JP5671781B2 - Electronic musical instrument and program - Google Patents

Description

  The present invention relates to an electronic musical instrument and a program.

In an electronic musical instrument with a keyboard, the keyboard can be divided into two upper and lower key ranges, and different tones can be assigned to each key range to generate musical tones with different tones depending on the key range to which the pressed key belongs. Conventionally, such a configuration is known. With such a configuration, a wider variety of performances are possible.
In recent years, there has been proposed an electronic musical instrument that not only divides the key range into two parts, but also allows the upper key area, the middle key area, and the lower key area to be divided into three (Patent Document 1). reference)

JP-A-8-234747

With the configuration shown in Patent Document 1, the number of divisions can be freely changed in such a manner that the keyboard is divided into two, three, or no division according to the content or environment to be played, and the division position is also determined by the user. Can be set freely.
For example, in the case of Patent Document 1, the operation for setting the number of divisions of the key range and each division position is generally performed using a special operator such as a rotary encoder. However, using such an operator and setting the number of divisions and a plurality of division positions one by one while looking at the keyboard image displayed on the display unit may make the operation complicated.

In particular, when changing from a state where the key range is divided into two parts to a state where it is divided into three parts, or when changing from a state where it is divided into three parts to a state where it is divided into two parts, the dividing position on the keyboard from the user's perspective Can only be taken as the difference between increasing or decreasing one. However, in the past, this change operation has to be performed using a rotary encoder or a display unit that is completely different from the keyboard to be divided, and it is intuitive to the user what each operation itself is for. It is sometimes difficult to understand.
It is recognized that this is one of the causes that the operation of setting the key range division feels complicated.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to make it possible to change the number of key range divisions and the division position by an operation more suited to human senses.

In order to achieve the above object, an electronic musical instrument according to the present invention includes a keyboard, a key press detection means for determining whether any key is pressed on the keyboard, and the keyboard is divided into a plurality of key ranges. A division position storage means for storing a division position for performing, a mode designation switch for designating one of the first mode and the second mode, the first mode is designated by the mode designation switch, and In a state where the keyboard is divided into two key ranges at the first division position stored in the division position storage means, the key depression detected by the key depression detection means is a single key, Alternatively, a first discriminating unit that discriminates a plurality of keys, and when the first discriminating unit determines that the key is depressed by a single key, the divided position is determined by using the key depressed position as a first divided position. First storage control means for storing in the storage means; A second discriminating unit for discriminating whether one of the plurality of key pressing positions is coincident with the first divided position when the discriminating unit determines that the plurality of keys are simultaneously pressed. If it is determined by the second determining means that the keys match, the key pressing position other than the matching key pressing position is stored in the divided position storage means as the second divided position, and if the two do not match A second storage control means for storing, in the divided position storage means, a key depression position determined based on an average value of the positions of the plurality of depressed keys , as a second division position; A key range discriminating unit for discriminating whether the key detected by the key press detecting unit belongs to any key range of the keyboard when the second mode is designated; The pitch corresponding to the key is detected by this key range discrimination means. It characterized by having a a sounding instruction means for instructing the sound of a musical tone in a form corresponding to the given key range.
Here, a timbre is assigned corresponding to each key range of the keyboard, and the sound generation instructing means instructs the sound generation by the timbre assigned to the key range detected by the key range dividing means. Is desirable.

A program according to the present invention includes a keyboard, a division position storage means for storing a division position for dividing the keyboard into a plurality of key ranges, and a mode designation for designating one of the first mode and the second mode. A key used for detecting whether or not any key is pressed on the keyboard, and a first mode is designated by the mode designating switch; Whether the key depression detected in the key depression detecting step is a single key in a state where the keyboard is divided into two key ranges at the first division position stored in the division position storage means. Or a first determination step for determining whether the key is a plurality of keys, and when it is determined that the key is pressed by a single key by the first determination step, the divided key is used as the first divided position. Recorded in the location storage means If one of the plurality of key pressing positions coincides with the first divided position when it is determined that the plurality of keys are simultaneously pressed by the first storage control step and the first determination step. When it is determined that the second determination step and the second determination step coincide with each other, it is determined that the key pressing position other than the corresponding key pressing position is the second division position. When it is determined that they do not coincide with each other while being stored in the storage means, the divided position is determined based on an average value of positions of the plurality of depressed keys as a second divided position. When the second storage control step stored in the storage means and the second mode are designated, it is determined whether the key detected by the key pressing detection step belongs to any key range of the keyboard Key range determination step And a sound generation instruction step for instructing sound generation in a form corresponding to the pitch corresponding to the pressed key and corresponding to the key range detected in the key range determination step. .

