JP2002032082A - Keyboard information generating device of electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard information generating device of an electronic musical instrument which can reduce the physical disorder that a player feels when playing the electronic musical instrument in stringed instrument playing mode. SOLUTION: When a key is pressed (affirmative judgement in step S14), it is judged (step S21) whether or not the key is in sound generation and when so, a muting process is performed (step S22). When the key is released (inaffirmative judgement in step S14), it is judged whether the key releasing speed VEL is faster than a threshold speed V0 and when the key releasing speed VEL is faster than the threshold speed V0 (affirmative judgement in step S31), a sound generating process wherein maximum after-touch data AT are reflected is performed (step S32). When the key releasing speed VEL is slower than the threshold speed V0 (inaffirmative judgement in step S31), on the other hand, no sound is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard information generator for an electronic musical instrument, and more particularly to a keyboard information generator for an electronic musical instrument capable of performing a performance similar to a stringed musical instrument.

[0002]

2. Description of the Related Art An electronic musical instrument with a keyboard which generates a performance sound similar to a stringed musical instrument has already been proposed by the present inventors. As one of the prior arts, for example,
There is one described in No. 12080.

Generally, in playing a stringed musical instrument, when a string is played, a musical tone is generated until the vibration of the string stops, and when a finger touches the string, the musical tone stops generating. Also, during a performance, the player may repeatedly play the same string, and a phenomenon occurs in which the sound generated from the string disappears momentarily at the beginning of the operation.

Therefore, in the prior art, when a stringed musical instrument play mode is selected in an electronic musical instrument, a sound is generated by pressing a key of a player, and a mute process is not performed even when the key is released, that is, a release of a sound is performed. There are disclosed a technique for making a musical tone continue to sound even when the key is keyed, and a technique for silencing when a key being sounded is pressed again.

[0005]

However, when the above-mentioned prior art electronic musical instrument is played in the stringed musical instrument playing mode, there is a problem that the player feels strange.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a keyboard information generating apparatus for an electronic musical instrument which can solve the above-mentioned problem and can reduce a sense of discomfort given to a player when the electronic musical instrument is played in a stringed musical instrument playing mode.

[0007]

In order to achieve the above object, the present invention provides a means for detecting a key release timing, a means for detecting a key release speed, and a method for detecting a key release speed. Means for comparing the speed with a predetermined threshold, and sounding processing means for sounding at the key release timing when the key release speed is equal to or higher than the threshold, and for not generating sound when the key release speed is lower than the threshold. The first feature lies in the point of having.

According to this feature, the electronic musical instrument is sounded at the key release timing and when the key release speed is equal to or higher than the threshold value. Can be played with the same feeling as a stringed instrument that sounds audible only when is greater than or equal to a predetermined value.

The present invention further comprises means for sensing the strength of key depression, means for sensing the speed of key depression, or means for sensing the speed from key depression to key release. A second feature of the processing means is that the processing means reflects the strength of the key depression, the speed of the key depression, or the speed from the key depression to the key release to generate sound. According to this feature, the electronic musical instrument can be played with a feeling similar to that of a stringed musical instrument whose volume changes according to the strength of the pull of the string.

A third feature is that the apparatus further comprises means for judging whether or not the key is sounding when the key is pressed, and means for performing a silencing process when the key is sounding. According to this feature, if the same string is repeatedly played, the sound generated from the string is momentarily erased at the beginning of the operation. You will be able to play electronic musical instruments as if you were playing.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. According to the present invention, when a key of an electronic musical instrument is considered to be a string of a stringed instrument, an operation of pressing a key with a finger on the key is an operation of pressing the string,
In other words, the operation is similar to the operation of pulling the strings, and the operation of the key to return by its own reaction force is similar to the release of the strings.

First, an outline of the configuration of an example of an electronic musical instrument (electronic piano) to which the present invention is applied will be described with reference to FIG. In the figure, a central processing unit (CPU) 1 has a ROM
The operation of each section of the electronic musical instrument is controlled according to a control program stored in the second program memory section. R
The OM2 stores a program for controlling the operation of the entire electronic musical instrument, various fixed data used by the CPU 1, and the like. These programs and fixed data are
U1 is accessed via the system bus SB. The RAM 3 stores status information of the apparatus and is used as a work area for the CPU 1. Various registers, buffers, flags, and the like for controlling the electronic musical instrument are defined in the RAM 3, and the RAM 3 is accessed by the CPU 1 via the system bus SB.

