JP4471697B2 - Electronic musical instruments - Google Patents

Description

  The present invention relates to an electronic musical instrument having a key range dividing function capable of performing a different operation such as dividing a plurality of performance operators such as a keyboard into a plurality of key ranges and changing a timbre depending on the key range.

  In an electronic musical instrument having a keyboard, functions such as dividing a key range into a plurality of keys and assigning different timbres or specifying chords to each key range are performed. There has been proposed one in which the division point of this key range changes depending on the performance operation situation. Japanese Patent No. 3156285 (Patent Document 1) describes an upper key range played with the right hand and a lower key range played with the left hand. An electronic musical instrument that detects and uses the midpoint between them as a dividing point of the key range is disclosed.

Further, in Japanese Patent No. 3405020, when a key is not pressed at all, a point where the key is pressed first is set as a division point, and then a key is not pressed at all and a new key is pressed in that state. An electronic musical instrument in which a dividing point is changed when a key is present is disclosed.
Japanese Patent No. 3156285 Japanese Patent No. 3405020

  However, in the electronic musical instrument described in Patent Document 1, it is assumed that the performance is performed with both hands, and the key range division point can be set when the key range played with each hand can be separately determined. However, there is a problem in that the key division point cannot be set when both hands are close to each other or mixed with each other and are played with one hand.

  Further, in the electronic musical instrument described in Patent Document 2, in a state where no key is pressed, a point where the key is pressed first is set as a key division point, and then no key is pressed at all. Since the key division point is maintained until the key is pressed, there is a problem that the key division point is not changed when performing continuously.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electronic musical instrument that can appropriately change the key range division point when continuously playing on adjacent keys. .

  In order to achieve the above object, an electronic musical instrument according to claim 1 of the present invention is an electronic musical instrument having a different function for each key range by dividing a keyboard having a plurality of keys into a plurality of key ranges by key division points. Then, when the key depression detecting means for detecting the key depression state and the key depression detecting means detect that any key is pressed in a state where no key is depressed, When it is detected that the key corresponding to the key division point has been released, if there is another key that has been pressed, the key that has been pressed is a new key. Division point changing means as key range division points.

  The electronic musical instrument according to claim 2 is the electronic musical instrument according to claim 1, wherein when the key corresponding to the key range division point is released, the division point changing means is configured such that the pressed key is a predetermined key range. In this case, the key range dividing point is changed.

  The electronic musical instrument according to claim 3 is the electronic musical instrument according to claim 1 or 2, wherein the dividing point changing means has a plurality of keys pressed when a key corresponding to the key range dividing point is released. When doing so, one of the plurality of keys is selected in accordance with a predetermined pitch order, and the selected key is used as a new key range division point.

  According to a fourth aspect of the present invention, in the electronic musical instrument according to the first or second aspect, the dividing point changing means is configured such that when the key corresponding to the key range dividing point is released, the current key among the keys being pressed is The pitch of the key closest to the key range division point is set as the new key range division point, or the pitch of the key that is pressed farthest from the current key range division point is set as the new key. This is the division point.

  The electronic musical instrument according to claim 1 is an electronic musical instrument that divides a keyboard having a plurality of keys into a plurality of key ranges by key range dividing points and has different functions for each key range, wherein the key pressing state is changed. When the key press detecting means to detect and the key press detecting means detects that any key is pressed in a state where no key is pressed, the key is used as a key area division point. When it is detected that the key corresponding to the area dividing point has been released, if there is another pressed key, the dividing point changing means using the pressed key as a new key area dividing point Since the key range dividing point is set by the first key depression, the key range dividing point can be changed.

  According to the electronic musical instrument of the second aspect, in addition to the effect produced by the electronic musical instrument of the first aspect, the dividing point changing means is a key pressed when the key corresponding to the key range dividing point is released. Since the key division point is changed when the key is present in a predetermined key range, the changed key division point is easily understood by the performer and is appropriately changed.

  According to the electronic musical instrument of the third aspect, in addition to the effect produced by the electronic musical instrument of the first or second aspect, the dividing point changing means is depressed when the key corresponding to the key range dividing point is released. If there are a plurality of keys, one of the plurality of keys is selected according to a predetermined pitch order, and the selected key is used as a new key range division point. There is an effect that the dividing point is clearly understood by the performer and is appropriately changed.