In the present invention, if it is desired to change the dividing position in a state where the keyboard is divided into two, the key at the position corresponding to the dividing position on the keyboard may be pressed.
Also, if you want to divide into three parts, either press the two keys at the same time so as to enclose the key at the previous division position, or one of the keys that should be pressed at the same time will be the key representing this division position Then, the two newly pressed keys become the split positions.
Such an operation is an operation that is very easy to understand sensuously, and anyone can perform the operation without feeling complicated.

FIG. 1 is an overall block diagram of an electronic musical instrument to which this embodiment is applied. FIG. 2 is a diagram showing a storage form of the work RAM of FIG. FIG. 3 is a main flow. FIG. 4 is a detailed flowchart of the switch process of FIG. FIG. 5 is a detailed flowchart of the mode switch process of FIG. FIG. 6 is a detailed flowchart of the timbre switch process of FIG. FIG. 7 is a detailed flowchart of the key range designation switch process of FIG. FIG. 8 is a flowchart (part 1) of the keyboard processing of FIG. FIG. 9 is a flowchart (part 2) of the keyboard processing of FIG. FIG. 10 is a flowchart (part 3) of the keyboard processing of FIG. FIG. 11 is a flowchart (part 4) of the keyboard processing of FIG. FIG. 12 is a flowchart (part 5) of the keyboard processing of FIG. FIG. 13 is a flowchart (part 6) of the keyboard processing of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall block diagram of an electronic musical instrument to which this embodiment is applied. The CPU 1 controls the operation of the entire electronic musical instrument in accordance with the processing procedure of the program stored in the program ROM 2. The program ROM 2 also stores a plurality of types of timbre data in the present embodiment. The work RAM 3 has an area for temporarily storing data generated when the CPU 1 performs processing. The display unit 4 displays data necessary for operating the electronic musical instrument. The keyboard 5 is used for performance operations. In the present embodiment, the keyboard 5 is divided into two or three key ranges, and a different tone color can be assigned to each of the divided key ranges. It has become. In the present embodiment, the SW unit 6 includes a mode switch, a tone color switch, and a key range designation switch. Of these, the mode switch is a switch for designating either a normal performance mode or a key range setting mode. The tone color switch is a switch for designating a tone color to be assigned to each key range on the keyboard 5. The key range designation switch is a switch for designating a key range to which the tone color designated by the tone color switch is to be assigned. In addition to this, a clear switch or the like for returning the keyboard 5 to a state without dividing the key range may be provided.
The sound source 7 generates a musical tone signal based on the pitch specified by the healthy key depression of the keyboard 5 and the tone color assigned to the key range including the depressed health key. Consists of an amplifier, a speaker, etc., and produces the generated musical tone signal.

FIG. 2 is a diagram showing a storage form of the work RAM 3 of FIG. As shown in the figure, each area stores data necessary for the processing operation of the CPU 1. The MODEF is an area for storing a flag that is “0” in the normal performance mode and “1” in the key range designation mode. Each of TONEF1, TONEF2, and TONEF3 is an area for storing a flag indicating which of the lower tone range, middle key range, and upper key range of the keyboard 5 should be assigned. SPLITF is an area for storing data indicating the division form of the keyboard 5; “0” means no division, “1” means that the upper and lower key ranges are divided into two, and “2” means the upper, middle and lower keys. Indicates that the area is divided into three. TONE is an area for storing the timbre number designated by the timbre switch.
TONE (1) is an area for storing a timbre number when the key range is not divided and a timbre number assigned to the lower key range when the key range is divided. TONE (2) is an area for storing the timbre number assigned to the upper key range when the keyboard 5 is divided into two and the middle key range when the keyboard 5 is divided into three. TONE (3) is an area for storing a timbre number indicating a timbre assigned a timbre in the upper key range when the keyboard 5 is divided into three. “NOTE” is an area for storing a pitch (keyboard number) designated by a healthy key press on the keyboard 5 in the normal performance mode. SPLIT (1) and SPLIT (2) are areas for storing keyboard numbers indicating division positions on the keyboard 5. NOTE (1) and NOTE (2) are areas for storing pitches (keyboard numbers) designated by healthy key presses on the keyboard 5 in the key range designation mode. N and n are areas for storing indexes.

