JP2003066960A - Electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to set a layer function without providing a dedicated switch. SOLUTION: A split point discrimination part 28 discriminates whether a split point is set at the lowest sound key in response to a key-on. When the split point is set at the lowest sound key, tone-color information is read out from both a high sound tone-color memory part 26 and a low sound tone-color memory part 27, and waveform data corresponding to this is supplied to a sound source 17. Thus, at the split mode, the mode can be changed into the layer made by setting the split point at the lowest sound key.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electronic musical instrument,
In particular, the present invention relates to an electronic musical instrument having a split function in which the key range is divided and different tone colors can be assigned to the respective divided key ranges.

[0002]

2. Description of the Related Art For example, the keyboard key range is divided into two, one for the accompaniment key range and the other for the melody performance key range.
There is known an electronic musical instrument having a so-called split function, in which different tones can be assigned to each. In this type of electronic musical instrument, there is known an electronic musical instrument that has a panel surface on which a plurality of tone color switches divided into two groups are arranged, and shifts to a split mode when the tone color switches of each group are simultaneously operated. Yes (Japanese Patent Laid-Open No.
-182895). Further, as an improvement of this electronic musical instrument, an electronic musical instrument has been proposed in which the degree of freedom in assigning a tone color to each key region after the key region is divided is increased (Japanese Patent Publication No. 2541063).

[0003]

In the conventional electronic musical instrument,
Where the key range is divided, that is, where the division position (split point) is, is arbitrary and can be set for any key. Therefore, the split point may be set to the lowest note of the keyboard. When such a split point is set, the tone colors of all keyboards are common, and the tone color setting on the low tone side of the split point is meaningless. The same applies when the split point is set to the highest note on the keyboard.

However, in recent years, there are diversified playing styles, and even when such a split point is set, it is desired to make the setting meaningful and increase the degree of freedom in playing. There is a request.

In view of the above demands, the present invention provides the following when a split point is set at the lowest note key or the highest note key:
An object of the present invention is to provide an electronic musical instrument in which a plurality of tones set in the split mode can be utilized.

[0006]

SUMMARY OF THE INVENTION The present invention for solving the above problems and achieving the object is to divide a key range of a keyboard at a split point and to produce a musical sound with a tone color assigned to each divided key range. In an electronic musical instrument having a key split function to be generated, when the split point is set to a specific note key, sound generation by the key split function is prohibited, and in response to a key depression, a musical tone of the pitch of the key is generated, It is characterized in that multiple tones set in the key split function are overlaid and sounded simultaneously. The present invention is also characterized in that the specific note key is the lowest note key or the highest note key.

According to the above feature, in the split mode, when the split point is set to a specific key such as the lowest note key or the highest note key, no sound is produced by the split function and a plurality of split points are divided. A layer (or dual) in which a plurality of tones set in the keyboard are overlaid and sounded is executed.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 2 is a block diagram showing a hardware configuration of the electronic keyboard instrument according to the embodiment of the present invention. In the figure, the CPU 10 and the ROM 1 are connected to the bus line 30.
1, RAM 12, keyboard scan circuit 15, tone generator 1
7, and the external storage device 20 are connected. Each key of the keyboard 16 connected to the keyboard scan circuit 15 is provided with a sensor that outputs a key-on signal, a key-off signal or the like as a detection signal in response to a key press and a key release. Scan the output of this sensor to turn it on.
The off key is detected, and the key pressing strength, that is, the velocity is detected.

A panel section 13 and an external interface 14 are connected to the CPU 10. The external interface is provided for connection with MIDI equipment. The ROM 11 stores control programs for the CPU 10, musical tone waveform data, and demo data (automatic performance data), and the RAM 12 temporarily stores data used by the CPU 10.
The external storage device 20 is a floppy disk drive or the like.

The panel section 13 is provided with an operation panel 131 and a display 132. The operation panel 131 includes a split function selection switch (hereinafter, simply referred to as “split switch”), a tone color setting switch, and the like, which include various switches and a volume, and an indicator light such as an LED. The display device 132 can be configured by a liquid crystal display device, for example.

The tone generator 17 has a plurality of tone generation channels so that a plurality of tones can be simultaneously generated, and synthesizes the tones by, for example, a sine wave addition system. The sound source device 17 has D /
An output device 18 including an A converter, an analog signal processing device, and an amplifier is connected, and a speaker 19 is connected to the output device 18.

The CPU 10 uses the program, key information (pitch, velocity, etc.) input from the keyboard 16 and tone color, tempo, rhythm, etc. input from the operation panel 131 to generate a tone generator 1 as a tone generator.
7 is controlled to generate a tone signal based on the waveform data read from the tone waveform memory.