The operation panel 5 has various switches such as a power switch, a tone color selection switch, a string instrument performance mode selection switch, and a display for displaying predetermined information. The panel scan circuit 4 checks the set / reset state of each switch provided on the operation panel 5, detects panel switch data in an on state, and sends the data to the CPU 1.

The keyboard 7 is composed of a plurality of keys and keys depressed thereon.
And a keyboard switch that opens and closes in response to key release. As the keyboard and keyboard switch, for example, those described in the above-mentioned Japanese Patent Application Laid-Open No. Hei 6-12080 can be used. The keyboard scan circuit 6 checks the state of the keyboard switch, and from a signal indicating its on / off state,
In addition to generating touch data indicating the strength (speed) of keyboard touch, on / off information and its keyboard number (key code) are output. The on / off information, the keyboard number, and the touch data are sent to the CPU 1 via the system bus SB.

A tone generator circuit 8 reads out original sound waveform data corresponding to a signal output from the CPU 1 from an original sound waveform memory 9, multiplies the original sound waveform data by an envelope, and generates a DSP (digital signal processor) 10 as a tone signal a.
Output to Note that in the stringed instrument playing mode, the tone of a stringed instrument such as a guitar is assigned to the electronic musical instrument, and when a keyboard performance is performed, a performance sound as if playing the stringed instrument is obtained.

The DSP 10 includes a frequency characteristic adjusting circuit 10
a and an effect circuit 10b. The effect circuit 10b can generate various effects such as reverb and chorus. The tone signal b output from the DSP 10 is converted into an analog signal by a D / A converter (not shown), amplified by a main amplifier, and sent to a speaker system including left and right high-frequency speakers and low-frequency speakers. Will be played.

Next, the function of one embodiment of the present invention will be described with reference to FIG.
This will be described with reference to the flowcharts (a) to (e). When the player selects the stringed instrument playing mode on the operation panel 5, the processing of FIG. 2A is started. FIG. 2A shows a main routine of this function.

In step S1, data or the like temporarily stored in the RAM 3 or the like of the electronic musical instrument is initialized. When the initialization is completed, the process proceeds to step S2, where key processing is performed, and then, in step S3, aftertouch processing is performed. In the processing of steps S2 and S3, when the performance is finished,
This is repeated until the stringed instrument playing mode is released.

The details of the key processing in step S2 are shown in FIG.
This will be described with reference to (b). In step S11, the keyboard scanning circuit 6 scans the keyboard 7. Step S
At 12, the CPU 1 determines whether or not an event has occurred, that is, whether or not a key operation has been performed. If this determination is negative, the process ends without any processing.

On the other hand, if it is determined that the event has occurred, the process proceeds to step S13. In step S13, whether the event is a key-on event or a key-off event is stored in a KEV register in the RAM 3, for example. The operation speed (key pressing speed or key release speed) at that time is stored in the VEL register, and the key code of the key is stored in the KC register. In step S14, it is determined whether the event is key-on or key-off.
The process proceeds to step S5, where the ON process is performed. If the key is OFF, the process proceeds to step S16 to execute the OFF process.

The details of the ON processing are as follows. As shown in FIG. 3C, it is determined whether or not the key that has caused the ON event is currently sounding. Proceeding to S22, the mute processing is performed. Therefore, in a stringed musical instrument, when the same string is repeatedly played, the same phenomenon as the phenomenon that the sound generated from the string disappears momentarily at the beginning of the operation can be realized in the electronic musical instrument. Thereafter, the process proceeds to step S23, where the after touch data (AT) stored in the buffer is reset. On the other hand, if the sound is not being generated, the process proceeds from step S21 to S2.
Proceeding to 3, the after touch data (AT) stored in the buffer is reset.

Next, the details of the off process are as follows, as shown in FIG. 3D, whether the key release speed VEL stored in the VEL register is higher than a preset threshold speed V0. Is determined, and if the determination is affirmative, the process proceeds to step S32 to perform a sound generation process using the after touch data AT as a parameter. The sound processing is
A process is performed to reflect the parameter on the volume, tone, and the like.
The threshold speed V0 may be a value initially set by the manufacturer for the musical instrument or a value determined after the user purchases the musical instrument, and the threshold speed V0 may be set arbitrarily. The setting operation is performed by a switch in the operation panel 5 in FIG. 1, and the setting value is stored in the RAM 3. The same applies to other embodiments described below.