3 to 13 are flowcharts showing the processing operation of the CPU 1.
FIG. 3 is a main flow. First, when the power is turned on, an initialization process for clearing the contents stored in the internal register of the CPU 1 and the work RAM 3 is performed (step S1). Subsequently, processing is performed in the order of switch processing (step S2), keyboard processing (step S3), and other processing (step S4). Steps S2 to S4 are repeated until the power is turned off.

FIG. 4 is a detailed flowchart of the switch process (step S2) of FIG. First, the mode switch process (step S5) is performed, and then the tone color switch process (step S6) and the key range designation switch process (step S7) are performed in this order.
FIG. 5 is a detailed flowchart of the mode switch process (step S5) of FIG.
First, it is determined whether or not the mode switch has been turned on (step S8). If it is determined that the mode switch has been turned on, MODEF is inverted (step S8), and this process is terminated. If it is not turned on, this process is terminated without doing anything.
Thus, every time the mode switch is operated, MODEF is inverted, and the normal performance mode and the key range setting mode are alternately set.

FIG. 6 is a detailed flowchart of the timbre switch process (step S6) of FIG.
First, it is determined whether or not the timbre switch is turned on (step S10). If the on operation is not determined here, the process is terminated.
If it is turned on, the tone number designated by this tone color switch is stored in TONE (step S10). Subsequently, it is determined whether any of the flags stored in TONEF1, TONEF2, and TONEF3 is “1” (steps S12 to S14). If the flag stored in TONEF1 is “1”, the process proceeds to step S15, the tone number stored in TONE is stored in TONE (1), and TONEF1 is returned to “0” (step S16). This process is terminated. If the flag stored in TONEF2 is “1”, the process proceeds to step S17, the tone number stored in TONE is stored in TONE (2), and TONEF2 is returned to “0” (step S18). This process ends. If the flag stored in TONEF3 is “1”, the process proceeds to step S19, the tone number stored in TONE is stored in TONE (3), and TONEF3 is returned to “0” (step S20). This process ends.
Thus, when a timbre is designated by the timbre switch, the timbre number of the designated timbre is set to one of TONE (1) to (3) according to the state of the flag stored in TONEF1 to TONEF3. Stored.

FIG. 7 is a detailed flowchart of the key range designation switch process (step S7) in FIG.
First, it is determined whether or not the flag stored in MODEF is “0”, that is, the normal performance mode (step S21). If it is determined that the value is not “0”, the process is terminated. If it is determined as “0”, the process proceeds to step S22 to determine whether or not the key range designation switch is turned on. If it is determined that the ON operation has not been performed, this process is also terminated. If it is determined that the switch is turned on, it is subsequently determined whether the value of the data stored in the SPLITF is “0”, “1”, or “2” (steps S23 to S25). Here, if it is determined as “0”, that is, if the key range on the keyboard 5 is not divided, the flag stored in the TONEF 1 is set to “1” (step S26), and this process is terminated.
If “1” is determined, that is, if the keyboard 5 is divided into the upper key range and the lower key range, the process proceeds to step S27, and either the upper or lower key range is set by the key range designation switch. Determine if it was specified. If the upper key range is designated, the process proceeds to step S28 and the flag stored in TONEF2 is set to "1". If the lower key area is designated, the process proceeds to step S26 and the flag stored in TONEF1. Is set to “1”, and this process is terminated.

On the other hand, if “2” is determined, that is, if the keyboard 5 is divided into the upper key range, the middle key range, and the lower key range, the process proceeds to step S29, and either the upper, middle, or lower key range is selected. Determine whether it was specified with the key range specification switch.
If the upper key range is specified, the process proceeds to step S28 and the flag stored in TONEF3 is set to "1". If the lower key range is specified, the process proceeds to step S26 and the flag stored in TONEF1 is set. If “1” is set and the intermediate key range is designated, the process proceeds to step S30, the flag stored in TONEF2 is set to “1”, and this process is terminated.
Thus, in the normal performance mode, when any key range is designated by the key range designation switch, any of the flags stored in TONEF1 to TONEF3 corresponding to that is set to “1”.

