JP2008096526A - Electronic keyboard instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce discomfort of sound volume, and effectively use a sound output channel, when the same key is turned on within a predetermined time period. <P>SOLUTION: When to when second key-on is detected, within the predetermined time after detecting first key-on, sound is output based on the second key-on detection by being superposed on the sound output based on the first key-on detection. When when the second key-on is detected after the predetermined time or more elapses, the sound is output based on the second key-on detection, after releasing sound output based on the first key-on detection. Thereby, volume/envelope of sound output based on the first key-on detection is kept as it is, and no sound discomfort is provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic keyboard instrument, and more particularly to a technique suitable for use with an electronic keyboard instrument that detects speed and sounding timing at a position close to a string in a hammer system.

  Conventionally, in an electronic keyboard instrument, an electronic keyboard instrument and a mute piano have been obtained that perform speed detection and sounding timing detection at positions close to the strings in the hammer system, and obtain a repeatability similar to that of an actual piano (acoustic piano). The touch detection device has been put into practical use.

  Since the key-off detection point of such a touch detection device is often disposed at a location relatively close to the initial position of the keyboard or hammer, key-on is continuously detected without detecting key-off. For this reason, it is possible to reliably detect repeated hits made at a deep position, and even when a trill performance or the like is performed, it is possible to detect without missing a sound.

  Usually, after striking the hammer, the hammer is caught by a back check or leans against the back check to stop the movement of the hammer. However, when hitting strongly, the hammer may bounce back (hammer bounce).

  At this time, after turning on once, it bounces back to the speed detecting means again at the bound, and second key-on information is generated. The strength of the second key-on information is smaller than the strength of the first key-on information (first key-on information).

  At this time, the method of rapidly releasing the musical sound with the first on-information that is the same key and generating the second on-information as usual has the advantage of turning the sound source channel to the sound of another key. In this key, there is a problem that the sound based on the second key-on information remains and the volume does not correspond to the performance.

  Further, although it is not a type of touch detection device that is continuously turned on, in order to solve such a problem, for example, in the electronic musical instrument described in Patent Document 1, when sounding is performed based on the second key-on information. In order to use the string striking strength in the first key-on information, a device for eliminating the uncomfortable feeling of volume is taken.

JP-A-2-259798

  However, when the uncomfortable feeling of volume is eliminated by using the technique of Patent Document 1, there is a problem that the peak of the envelope shifts to the second on position instead of the original first on position. It was.

  In addition, with the method of always assigning the same key ON to another channel, there is no problem with the volume feeling or the peak position of the envelope. There was a problem that it might occur.

  In view of the above-mentioned problems, the present invention can achieve both harmony of volume feeling and efficient use of the sound channel when the same key is turned on within a predetermined time. The purpose is to do.

The electronic keyboard instrument of the present invention is an electronic keyboard instrument having touch detection means for detecting the speed of the hammer and the sounding timing at a position close to the string of the hammer system, and based on the key-on detected by the touch detection means. When a tone generation unit that performs a tone generation process and performs a mute process based on a key-off, and a key-on that is the same as the pitch being generated is detected, a second key-on is detected after the first key-on is detected. Key-on-interval management means for measuring the time until the sound is generated; and sound generation control means for controlling the operation of the tone generation means based on the key-on interval measured by the key-on interval management means.
Another feature of the electronic keyboard instrument according to the present invention is that the sound generation control means is configured such that the interval from when the first key-on is detected to when the second key-on is detected is within a predetermined time. If detected by the key-on interval management means, the musical tone generating means is controlled so as to perform a sound generation process based on the second key-on in a manner superimposed on the sound generation performed based on the first key-on detection, If the key-on-interval management means detects that the interval from when the first key-on is detected until the second key-on is detected has passed a predetermined time, the first-time key-on detection is performed. The musical tone generating means is controlled to perform a sound generation process based on the second key-on after releasing the sound generated based on the key.
Another feature of the electronic keyboard instrument of the present invention is that the sound generation control means is configured such that the interval from the detection of the first key-on to the detection of the second key-on is within a predetermined time. When detected by the key-on interval management means, the tone generation means is controlled so as to ignore the second key-on.
Another feature of the electronic keyboard instrument of the present invention is that the sound generation control means is configured such that the interval from the detection of the first key-on to the detection of the second key-on is within a predetermined time. When detected by the key-on interval management means, the tone generation means is controlled so as to ignore the second key-on when the key-on velocity difference is large.

According to the present invention, when the interval from when the first key-on is detected to when the second key-on is detected is within a predetermined time, the sound generation performed based on the first key-on detection is performed. In addition, the sound generation process based on the second key-on is performed, and the interval from the detection of the first key-on to the detection of the second key-on has passed a predetermined time or more. Is performed based on the first key-on detection because the sound generation performed based on the first key-on detection is released and then the sound generation process is performed based on the second key-on. The sound volume and envelope can be left as they are, and it is possible to prevent a sense of incongruity from occurring.
Further, since the sound channel can be quickly released in normal performance and repeated hits, it is only necessary to use the sound channel when a less frequent bounce occurs.

(First embodiment)
FIG. 1 is a block diagram showing a first embodiment of an electronic piano to which the present invention is applied.
1 is connected to a system bus 100 via a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, and a panel scan circuit 104a. The operation panel unit 104, the sensor 105 connected via the touch detection circuit 105a, and the sound source LSI 106 are connected to each other, and various commands and data are transferred to these devices through the system bus 100. It is configured.