  According to the electronic musical instrument of the fourth aspect, in addition to the effect produced by the electronic musical instrument according to the first or second aspect, the dividing point changing means is pressed when the key corresponding to the key range dividing point is released. The pitch of the key that is closest to the current key range dividing point among the currently pressed keys is set as the new key range dividing point, or the key that is pressed farthest from the current key range dividing point Therefore, there is an effect that the changed key division point can be clearly understood by the performer and appropriately changed.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows the appearance of an electronic accordion which is an electronic musical instrument of the present invention. In the figure, a keyboard portion 2 played with the right hand is provided with a plurality of keys 3, and a registration button 4 is provided at the rear of the keys 3. Each key and each registration button 4 is provided with a sensor to detect the operated state. A key division point is set according to the performance state of the keyboard section 2, and a timbre is assigned to each of the upper key range and the lower key range divided by the key division point. Corresponding to each registration button 4, a combination of the timbres of the upper key range and the lower key range is stored, and when one of the registration buttons 4 is selected, each of the upper key range and the lower key range is stored. The tone is set to.

  Here, a method (mode) for setting a key range division point (split point) will be described. First, when a key is pressed while none of the keys on the keyboard are pressed, the key is set as a split point. When a plurality of keys are pressed simultaneously, the lowest key or the highest key is set as the split point.

  If the key corresponding to the split point is released and another key is pressed, the split point is changed to one of the pressed keys, and neither key is pressed. If not, do not change the split point.

There are the following four modes for changing the split point.
(1) Higher mode: When the key corresponding to the split point is released, if the pressed key is in a key range higher than the split point, the split point is changed to that key. If there are multiple keys, the key with the lowest pitch is set as the new split point.
(2) Lower mode: When the key corresponding to the split point is released, if the pressed key is in a key range lower than the split point, the split point is changed to that key. If there are multiple keys, the key with the highest pitch is set as the new split point.
(3) Highest mode: When the key corresponding to the split point is released, if the key being pressed exists in the entire area, the split point is changed. If there are multiple keys pressed The key with the highest pitch is set as the new split point.
(4) Lowest mode: When the key corresponding to the split point is released, if the key being pressed exists in the entire area, the split point is changed, and there are multiple keys being pressed. Uses the key with the lowest pitch as a new split point.
In this embodiment, it is assumed that one of the modes is preset in the electronic musical instrument.

  The accompaniment section 7 played with the left hand is provided with a number of performance buttons 8. The base 8 and chord are assigned to the button 8 played with the left hand, and these timbres are selected and set by the registration button 9.

  A bellows is provided between the right-hand keyboard part 2 and the left-hand accompaniment part 7 as in the acoustic accordion, and a sensor for detecting the pressure of air inside the bellows is provided. Inside the keyboard part 2 of the right hand, an electric control circuit, a battery for supplying electric power to the electric control circuit, and a speaker 17 are provided.

  FIG. 2 is a block diagram of the electric control circuit. In the figure, a CPU 10, a ROM 11, a RAM 12, a keyboard detecting unit 13 for detecting sensors of the key 3 and the performance button 8, an operation panel detecting unit 14 for detecting sensors provided in the registration buttons 4 and 9, a sound source 15 are connected to each other by a bus. The sound source 15 is connected to a D / A converter and an amplifier 16, and the amplifier 16 is connected to a speaker 17.

  The CPU 10 is a central processing unit and executes various programs stored in the ROM 11. The ROM 11 stores a control program and fixed value data that is referred to when the program is executed. The fixed value data includes a timbre parameter for setting a timbre assigned to each registration button. The RAM 12 is a rewritable memory that has an area for storing various register groups required when the CPU 10 executes a control program and a note map 12a for storing a key depression state, and can be accessed at random. The note map 12a has a storage area corresponding to each of the keys 3 of the keyboard unit 2, and a flag is set when the key is pressed and reset when the key is released. This flag is set to “1” representing the MIDI channel of the upper key range when the key is determined to belong to the upper key range, and to the lower key range when it is determined to belong to the lower key range. Set to “2”, which represents a MIDI channel.

  The sound source 15 generates or stops a musical sound according to performance information such as note-on and note-off sent from the CPU 10, and has a plurality of sound generation channels. Assigned to a channel.

  Note-on is composed of a MIDI channel and a key number, and a tone color is designated by a program change corresponding to the MIDI channel. A MIDI channel 1 is assigned to the upper key range of the keyboard 2, a MIDI channel 2 is assigned to the lower key range, a MIDI channel 3 is assigned to the chord, and a MIDI channel 4 is assigned to the base.

  The musical tone of the digital signal generated by the sound source 15 is converted into an analog signal by a D / A converter (not shown), amplified by the amplifier 16 and emitted by the speaker 17.

  FIG. 3 is a flowchart showing main processing executed by the CPU 10. This process is repeated after the electronic musical instrument is turned on until the power is turned off. When the power is turned on, initial settings such as note map 12a and register clearing are first performed (S1). Next, a key event that any key on the keyboard is pressed or released is detected (S2). When a key event is detected (S3: Yes), a key event process (S4) described later is performed, and when a key event is not detected (S3: No) and after the process of S4 is completed, the state of the registration button is detected. (S5). When it is detected that the registration button is pressed (S6: Yes), settings corresponding to the pressed registration button are performed (S7), and when the registration button is not pressed (S6: No) After the process of S7 is completed, other processes are performed (S8). Each registration button 4 of the keyboard section 2 is assigned a tone A of the upper key range divided by the split point and a tone B of the lower keyboard, and each registration button of the accompaniment section 7 is assigned a chord. A tone color C and a bass tone color D are assigned.