8 to 13 are detailed flowcharts of the keyboard process (step S3) in FIG.
First, in FIG. 8, it is determined whether or not the flag stored in MODEF is “0”, that is, the normal performance mode (step S31). If "0" is determined here, the process proceeds to step S32, and the keys on the keyboard 5 are sequentially scanned from a predetermined direction to determine whether or not there is a change for each key (step S33). If it is determined that there is no key change, this process is terminated. If it is determined that the key has been turned off, that is, it has been released, the key number of the released key is stored in the NOTE (step S34), and a note-off event is created based on the key number stored in the NOTE. (Step S35). Then, the generated note-off event is sent to the sound source 7 (step S36), and this process is terminated.
As described above, when any key is released, a note-off event corresponding to the released key is sent to the sound source 7 and the mute process is performed.

On the other hand, if it is determined in step S33 that the key has been pressed, the process proceeds to step S37, where the key number of the pressed key is stored in the NOTE. A note-on event is created based on the key number stored in this NOTE (step S38). Thereafter, it is determined whether or not the flag stored in SPLITF is “0”, that is, whether or not the key range is not divided (step S39).
If it is determined as “0”, a timbre event designating the tone color of the musical tone to be generated is created based on the timbre number stored in TONE (1) (step S40). Then, both the timbre event and the previously created note-on event are sent to the sound source 7 (step S41), and this process is terminated.
As described above, when any key is pressed and the key range is not divided, any key on the keyboard 5 is specified by the tone number stored in TONE (1). The sound of the tone you hear is pronounced.

On the other hand, if it is determined in step S39 that the flag stored in SPLITF is not “0”, the process proceeds to step S42 in FIG. 9, and the flag stored in SPLITF is “1”, that is, the keyboard 5 is in the upper and lower key ranges. Determine whether it is in a divided state.
If “1” is determined here, it is determined whether or not the keyboard number indicating the division position stored in SPLIT (1) is larger than the key number of the pressed key stored in NOTE. (Step S43). If it is determined that the keyboard number representing the key split position is larger, this means that the key was pressed in the lower key range, so the sound is generated based on the tone number stored in TONE (1). A timbre event that designates the timbre of the musical tone to be generated is created (step S44). In the opposite case, this means that the key was pressed in the upper key range, so a timbre event that specifies the timbre of the musical tone to be generated is created based on the timbre number stored in TONE (2). (Step S45). After the process of step S44 or S45, the process proceeds to step S41.
As described above, when any key is pressed and the keyboard 5 is divided into the upper and lower key ranges, when a key included in the upper key range is pressed, the key is stored in TONE (2). The tone of the tone specified by the tone number is generated, but when the key included in the lower key range is pressed, the tone of the tone specified by the tone number stored in TONE (1) is generated. .

If it is determined in step S42 that the flag stored in SPLITF is not "1", the process proceeds to step S46, where the flag stored in SPLITF is "2", that is, the keyboard 5 is up, middle and down keys. Determine whether the area is divided. If it is determined that it is not “2”, the process is terminated.
If “2” is determined, the process proceeds to step S 47 . This is because the keyboard number stored in SPLIT (2) indicates the division position of the upper key range and the middle key range, and the keyboard number stored in SPLIT (1) indicates the division position of the middle key range and the lower key range. Means to represent. Thus, at step S 47, SPLIT (2) and the relationship between the stored No. key to NOTE it is determined whether SPLIT (2) ≧ NOTE, if it is YES, the flow proceeds to step S 48 , It is determined whether the relationship between SPLIT (1) and NOTE is SPLIT (1) ≧ NOTE.
Here, if it is determined as NO in step S 47, which means that the key depression at the upper key range is performed, to create the sound events based on tone color number stored in the TONE (3) ( Step S49 ), the process proceeds to Step S41.

Also, if it is determined as YES in step S 48, which means that depressed at a low key range is performed, to create the sound events based on tone color number stored in TONE (1) ( Step S50), the process proceeds to Step S41.
Further, when it is determined that NO in step S 48, which means that depressed at the middle key range is performed, to create the sound events based on tone color number stored in TONE (2) ( step S 51), the process proceeds to the step S41.
As described above, when the keyboard 5 is divided into three, if the depressed key belongs to the upper key range, the musical tone having the tone color indicated by the tone number stored in TONE (3) belongs to the middle key range. If so, a musical tone having the tone color indicated by the tone number stored in TONE (2) is generated, and if belonging to the lower key range, a musical tone having the tone color indicated by the tone number stored in TONE (1) is generated.

