). If there is no change in the state, the process of this flow is terminated. If any key is turned off from on, that is, released, the key number of the released key is stored in the register NOTE (step S42). Then, the sound source unit 6 is instructed to mute the musical sound produced at the pitch corresponding to the key number stored in the register NOTE (step S43).

  If any key is turned on from off, that is, if the key is depressed, the key number of the depressed key is stored in the register NOTE (step S44). Subsequently, it is determined whether or not the flag MF is “1”, that is, the setting mode (step S45). If the flag MF is determined to be “1”, the process proceeds to step S46, and subsequently it is determined whether or not the flag SPF is “1”, that is, whether or not the split function is set.

  If the flag SPF is “1”, it is subsequently determined whether or not the flag KF is “0”, that is, whether or not the first division position is designated (step S47). If the flag KF is “0”, whether or not the key number indicating the division position stored in the register SPLIT matches the key number of the pressed key stored in the register, that is, Then, it is determined whether or not the key corresponding to the division position has been pressed (step S48). If it is determined that they match, the flag KF is set to “1” (step S49), and this process ends.

  As described above, when the key corresponding to the division position is depressed in the setting mode and the split function is set, the flag KF becomes “1”, and the first operation for changing the function setting is performed. It will be in the state which shows that.

On the other hand, if it is determined in step S48 that a key other than the key corresponding to the divided position has been pressed, the process proceeds to step S50, where the key number stored in the register NOTE is a key number representing the lowest key or the highest key. It is determined whether they match, that is, whether the highest key or the lowest key has been pressed.
If it is determined that the highest key or the lowest key is pressed, the flag SPF is set to “0”, the split function is canceled and the normal function is set (step S51). Subsequently, it is determined whether or not the depressed key number stored in the register NOTE is the highest key (step S52), and if it is the highest key, the flag HF is set to "1" (step S53), otherwise If that is the lowest key, the flag HF is set to “0” (step S54).

As described above, when the highest key or the lowest key is pressed in the setting mode and the split function is set, the split function is canceled and the setting is changed to the normal function.
On the other hand, if it is determined in step S50 that a key other than the lowest key or the highest key has been depressed, the process proceeds to step S55, where the depressed key number stored in the register NOTE is stored in the register SPLIT, The division position is changed to a position corresponding to the pressed key.

  In this way, when a key other than the highest key or lowest key corresponding to the split position is pressed in the setting mode and the split function is set, only the split position is changed with the split function remaining. Will be.

Returning to step S47 again, the case where the flag KF is “1” will be described.
This state is when the key corresponding to the previous division position is pressed and a new key is pressed this time.
First, it is determined whether or not the key number of the pressed key stored in the register NOTE is the lowest key or the highest key (step S56). If it is determined that the key is the lowest key or the highest key, the flag SPF is set to “0” and the DUALF is set to “1” (step S57).

  In this way, when the split mode is set in the setting mode, first the key corresponding to the split position is pressed, and then the highest key or the lowest key is pressed, the split function is released. Dual function is set.

  On the other hand, if it is determined in step S56 that the lowest key or the highest key is not depressed, the key number of the depressed key stored in the register NOTE is stored in the register SPLIT and the division position is depressed. The position is changed to the position corresponding to the key (step S58), the flag KF is returned to "0" (step S59), and this process is terminated.

  In this way, when the split function is set in the setting mode, first the key corresponding to the split position is pressed, and then the key other than the highest key or the lowest key is pressed, the split function remains unchanged. Only the dividing position is changed.

Returning to step S46 again, if it is determined that the flag SPF is not “1”, that is, that the split function is not set, the process proceeds to step S60 of FIG. 6, and the flag DUALF is “1”, that is, the dual function is set. It is determined whether or not.
If it is determined that the dual function is not set, the process is terminated. If the dual function is set, the process proceeds to step S61 to determine whether or not the flag KF is “0”. It is determined whether or not the flag KF is “0”, that is, the first key depression in the setting mode and the dual function is set.
If it is determined that this is the first key press, it is further determined whether or not the key number of the current key press stored in the register NOTE is the lowest key number (step S62), and it is determined that it is not the lowest key. If so, it is then determined whether or not the key number is the highest key (step S63). If it is neither the lowest key nor the highest key, the process of this flow is terminated.

  If it is determined in steps S62 and S63 that the highest key is pressed, the flag SF is set to “1” (step S64-A), and it is determined that the lowest key is pressed. In this case, the flag SF is set to “0” (step S64-B). In either case, after that, the flag KF is set to “1” (step S64-C), and this process ends.

  After the flag KF is set to “1” by this step S64-C, the key is depressed again. When the key comes to step S61, the process proceeds to step S65, and the key that has been depressed stored in the register NOTE. It is determined whether or not the key number matches a key number other than the lowest key or the highest key. If they do not match, the process is terminated as is. If they match, the key number stored in the register NOTE is stored in the register SPLIT (step S66). In other words, the key division position is a position corresponding to the pressed key. Subsequently, the flag DUALF is set to “0” and the SPF is set to “1” (step S67).