  When any one of the registration buttons is operated, the program change of the timbre set in the registration button is transmitted to each MIDI channel. For example, when any one of the registration buttons 4 of the keyboard unit 2 is operated, a program change for setting the MIDI channel 1 to timbre A and a program change for setting the MIDI channel 2 to timbre B are transmitted to the sound source 15. The

  FIG. 4 is a flowchart showing the key event processing in S4. First, it is determined whether the key event is note-on (key press) or note-off (key release) (S10). If the key event is note-on (S10: Yes), it is determined whether or not a flag is set in the storage area corresponding to any key in the note map (S12). When the flag is not set (S12: No), the key division point (split point: SP) is set as the pitch (key number: KN) of the key (S14).

  When the flag is set in any storage area of the note map in the determination process of S12 (S12: Yes) and after the process of S14, it is determined to which key area the key belongs (described later). Key range determination processing to be performed, S16), and a note-on message is sent to the sound source 15 so as to start sound generation on the MIDI channel corresponding to the tone color assigned to the determined key range (S18). Next, the transmitted MIDI channel is stored in the storage area corresponding to the key (KN) of the note map (S20), and this routine is terminated.

  On the other hand, if it is determined in S10 that the key event is not note-on, that is, note-off (S10: No), the MIDI channel stored in the key number corresponding to the note map is read, and note-off is performed on the MIDI channel. 15 (S22), and the flag corresponding to the key is cleared (S24).

  Next, it is determined whether or not the note-off key number KN is the currently set split point SP (S26). If it is not the split point SP (S26: No), this routine is terminated. If it is a split point, split point change processing is performed (split point change processing described later: S28), and this routine is terminated.

  FIG. 5 is a flowchart showing the key range determination processing in S16. First, it is determined whether the set mode is the higher mode or the highest mode (S40). If it is either the higher mode or the highest mode (S40: Yes), it is determined whether the note-on key number KN is equal to or higher than the split point SP (S42). When the key number KN is equal to or higher than the split point SP, it is determined that it is the upper key range (S44), and when the key number KN is lower than the split point SP, it is determined that it is the lower key range (S46).

  On the other hand, if it is determined in S40 that neither the higher mode nor the highest mode is set (S40: No), it is determined whether the note-on key number KN is equal to or lower than the split point SP (S48). When the key number KN is higher than the split point SP (S48: No), it is determined that it is the upper key range (S50), and when the key number KN is equal to or lower than the split point SP, it is determined that it is the lower key range ( S52).

  FIG. 6 is a flowchart showing the split point changing process in S28. First, it is determined whether or not the set mode is a higher mode (S60). If it is in the higher mode (S60: Yes), the note map 12a is searched from the next highest key after the current split point SP upward (higher pitch), and any key is pressed. Whether or not the flag is set (S62). If any key is found (S70: Yes), the split point is changed (S72). If no key is searched for and found (S70: No), this routine is terminated.

  In the determination process of S60, when the mode is not the higher mode but the highest mode, the note map 12a is searched downward from the highest note to search whether any key is pressed (S64). ). If any key is found (S70: Yes), the split point is changed (S72). If no key is found by searching (S70: No), this routine is terminated.

  Similarly, in the lower mode, the note map 12a is searched from the next lowest key to the current split point SP downward (lower pitch) to find out which key is pressed. (S66). In the case of the lowest mode, the note map 12a is searched upward from the lowest sound to search whether any key is pressed (S68).

  FIG. 7 shows how the split point is changed using a musical score when the higher mode is set. (A) is an example of a musical score, and (b) shows how the key range dividing points in the staff are changed corresponding to the musical score of (a). In this example, when a plurality of keys are pressed at the same time without pressing any key, the lowest key is set as the split point.

  First, when the keys of pitches F4 and A4 are pressed, the split point is set to F4, and the keys of F4 and A4 are determined to be in the upper key range and sounded with tone A. Next, the G4 key is played in a legato manner so that it is smoothly connected from the previous F4 and A4 as a slur is attached to the score. Specifically, G4 is pressed while F4 and A4 are pressed. Since G4 is higher than the split point, it belongs to the upper key range, and sound generation starts with tone A. Immediately after that, the keys of F4 and A4 are released and the sound is muted, so that the effect of the legato performance that smoothly shifts from F4 and A4 to G4 is obtained.