Returning to FIG. 8 again, if it is determined in step S31 that the flag stored in the MODEF is “1” instead of “0”, that is, if the key range designation mode is selected, the process proceeds to step S55 in FIG. The keyboard number stored in is set to “0”, and the number of key presses stored in n is set to “0”. Subsequently, a numerical value “-1” which is not possible as a keyboard number is stored in NOTE (1) (2) (step S56).
Then, it is determined whether or not the key of the keyboard number N is pressed (step S57). If it is determined that the key is pressed, the number of key presses stored in n is incremented (step S58), and it is determined whether the key press number stored in n is "3" (step S58). If “3”, the number of key presses stored in n is returned to “2”, and the keyboard number stored in NOTE (2) is moved to NOTE (1) (step S60).
Then, N keyboard numbers are stored in NOTE (n) with n as an argument (step S61). Thereafter, the value stored in N is incremented (step S62), and it is determined whether or not the value of N exceeds the number of keys in the keyboard 5 (step S63). If it is determined that the number of keys has not been exceeded, the process returns to step S57 again.

As described above, in FIG. 10, in the key range designation mode, a process of storing two key numbers of the keys pressed on the keyboard 5 in NOTE (1) and NOTE (2) is performed.
On the other hand, when the numerical value stored in N exceeds the number of keys of the keyboard 5 in step S63, it is determined that the processing of FIG. 10 has been completed for all the keys of the keyboard 5, and the process proceeds to step S64 of FIG. . Here, it is determined whether or not the flag stored in SPLITF is “0”, that is, whether or not the keyboard 5 has not been subjected to key range division.
If it is determined that the value is “0”, it is subsequently determined whether the value stored in n, that is, whether the number of keys pressed on the keyboard 5 is “1” or “2” (step) S65, S66). If it is determined as “1”, the key number of the pressed key stored in the NOTE (1) is stored in the SPLIT (1) as a key number indicating the division position (step S67).
Then, a numerical value “1” indicating that the keyboard 5 is divided into the upper and lower key ranges is stored in SPLITF (step S68), and the flag stored in TONEF2 is set to “1” and the process is terminated (step S69). ).
In this way, in the key range designation mode, when any one key is pressed in a state where the keyboard 5 is not divided into key ranges, the tone color to be assigned to the upper key range is set as the divided key position. Can be specified.

If it is determined in step S66 that the number of key presses stored in n is “2”, the key numbers of the key presses stored in NOTE (1) and NOTE (2) are changed to SPLIT ( 1) and SPLIT (2) are stored as key numbers indicating division positions (steps S70 and S71). Then, a numerical value “2” indicating that the keyboard 5 is divided into the upper, middle and lower key ranges is stored in SPLITF (step S72), and the flag stored in TONEF2 and TONEF3 is set to “1”. Is finished (step S73).
As described above, in the key range designation mode, when any two keys are pressed at the same time in a state where the keyboard 5 is not divided, the keyboard 5 is divided into the upper key range and the middle range with the key pressed position as the divided position. Divided into a key range and a lower key range, it is possible to specify a timbre to be assigned to the middle key range and the upper key range.
On the other hand, if it is determined in step S64 that the value stored in SPLITF is not “0”, the process proceeds to step S74 in FIG. 12, and this time it is “1”, that is, the keyboard 5 is divided into upper and lower key ranges. It is determined whether it is in a state.

If it is determined that the number is “1”, it is subsequently determined whether the number of keys pressed on the keyboard 5 stored in n is “1” or “2” (steps S75 and S76). ). If the number of pressed keys is determined to be “1” in step S75, the key number of the pressed key stored in NOTE (1) is stored in SPLIT (1) as the key number indicating the division position. (Step S77), this process ends.
In this way, when any one key is depressed in a state where the keyboard 5 is divided into two parts in the upper and lower key ranges, the division position is changed to the key depression position.

On the other hand, if it is determined in step S76 that the number of key presses is “2”, first, the keyboard numbers indicating the division positions stored in SPLIT (1) are displayed in NOTE (1) and NOTE (2). It is determined whether or not it is the same as one of the key numbers of the stored key that has been pressed or the key number of the key that exists between the two keys that have been pressed (step S78).
If YES is determined, the key number of the pressed key stored in the NOTE (1) is stored in the SPLIT (1) as a keyboard number indicating the division position of the lower key area and the middle key area. In addition to storing (step S79), the key number of the pressed key stored in NOTE (2) is stored in SPLIT (2) as a keyboard number indicating the division position of the middle key range and the upper key range. (Step S80). Then, “2” indicating that it has been divided into three key ranges is stored in the SPLITF (step S81).