Next, the details of the after touch process in step S3 will be described with reference to FIG. In step S41, data such as key press pressure is acquired.
In step S42, it is determined whether the acquired new data is larger than the previous after touch data stored in the buffer. If the determination is affirmative, the process proceeds to step S43 to store the new data in the buffer. Is stored. That is, the previous data is rewritten with the new data. On the other hand, if the determination in step S42 is negative,
Exit without doing anything. Therefore, by the after touch processing, the buffer has the maximum key pressing pressure,
That is, the maximum after touch data AT is held. In addition, not the maximum after touch data,
The average value of the after touch data may be obtained.

Therefore, according to the present embodiment, the key release speed V is determined by step S16, that is, by the process of FIG.
If EL is equal to or higher than the threshold speed V0, a sound generation process is performed in which the maximum after touch data AT stored in the buffer is reflected. On the other hand, if the speed is equal to or lower than the threshold speed V0, the keyboard event process is terminated without sounding. Therefore,
This off processing makes it possible to adapt the electronic musical instrument to the characteristic of a stringed musical instrument that sounds when a string is strongly played and does not sound when a string is weakly played.

Next, the function of the second embodiment of the present invention will be described with reference to FIGS. In this embodiment, unlike the first embodiment, the tone generation process is performed not by using the after touch data as a parameter but by the speed of key depression (on velocity) as a parameter.

FIG. 3A shows a main routine. In step S51, the same initialization processing as that in FIG. 2 is performed. In step S52, key processing is performed. This key processing is performed until the performance ends and the stringed instrument playing mode is released.
Repeated.

The details of the key processing (step S52)
This is shown in FIG. This flowchart corresponds to step S6.
Except for the detailed functions of the ON processing of S5 and the OFF processing of S66, the processing is the same as that of FIG.

The detailed processing in step S65 is described in FIG.
As shown in (c), in step S71, it is determined whether or not the key having the on-event is being sounded. If this determination is affirmative, the process proceeds to step S72, where a mute process is performed. On the other hand, if the result is negative, the process jumps from step S72 and proceeds to step S73.
In step S73, the key depression speed (on velocity) VEL is stored in the NV register.

On the other hand, in the off processing of step S66, step S81 of the off processing shown in FIG.
At, it is determined whether or not the key release speed stored in the VEL register is higher than a preset threshold speed V0. If the determination is affirmative, the process proceeds to step S82,
A tone generation process is performed using the key pressing speed VEL stored in the NV register as a parameter.

As described above, in the second embodiment, when a key is released, a tone generation process using the key pressing speed VEL as a parameter can be performed at that timing.

Next, the function of the third embodiment of the present invention will be described with reference to FIGS. This embodiment is characterized in that sound generation processing is performed using a speed from a key being pressed to a key being released as a parameter.

FIG. 4A shows a main routine of the present embodiment, which is the same as the flowchart of FIG. 3A. Also,
The key processing in FIG. 4B is the same as the flowcharts in FIGS. 2B and 3B except for the detailed functions of steps S105 and S106, and thus the description is omitted.

The ON processing in step S105 is performed as shown in FIG.
As shown in (1), in step S111, it is determined whether or not the key having the on-event is being sounded. If this determination is affirmative, the process proceeds to step S112, where a mute process is performed. On the other hand, if the result is negative, step S112 is jumped and the process proceeds to step S113. In step S113, the timer counter TC [KC] corresponding to the key is reset.

Next, as shown in FIG. 3D, in the off process in step S106, if it is determined in step S121 that the key release speed VEL is equal to or higher than the threshold speed V0, the process proceeds to step S122. To 1 / TC [KC],
That is, a tone generation process is performed using the speed from the key being pressed to the key being released as a parameter.

The timer counter TC [KC]
As shown in step S131 of FIG. 11E, the time when the ON process occurs is set as the start time of the count, so that the time from when the key is pressed until the key is released is measured. Will be.