  The released key F4 is a split point key. Since G4 having a pitch higher than F4 is pressed, the split point is changed to G4. Next, before the key G4 is released, the keys F4 and A4 are pressed. Since F4 is lower than the split point, it belongs to the lower key range, and sound generation starts with tone B, and A4 belongs to the upper key range because it is higher than the split point, and sound generation starts with tone A. Immediately thereafter, the G4 key is released and the split point is changed to A4. Next, C5 is pressed while F4 and A4 are pressed. Since C5 is higher than the split point, it belongs to the upper keyboard and is sounded with tone A.

  Next, B ♭ 4 and G4 are pressed at the same time, B 音 4 begins to sound with tone A, G4 starts with tone B, and when A4 is released, the split point is changed to B ♭ 4. The Subsequently, F4 and then E4 are pressed while B ♭ 4 is pressed, and both are sounded with tone B. Next, as shown by the 8-minute rest, the split key B ♭ 4 is released, but at this point, there is no key depression above the split point, so the split point is set to B ♭ 4. Maintained. At the end of this measure, all keys are released at the end of the measure, as indicated by the breath mark.

  C4 is pressed at the beginning of the next bar, and the split point is set to C4. Until then, the split point is maintained at B ♭ 4. When the keys D4, E4,... Are pressed after C4, the split point is similarly changed to D4, E4, G4, A4, and the sound is generated according to the key range set by the split point. The tone to be played is set. Therefore, the melody is pronounced with tone color A, and the counter melody is pronounced with tone color B.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications and changes can be easily made without departing from the spirit of the present invention. Can be inferred.

  For example, in the above embodiment, an electronic accordion is used as an example of an electronic musical instrument. However, the present invention may be applied to a sound source module that does not have an electronic piano, electronic organ, synthesizer, or keyboard and generates a musical sound by MIDI input.

  In the above embodiment, the key played with the right hand of the electronic accordion is a piano type key, but may be a button type key.

  In the above embodiment, the four modes for changing the split point have been described. However, as another mode, when the key corresponding to the split point is released, there is a pressed key. When the split point is changed and there are a plurality of pressed keys, the key closest to or far from the split point may be used as the split point.

  In the above embodiment, the mode for changing the split point is set in advance in the electronic musical instrument. However, a switch for mode selection is provided on the operation panel so that the player can arbitrarily select it. Alternatively, it may be stored together with a combination of timbres as one of the registrations.

  In the above embodiment, the split point can be set in the entire key range, but the split point may be set only in a predetermined sound range. In this case, the same timbre as the upper key range, the same timbre as the lower key range, or the third timbre may be assigned outside the predetermined area.

  Further, the present invention may be applied on the upper side or lower side of the split point set by a predetermined method, or on both sides.

  When switching between the higher mode (highest mode) and the lower mode (lowest mode), the tone A assigned to the upper key range is set to the lower key range, and the tone B assigned to the lower key range is set to the upper key. You may make it allocate to a zone.

  Also, in the above-mentioned score example, in the higher mode, when a plurality of keys are pressed at the same time without any key being pressed, the lowest key is set as the split point, but in the lower mode or the lowest mode. In this case, the highest key may be used as the split point.

It is a figure which shows the external appearance of the electronic musical instrument (electronic accordion) by this invention. It is a block diagram of the electric control circuit of an electronic musical instrument. . It is a flowchart which shows the main process performed by CPU. It is a flowchart which shows a key event process. It is a flowchart which shows a key range determination process. It is a flowchart which shows a split point change process. It is a figure which shows a mode that a key range division | segmentation point is changed.

Explanation of symbols

1 Electronic musical instrument (electronic accordion)
2 Keyboard 4 Registration button 10 CPU
12 RAM (storage means)
15 sound source

Claims (4)

In an electronic musical instrument having a different function for each key range by dividing a keyboard having a plurality of keys into a plurality of key ranges by key range division points,
A key depression detecting means for detecting a key depression state;
When the key detection means detects that any key is pressed in a state where no key is pressed, the key is set as a key range division point, and the key corresponding to the key range division point is When it is detected that the key has been released, if there is another pressed key, a dividing point changing unit is provided that uses the pressed key as a new key range dividing point. An electronic musical instrument.   The dividing point changing means changes the key area dividing point when the key corresponding to the key area dividing point is released and the pressed key exists in a predetermined key area. The electronic musical instrument according to claim 1.   The dividing point changing means selects one of the plurality of keys according to a predetermined pitch order when there are a plurality of pressed keys when the key corresponding to the key range dividing point is released. The electronic musical instrument according to claim 1 or 2, wherein the selected key is used as a new key range division point. When the key corresponding to the key range dividing point is released, the dividing point changing means calculates the pitch of the key closest to the current key range dividing point among the pressed keys as a new key range dividing point. The pitch of a key that is farthest from the current key range dividing point among the pressed keys is set as a new key range dividing point. Musical instrument.

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