Subsequently, it is determined whether or not the flag SF is “1” (step S68). If it is not “1”, the processing of this flow is terminated. If it is “1”, the contents of the registers LOWER and UPPER are exchanged. This process is terminated (step S69).
As described above, when the dual function is set in the setting mode, the split key is activated when the lowest key or the highest key is pressed first and then the highest key or the key other than the lowest key is pressed. The division position becomes the position of the key pressed for the second time. Furthermore, it is possible to change which of the two timbres used in the dual function is the upper key range depending on whether the first key depression is the highest key or the lowest key.

Returning to FIG. 5 again, the operation when the flag MF is not “1” in step S45 will be described.
If it is determined that the flag MF is not “1”, that is, the performance mode, the process proceeds to S70 of FIG. 7 to determine whether the flag SPF is “1”, that is, whether the split function is set. If the split function is set here, the process proceeds to step S71, where the key number of the key corresponding to the split position stored in the register SPLIT is determined from the key number of the currently pressed key stored in the register NOTE. Determine if it is larger.

If it is determined that the key is large, it means that the current key depression is performed in the lower key range, the pitch corresponding to the key number stored in the register NOTE, and the tone color stored in the register LOWER. The tone generator 6 is instructed to generate the tone of the timbre indicated by the data (step S72).
On the other hand, if it is determined that the key is small, it means that the current key depression is performed in the upper key range, the pitch corresponding to the key number stored in the register NOTE, and the tone color stored in the register UPPER The tone generator 6 is instructed to generate the tone of the tone color indicated by the data (step S73).

  If it is determined in step S70 that the flag SPF is not “1”, the process proceeds to step S74, where it is determined whether the flag DUALF is “1”, that is, whether the dual function is set. If it is determined that the dual function is set, the tone corresponding to the key number stored in the register NOTE and the tone of the timbre indicated by the timbre data stored in the register LOWER are generated. At the same time as instructing the unit 6 (step S75), the sound source unit 6 is instructed to generate a musical tone having the same tone pitch and the tone color data stored in the register UPPER (step S76).

On the other hand, if the flag DUALF is not “1” in step S74, that is, if the split function or the dual function is not set, the process proceeds to step S77 to determine whether the flag HF is “1”. To do.
This flag HF is set to “1” when the key pressed as an operation for changing the setting from the split function to the normal function is the highest key, and is set to “0” when it is the lowest key. .

  Accordingly, when the flag HF is “1”, the process proceeds to step S78, and the tone corresponding to the key number stored in the register NOTE and the tone of the tone color indicated by the tone data stored in the register LOWER are generated. The sound source unit 6 is instructed. On the other hand, when the flag HF is “0”, the tone generator 6 generates the tone corresponding to the key number stored in the register NOTE and the tone of the timbre indicated by the timbre data stored in the register UPPER. An instruction is given to it (step S79).

  In this way, when a key is pressed in the performance mode state, the tone color of the musical tone generated is switched depending on which upper or lower key range the key is pressed when the split function is set. On the other hand, when the dual function is set, musical sounds of two tones assigned to the upper and lower key ranges are generated simultaneously by the split function. Further, in the case of the normal function, a musical tone is generated using one of these two timbres. Which tone color is used is determined based on whether the key pressed in the setting mode is the lowest key or the highest key.

FIG. 8 is a flowchart showing details of the display process of FIG.
First, it is determined whether or not the flag SPF is “1”, that is, the split function is set (step S80). If the split function is set here, the process proceeds to step S81, and the key number stored in the register SPLIT is displayed on the display unit 7 as a division position. Then, the timbre name indicated by the timbre data stored in the register UPPER and the timbre name indicated by the timbre data stored in the register LOWER are displayed (step S82).

  If it is determined in step S80 that the split function is not set, the process proceeds to step S83 to determine whether the flag DUALF is “1”, that is, whether the dual function is set. If the dual function is set, the process proceeds to step S82, and the timbre name corresponding to the timbre data stored in the registers LOWER and UPPER is displayed.

If the dual function is not set in step S83, this means that the normal function is set, and then it is determined whether or not the flag HF is “1” (step S84). Here, if the flag HF is “1”, the timbre name indicated by the timbre data in the register LOWER is displayed on the display unit (step S85). If the flag HF is “0”, it is stored in the register UPPER. The timbre name indicated by the existing timbre data is displayed (step S86).
After this process, the process of this flowchart is terminated.

  As described above, according to the present embodiment, when the split function is set in the setting mode, the setting can be changed to the normal function by first pressing the lowest key or the highest key, and the split function can be changed. Which of the two tones assigned by the function can be assigned to the entire keyboard can be selected depending on whether the lowest key is pressed or the highest key is pressed.

  If the split function is set in the setting mode, the key can be changed to the dual function by pressing the key corresponding to the split position first and then pressing the lowest key or the highest key. The tone colors of the musical sounds that can be generated simultaneously are the two tone colors assigned by the split function.