After that, the timbre assigned to the upper key range in the state of being divided into two is assigned as the timbre of the upper key range in the case of being divided into three, so that the timbre can be assigned to the newly generated middle key range. Don't be. Therefore, first, the tone number stored in TONE (2) is stored in TONE (3) (step S82), and then the flag stored in TONEF2 is set to “1” (step S83). The process ends.
In this way, in a state where the key range is divided into two, when two keys are simultaneously pressed so as to surround the key that is the divided position, or one of the keys that are simultaneously pressed determines the divided position. If it is a key to represent, the two newly pressed keys become the split positions.

If it is not such a key-pressed form, that is, if NO is determined in step S78, the process proceeds to step S84, where the key number stored in NOTE (2) is the split position stored in SPLIT (1). It is determined whether or not the key is larger than the keyboard number indicating that the key is pressed in the upper key range. If YES is determined here, the key number of the key located between the two keys corresponding to the keyboard numbers stored in NOTE (1) and NOTE (2) is stored in SPLIT (2) ( Step S85) Proceed to step S81.
As a result, the previous split position (SPLIT (1)) becomes the split position of the lower key range and the middle key range, and the keyboard number (SPLIT (1) located between the two keys simultaneously pressed in the upper key range. 2)) is a division position of the middle key range and the upper key range.

On the other hand, if NO is determined in step S84, it means that the key is pressed in the lower key range. For this reason, first, the keyboard number indicating the division position stored in SPLIT (1) is stored in SPLIT (2) (step S86), and in SPLIT (1), in NOTE (1) and in NOTE (2), respectively. The key number of the key located in the middle of the two keys corresponding to the keyboard number is stored (step S87), and the process proceeds to step S81.
As a result, the previous split position (SPLIT (2)) becomes the split position of the upper key range and the middle key range, and the keyboard number (SPLIT (2) located between the two keys simultaneously pressed in the lower key range. 1)) is a division position of the middle key range and the lower key range.

As described above, in the key range designation mode, when any one key is pressed while the keyboard 5 is divided into two, the division position is changed to this key pressing position, and the two keys are simultaneously transmitted. When the key is pressed, the key range is changed from 2 divisions to 3 divisions. In this case, if a key is pressed so as to surround the previous split position, or if one of the key press positions is the previous split position, these two key press positions are the new split positions. Become.
In addition, when both two key presses are performed in one divided key range, in addition to the conventional split position, a position determined based on these two key press positions, for example, two key press positions The intermediate position is designated as a new division position.

  Further, if it is determined in step S74 that the value stored in SPLITF is not “1”, the process proceeds to step S88 in FIG. 13, and whether SPLITF is “2”, that is, the keyboard 5 is set to three key ranges. It is determined whether or not it is in a divided state. If the answer is NO, the process is terminated. If YES, it is determined whether the number of key presses stored in n is “1” or “2” (steps S89 and S90). If n is determined to be “1”, the key number of the key that is stored in NOTE (1) and the key range stored in SPLIT (1) or SPLIT (2) are divided. It is determined whether or not the keyboard number indicating the position matches, that is, whether one of the keys at the two divided positions has been pressed (steps S91 and S92).

If a key indicating the division position of the lower key area and the middle key area is pressed, YES is determined in step S91, and the value stored in SPLIT (1) is incremented (step S93). That is, the dividing position of the lower key range and the middle key range is shifted by one key to the high pitch range.
If the key indicating the split position between the middle key range and the upper key range is pressed, YES is determined in step S92, and the value stored in SPLIT (2) is decremented (step S94). That is, the division position of the middle key range and the upper key range is shifted by one key to the low pitch range. After that, if the operation of pressing the key at the division position is continued, the two division positions gradually approach each other. If these two division positions overlap, the values stored in SPLIT (1) and SPLIT (2) match, so that it is determined YES in step S95. If “YES” is determined here, the value stored in the SPLITF is set to “1” indicating a state of being divided into two key ranges (step S96).

  Further, the contents of TONE (3) in which the timbre number indicating the timbre assigned to the upper key range is stored in TONE (2) (step S97), and this processing is terminated. In this way, if you continue to press the key at the split position, the split position will approach another split position, and the key at that split position will be pressed further, there will be two presses. The key positions overlap, the middle key range disappears, and the upper and lower key ranges change to a two-divided state.