According to each of the above-described embodiments, when the electronic musical instrument is set to the stringed musical instrument play mode and the keyboard is operated so as to play a string, a tone similar to the stringed musical instrument can be produced from the time when the key is released. You will be able to play a keyed electronic musical instrument as if you were performing.

FIG. 5 shows a functional block diagram of the present invention. The key release timing detecting means 21 detects the timing at which the key is released. The key release speed detecting means 22 detects the speed from when the key is turned on to when it is turned off. Comparison means 2
4 is a key release speed V detected by the key release speed detecting means 22.
x is compared with a threshold value 23 (threshold speed V0), and a signal of the comparison result is output to the sound generation processing means 25. Pronunciation processing means 25
When receiving the signal of the comparison result of Vx ≧ V0, the tone generator generates a tone signal at a key release timing from the key release timing detecting means 21 and has a tone color similar to that of a stringed musical instrument.

The sounding processing means 25 includes a key pressing strength and a key pressing speed from a key pressing strength detecting means 26, a key pressing speed detecting means 27, or a key pressing to key releasing speed detecting means. Or, data of the speed from the key depression to the key release is obtained, and a sound generation process for parameterizing these data is performed.

[0039]

As is apparent from the above description, according to the present invention, if the key release speed is equal to or higher than the threshold, the key is released at the key release timing, and if the key release speed is lower than the threshold, the key is not sounded. This makes it possible for the player to play the electronic musical instrument with the same feeling as playing a stringed instrument. That is, in a stringed musical instrument, an effect equivalent to that in which the sound is generated when the string is strongly pressed with a finger to a certain degree or more, and the sound is not generated when the finger is gently released from the string, can be given to the electronic musical instrument.

Also, the electronic musical instrument can be made to sound by reflecting the strength of key depression, the speed of key depression, or the speed from key depression to key release. An electronic musical instrument can be played with the same feeling as pulling a string of a stringed instrument strongly or weakly.

Further, if a depressed key is sounding, a silencing process is performed. Therefore, when the same string is continuously played on a stringed instrument, a sound generated from the string is momentarily generated at the beginning of the operation. Electronic instruments can have the characteristic of disappearing string instruments. Therefore, when the electronic musical instrument is played in the stringed musical instrument playing mode, the uncomfortable feeling of the player is reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an electronic musical instrument to which the present invention is applied.

FIG. 2 is a flowchart showing functions of an embodiment of the present invention.

FIG. 3 is a flowchart showing functions of a second embodiment of the present invention.

FIG. 4 is a flowchart illustrating functions of a third embodiment of the present invention.

FIG. 5 is a functional block diagram showing a configuration of a main part of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... Panel scan circuit, 5 ... Operation panel, 6 ... Keyboard scan circuit, 7
... keyboard, 7a ... key, 8 ... tone generator circuit, 10 ... DSP, 21
... Key release timing detecting means, 22 ... Key release speed detecting means,
23: threshold value, 25: sound generation processing means, 26: key pressing intensity detecting means, 27: key pressing speed detecting means, 28: key pressing to key releasing speed detecting means.

Claims (6)

[Claims] A means for detecting a key release timing; a means for detecting a key release speed; a means for comparing the key release speed with a predetermined threshold speed; Keyboard information generation means for an electronic musical instrument, comprising: sound generation processing means for generating a sound at the key release timing when the speed is equal to or higher than the threshold value, and for not generating sound when the speed is lower than the threshold value. apparatus. 2. The electronic device according to claim 1, further comprising: means for sensing the strength of the key depression, wherein the sound generation processing means produces a sound reflecting the strength of the key depression. Keyboard information generator for musical instruments. 3. The electronic device according to claim 1, further comprising: means for sensing the speed of key depression, wherein said sound generation processing means produces a sound reflecting the speed of key depression. Keyboard information generator for musical instruments. 4. The apparatus further comprises means for sensing a speed from key depression to key release, wherein said sound generation processing means produces a sound reflecting the speed from said key depression to key release. The keyboard information generator for an electronic musical instrument according to claim 1. 5. The apparatus according to claim 1, wherein the threshold value can be set arbitrarily. 6. The apparatus according to claim 1, further comprising: means for judging whether or not the key is sounding when the key is pressed, and means for performing a silencing process if the key is sounding. A keyboard information generator for an electronic musical instrument according to any one of the above.