  On the other hand, if the dual function is set in the setting mode, you can change the setting to the split function by pressing the lowest key or highest key first and then pressing the key at the position you want to set as the split position. it can. Moreover, whether to assign one of the two timbres used in the dual to the upper key range and the other to the lower key range can be determined depending on whether the first key press is the highest key or the lowest key. Is possible.

  As described above, since the setting change from the split function to the normal function or the dual function and the setting change from the dual function to the split function can be performed by the operation of changing the division position, a dedicated switch is not necessary.

FIG. 1 is a block diagram of an electronic musical instrument to which the timbre setting device of the present invention is applied. FIG. 2 is a main flowchart showing the operation of the CPU 1 of FIG. FIG. 3 is a part of a detailed flowchart of the SW process of FIG. FIG. 4 is a flowchart showing details of the SW processing following FIG. FIG. 5 is a part of a flowchart showing details of the keyboard processing of FIG. FIG. 6 is a flowchart showing details of the keyboard processing following FIG. FIG. 7 is a flowchart showing details of the keyboard processing following FIG. FIG. 8 is a flowchart showing details of the display process of FIG.

Explanation of symbols

1 CPU
2 Program ROM
3 Work RAM
4 SW section 5 Keyboard 6 Sound source section 7 Sound generation section 8 Display section

Claims (4)

The keyboard,
First and second registers in which timbre data for designating the timbre of a musical tone to be generated are stored;
Function storage means for storing data indicating whether the split or dual function is set;
A key depression detecting means for detecting a key depression of the key on the keyboard;
In the setting mode and in the state where data representing the dual function is stored in the function storage means, the key number of the key whose key depression is detected by the key depression detection means is the key number of the specific key of the keyboard. First discriminating means for discriminating whether or not they match,
Whether or not the key depression is detected again by the key depression detection unit after the coincidence is determined by the first determination unit in the setting mode and the data indicating the dual function is stored in the function storage unit. Second determining means for determining whether or not
A storage control means for storing data representing the split function in the function storage means when it is determined by the second determination means that a key depression has been detected;
Division position storage means for storing the key number of the key whose key depression is detected by the second determination means as a division position for dividing the keyboard into an upper key area and a lower key area;
In the performance mode and when the data indicating the split function is stored in the function storage means, the key detected by the key press detection means is included in either the upper key range or the lower key range. If it is determined that it is included in the upper key range, the musical tone based on the tone corresponding to the key pressed and the tone color indicated by the tone color data stored in the first register If it is determined that the sound is included in the lower key range, the tone corresponding to the pressed key and the timbre indicated by the timbre data stored in the second register are used. First sound generation instruction means for instructing the sound source to generate a musical sound based on the sound source;
In the performance mode and in the state where the data indicating the dual function is stored in the function storage means, the pitch corresponding to the key number of the key detected by the key pressing detection means and the first The tone generator is instructed to simultaneously generate a musical tone based on the tone color indicated by the tone color data stored in the register and a tone tone based on the tone pitch and the tone color indicated by the tone color data stored in the second register. A second pronunciation instruction means;
Electronic musical instrument with   2. The electronic musical instrument according to claim 1, wherein the specific key is a highest key or a lowest key of the keyboard.   3. The electronic device according to claim 2, further comprising: an exchange unit that exchanges the contents of the first register and the second register when the highest key is depressed by the first determination unit. Musical instrument. Function storage means for storing a keyboard, first and second registers in which tone color data for specifying the tone color of a musical tone to be generated is stored, and data indicating whether a split or dual function is set And a computer applied to an electronic musical instrument having
A key depression detecting step for detecting a key depression of the key on the keyboard;
Whether or not the key number of the key where the key depression is detected matches the key number of the specific key on the keyboard in the setting mode and with the data indicating the dual function stored in the function storage means A first determination step for determining whether or not
In the setting mode and in a state where the data indicating the dual function is stored in the function storage means, a second determination is made to determine whether or not a key depression is detected again after a match is determined in the first determination step. A determination step;
A storage control step of storing data representing a split function in the function storage means when it is determined that a key depression is detected in the second determination step;
A division position storage step for storing the key number of the key whose key depression is detected in the second determination step as a division position for dividing the keyboard into an upper key range and a lower key range;
In the performance mode and when the data indicating the split function is stored in the function storage means, the key detected by the key pressing detection step is included in either the upper key range or the lower key range. If it is determined that it is included in the upper key range, the musical tone based on the tone corresponding to the key pressed and the tone color indicated by the tone color data stored in the first register If it is determined that the sound is included in the lower key range, the tone corresponding to the pressed key and the timbre indicated by the timbre data stored in the second register are used. A first pronunciation instruction step for instructing the sound source to generate a musical sound based on the sound source;
In the performance mode and in the state where the data indicating the dual function is stored in the function storage means, the pitch corresponding to the key number of the key detected in the key pressing detection step and the first The tone generator is instructed to simultaneously generate a musical tone based on the tone color indicated by the tone color data stored in the register and a tone tone based on the tone pitch and the tone color indicated by the tone color data stored in the second register. A second pronunciation instruction step;
A program that executes

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