The main routine processing of the electronic keyboard instrument will be described. In the flowchart of FIG. 3, step S
At 1, initialization of various registers and flags is performed. After the initialization, first, in step S2, a panel event process is executed. For panel event processing, operation panel 1
Scheduled processing is performed according to an operation (panel event) such as a switch and volume included in 31. In step S3, key event processing is executed. In the key event process, the presence / absence of a key operation (key event) on the keyboard 16 is determined from the key information, and a process corresponding to the key event is performed.

In step S4, other processing, for example, MIDI processing, that is, MIDI processing with an external device is performed.
Information transmission / reception processing, automatic performance processing, that is, processing for reading automatic performance data and producing sound when the automatic performance mode is selected by a mode selection instruction input from the operation panel 131 are performed.

Next, the main part of the panel event process will be described. FIG. 4 is a diagram showing a main part of the operation panel 131.
The operation panel 131 is provided with a tone color switch group 21 including n tone color switches so that a plurality (n types) of tone colors can be set. A split switch 22 is provided adjacent to the tone color switch group 21.

FIG. 5 is a flowchart showing the panel event processing. In FIG. 5, in step S20,
It is determined whether or not there is an on event of the split switch. If step S20 is positive, step S21
Then, it is determined whether or not the split function selection flag (hereinafter, simply referred to as “split flag”) is set (= 1). If step S21 is affirmative, the process proceeds to step S23 and the split flag is reset (= 0). On the other hand, if step S21 is negative, step S22
Go to and set the split flag. Step S2
At 4, other switch processing is performed. Other switch processing includes tone color setting switch processing.

As described above, when the split switch is operated, the split flag is switched to the state opposite to the current state. When step S20 is negative, that is, when there is no split switch on event, steps S21 to
S23 is skipped and the split flag is maintained as it is.

FIG. 6 is a flowchart showing a tone color setting process included in the other switch process (step S24) of the panel event process. Step S24
At 1, the variable m indicating the switch number is set to "1". In step S242, it is determined whether or not there is an on event of the tone color switch m. If step S242 is affirmative, the process proceeds to step S243, and it is determined whether or not the split switch 22 is turned on. Step S24
If 3 is affirmative, the process proceeds to step S244, and the tone color set in the tone color switch m is selected as the low tone side tone color. When step S243 is negative, step S24
In step 5, the tone color set in the tone color switch m is selected as the high tone side tone color. If the on event of the tone color switch m has not occurred, steps S243 to S2.
45 is skipped.

In step S246, the variable m is incremented. In step S247, it is determined whether or not all the tone color switches have been scanned depending on whether the variable m exceeds the number n of tone color switches. If this determination is negative, the process proceeds to step S242. When all the tone color switches have been scanned, this process ends.

FIG. 7 is a flow chart showing the key event process. Here, the 88-key keyboard (key number 0
~ 87) is assumed. The split point can be set for all keys, and the keys on the treble side including the key set for the split point belong to the treble range. When the keyboard 16 is played while pressing the split switch 22, the key range is divided with the pressed key as the split point.

In step S31, the variable k indicating the key number is set to "0". In step S32, it is determined whether or not there is an on event of the key k. When there is no on event of the key k, the process proceeds to step S33, and it is determined whether or not there is an off event of the key k. If there is no off event of the key k, the process proceeds to step S34 and the variable k is incremented. In step S35, the variable k is set to "8.
8 ”, it is determined whether scanning of all keys has been completed. If step S35 is negative, the process proceeds to step S32. Thus, steps S32 to S35 are repeated until the scanning of all 88 keys is completed.

If there is an on event for the key k, the affirmative decision is made in step S32 and the operation proceeds to step S36. In step S36, it is determined whether or not the split switch 22 is pressed. If step S36 is positive, the process proceeds to step S37 and the key k is stored as a split point.

If step S36 is negative, the program proceeds to step S38 and it is determined whether or not the split flag is set. If the split flag is not set, the process proceeds to step S39, and a tone having a tone pitch of the key k is generated with a treble tone color.

If the split flag is set, the process proceeds to step S40, and it is determined whether the key k is higher than the split point. If the result at step S40 is affirmative, the process proceeds to step S41 to generate a tone having the tone pitch of the key k with the high tone side tone color. In a succeeding step S42, it is determined whether or not the split point is the key number "0", that is, whether or not the split point is set to the lowest tone key.

If step S42 is positive, step S4
Proceeding to step 3, the musical tone of the pitch of the key k is generated with the low tone side tone color.
If step S42 is negative, the process proceeds to step S33.
If step S40 is negative, the process proceeds to step S44 to generate a tone having the tone pitch of the key k with the low tone side tone color, and then proceeds to step S33.