On the other hand, if it is determined NO in step S91 or S92, that is, if a key other than the keys indicating the two divided positions is pressed, the process proceeds to step S98 and the pressing stored in NOTE (1) is performed. The key number that has been keyed is stored in SPLIT (1) as a key number indicating a new division position, and the process proceeds to step S96.
As a result, when any one key other than the key indicating the split position is pressed in a state where the key range is divided into three, the key press position is changed to a state where the upper and lower key ranges are divided into two.

  On the other hand, if YES in step S90, that is, if two keys are pressed at the same time, the keys stored in NOTE (1) are pressed so that these two key pressing positions become new key pressing positions. The key number of the key is stored in SPLIT (1) (step S99), and the key number of the pressed key stored in NOTE (2) is stored in SPLIT (2) (step S100). The process ends.

  As described above, when only one key is pressed in the key range designation mode and the key range is divided into three, and the key pressing position is not the split position, the key pressing position is determined. Immediately shifts to the key range two-part state where is the only division position. If the key pressing position is a divided position, the divided position is changed so as to approach the other divided position. That is, the middle key range changes in a narrowing direction. Then, if the operation of pressing the key at one division position is continued, it overlaps with the other division position, the middle key area disappears, and the key area is divided into two. When two keys are pressed simultaneously, the two key pressing positions are set to the respective new division positions.

1 CPU
2 Program ROM
3 Work RAM
4 Display 5 Keyboard 6 Switch 7 Sound source 8 Sound generator

Claims (3)

The keyboard,
A key press detecting means for determining whether any key is pressed on the keyboard;
Division position storage means for storing a division position for dividing the keyboard into a plurality of key ranges;
A mode designation switch for designating either the first mode or the second mode;
In the state where the first mode is designated by the mode designation switch and the keyboard is divided into two key ranges at the first division position stored in the division position storage means. First discriminating means for discriminating whether the pressed key detected by the detecting means is a single key or a plurality of keys;
A first storage control means for storing the key-pressed position in the divided position storage means as a first divided position when the first determining means determines that the key has been pressed;
Second determining means for determining whether one of the plurality of key pressing positions coincides with the first divided position when it is determined that the plurality of keys are simultaneously pressed by the first determining means. When,
If it is determined by the second determining means that the keys match, the key pressing position other than the matching key pressing position is stored in the divided position storage means as the second divided position and is not matched. The second storage control means for storing the key pressing position determined based on the average value of the positions of the plurality of keys pressed as the second division position in the division position storage means. When,
A key range discriminating unit for discriminating whether the key detected by the key press detecting unit belongs to any key range of the keyboard when the second mode is designated;
A sound generation instruction means for instructing the pronunciation of a musical tone in a form corresponding to a pitch corresponding to the depressed key and the key range detected by the key range determination means;
Electronic musical instrument with   The timbre is assigned corresponding to each key range of the keyboard, and the sound generation instructing means instructs the tone generation by the timbre assigned to the key range detected by the key range determining means. Electronic musical instrument. An electronic musical instrument having a keyboard, a division position storage means for storing a division position for dividing the keyboard into a plurality of key ranges, and a mode designation switch for designating either the first mode or the second mode In the computer used for
A key press detecting step for determining whether any key is pressed on the keyboard; and
The key depression in a state where the first mode is designated by the mode designation switch and the keyboard is divided into two key ranges at the first division position stored in the division position storage means. A first determination step of determining whether the key depression detected in the detection step is a single key or a plurality of keys;
A first storage control step of storing the key-pressed position in the divided position storage means as the first divided position when it is determined that the key is pressed by the first determining step;
A second determination step of determining whether one of the plurality of key pressing positions coincides with the first divided position when it is determined that the plurality of keys are simultaneously pressed by the first determination step; When,
When it is determined in the second determination step that the keys match, the key pressing position other than the corresponding key pressing position is stored in the divided position storage means as the second divided position and does not match. A second storage control step of storing, in the division position storage means, a key depression position determined based on an average value of the positions of the plurality of depressed keys as a second division position. When,
A key range determination step of determining whether the key detected by the key press detection step belongs to any key range of the keyboard when the second mode is designated;
A sounding instruction step for instructing the pronunciation of a musical tone in a form corresponding to the pitch corresponding to the pressed key and corresponding to the key range detected in the key range determining step;
A program that executes

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