As described above, when the split point is set for the lowest tone key, the treble tone color is produced in step S41, and the bass tone color is produced in step S43. That is, simultaneous sound generation (layers) of a plurality of tones is realized.

When the off event of the key k occurs, the affirmative determination is made in step S33, the process proceeds to step S45,
Mutes the musical sound generated in the on event of the key k.

FIG. 1 is a block diagram showing the main functions of the split mode, showing the functions when the split mode is selected by the split switch. In the figure, the key depression detection unit 23 takes in the scan result of the keyboard scan circuit 15 and outputs a key-on signal or a key-off signal and velocity data of the key in which a key event has occurred. Split point storage unit 24
Stores a key number corresponding to the key-on signal as a split point when the key-on signal is generated while the tone color split switch 22 is being pressed.

The tone color setting section 25 stores the tone color information associated with the pressed switch in the tone color switch group in the high tone color storage section 26 as the high tone side tone color. Also,
When one of the tone color switch groups 21 is pressed while the split switch 22 is being pressed, the tone color setting unit 25 stores the tone color associated with the switch in the low tone color storage unit 27 as the low tone side tone color. .

When the key-on signal is input, the split point discriminating unit 28 receives the split point storage unit 24.
Then, the split point is read and the level of the key-on number (the key number corresponding to the key-on signal) for the split point is determined. At the same time, it is determined whether or not the split point is the lowest pitch.

If the key-on number is on the high tone side above the split point, the tone color information stored as the high tone color is read from the high tone color storage unit 26 and input to the waveform memory 29 as the read address. On the other hand, if the key-on number is on the low tone side below the split point, the tone color information stored as the low tone color is read from the low tone color storage unit 27 and input to the waveform memory 29 as the read address. If the split point is the lowest tone, the waveform memory 2 reads out the tone color information of both the low tone color and the high tone color regardless of the key-on number.
Enter in 8.

The waveform memory 29 stores waveform data for each tone color, and supplies the waveform data to the tone generator 17 in response to an input read address. The waveform data is read at a pitch corresponding to the key-on signal. The tone generator 17 generates a tone signal based on the waveform data read from the waveform memory 29 and the velocity input from the key depression detecting unit 23. When the key-off signal is input from the key-depression detection unit 23, the sound source device 17 executes the mute procedure.

As described above, according to the present embodiment, when the split point is set to the lowest note key, it is possible to prohibit the sound generation by the split function and sound the layer in response to the key depression. The split point scheduled for layer sounding is not limited to the lowest note. In short, when the key specified in advance is selected as the split point, the pronunciation according to the split function may be prohibited and the layer pronunciation may be performed.

For example, when the split point is set to the highest note key, sound may be generated in layers. In this case, when a low-pitched key equal to or lower than the highest-pitched key is pressed, a high-pitched tone color is generated.

Further, the specific note key is not limited to one key, but may be specified by a range. For example, when a key with a lower key range than the planned key is designated as the split point, the layer is executed. Conversely, if a key with a higher key range than the planned key is designated as the split point, the layer may be executed.

[0036]

As is apparent from the above description, according to the inventions of claims 1 to 3, the split point for selecting the split mode is not provided individually with the mode selection switch for the layers. By setting, the layer function that simultaneously generates multiple tones can be realized. Therefore, multiple functions can be realized without increasing the number of switches. Further, since a plurality of tones are set in the split mode, even if a layer function for similarly setting a plurality of tones is included in the split mode, the player does not feel uncomfortable.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main function of an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an overall configuration of an electronic musical instrument according to an embodiment of the present invention.

FIG. 3 is a flowchart of a main routine process of the electronic keyboard instrument according to the embodiment of the present invention.

FIG. 4 is a diagram showing an example of switches on an operation panel.

FIG. 5 is a flowchart of panel event processing.

FIG. 6 is a flowchart of a tone color setting process.

FIG. 7 is a flowchart of key event processing.

[Explanation of Codes] 10 ... CPU, 17 ... Sound source device, 13 ... Panel unit,
16 ... keyboard, 21 ... tone color switch, 22 ... split switch, 23 ... key detection section, 24 ... split point storage section, 25 ... tone color setting section, 26 ... treble tone color storage section, 27 ... low tone color storage section, 28 ... Split point discriminator

Claims (3)

[Claims] 1. An electronic musical instrument having a key split function for dividing a key range of a keyboard by split points and generating a musical tone with a tone color assigned to each divided key range, wherein the split point is set to a specific note key. If the key split function is not activated, the tone of the pitch of the key is responded to by pressing a key, and a plurality of tones set by the key split function are overlaid at the same time. And electronic musical instruments. 2. The electronic musical instrument according to claim 1, wherein the specific note key is a lowest note key. 3. The electronic musical instrument according to claim 1, wherein the specific note key is a highest note key.