  The tone generator LSI 106 includes a DSP (Digital Signal Processor) 120 for processing a musical sound signal output therefrom, a D / A conversion circuit 121 for converting the processed musical signal into an analog signal, and amplifying it. A main amplifier 122 is provided. A speaker 123 is provided for sounding the original sound sequence signal output from the main amplifier 122 to the outside.

  The CPU 101 controls each unit of the electronic piano according to a control program stored in a program memory storage unit of the ROM 102. Further, the application program stored in the program memory storage unit is executed, and if necessary, the RAM 103 is used as a work area, and data processing is performed using various fixed data stored in the ROM 102.

  As described above, the ROM 102 stores various fixed data used by the CPU 101 in addition to a program for controlling the entire electronic piano.

  The RAM 103 stores apparatus status information and is used as a work area for the CPU 101. Various registers and flags for controlling the electronic piano are defined in the RAM 103, and the RAM 103 is accessed by the CPU 101 via the system bus 100.

  The operation panel unit 104 is provided with various switches such as a power switch and a tone color selection switch and a display for displaying predetermined information. The panel scan circuit 104a interposed between the operation panel unit 104 and the system bus 100 checks the set / reset state of each switch (not shown) provided in the operation panel unit 104 and is turned on. Panel switch data is detected and sent to the CPU 101.

  As will be described later, the sensor 105 performs speed detection and sound generation timing detection at a position close to a string in the hammer system so that a repetitive strike performance close to that of an actual piano (acoustic piano) can be obtained. ing. The touch detection circuit 105a interposed between the sensor 105 and the system bus 100 checks the operation state of the keyboard based on the signal output from the sensor 105, and generates touch data indicating the strength (speed) of the keyboard touch. While generating, it outputs ON or OFF information and its keyboard number. The ON / OFF information, keyboard number, and touch data are sent to the CPU 101 via the system bus 100.

  The tone generator LSI 106 reads out the original sound waveform data corresponding to the signal output from the CPU 101 from the waveform memory 107, multiplies the musical sound waveform data by an envelope, and outputs it as a musical sound signal.

  Next, the key-on / key-off detection configuration of this embodiment will be described with reference to FIG. As shown in FIG. 2, the hammer system 1 of this embodiment includes a hammer 2, a hammer shank 3, a catcher 4, a bat 5, and the like, and is pivotally supported by a center pin 6 so as to be rotatable.

  Moreover, it has the 1st switch 10, the 2nd switch 11, and the 3rd switch 21, and these switches 10, 11 and 21 have the hammer system 1 in the housing | casing 12, as shown in FIG. Are arranged at predetermined intervals along the rotation direction. The shutter 9 is formed in a fan shape and is fixed to the catcher 4. The first switch 10, the second switch 11, and the third switch 21 are all photoelectric switches configured to be paired with a light emitting unit (not shown) arranged to face each other with the shutter 9 interposed therebetween. is there.

  The first switch 10 receives light from the light emitting unit when the key is released, and when the key is pressed, the hammer system 1 starts to rotate, and when the damper 13 starts to move away from the string 14, the light from the light emitting unit is emitted by the shutter 9. Shaded. When the key is released and the damper 13 comes into contact with the string 14, the light from the light emitting unit is again blocked by the shutter 9.

  The second switch 11 receives light from the light emitting unit when the key is released, and the hammer system 1 starts to rotate when the key is pressed. Light is blocked. Then, the string is struck, and the hammer system 1 starts to rotate in the opposite direction by the reaction, and receives light from the light emitting unit again at a certain time.

  The third switch 21 receives the light from the light emitting portion when the key is released, and the hammer system 1 starts to rotate when the key is pressed, and the light from the light emitting portion is immediately before the hammer 2 hits the string 14. Is shielded from light. Then, the string is struck at the time of subsequent rotation, and the hammer system 1 starts to rotate in the opposite direction by the reaction, so that the light from the light emitting unit is received again at a time before the certain time. It has become.

Next, the control at the time of key-on detection in the hammer system 1 configured as described above will be described. First, the entire process will be described with reference to the flowchart of FIG.
As shown in FIG. 3, when the process is started, an initial process is performed in step S31. By this process, for example, the state of the memory or the like is set so as to match a predetermined method.

  Next, panel event processing is performed in step S32. As a result, the scan process of the operation panel unit 104 is performed, and the set / reset state of each switch (not shown) provided in the operation panel unit 104 is checked by the panel scan circuit 104a and is turned on. Panel switch data is detected and sent to the CPU 101.

Next, in step S33, touch event processing is performed. This processing is performed when an event occurs on the keyboard as will be described later.
Next, in step S34, MIDI event processing is performed. In this case, event processing related to the keyboard operation is performed, and MIDI event processing such as “play the keyboard (note on)” and “release the finger (note off)” is performed. Next, in step S35, after other processes are performed, the process returns to step S32, and the processes in steps S32 to S35 described above are repeated.

FIG. 4 is a flowchart illustrating an example of the touch event process performed in step S33 of FIG.
As shown in FIG. 4, in the touch event process, an on-event process is first performed (step S41). Next, it progresses to step S42, an off event process is performed, and another process is finally performed (step S43).

Next, the on-event process performed in step S41 of FIG. 4 will be described with reference to the flowcharts of FIGS.
FIG. 5 shows on-event processing that is generally performed when the processing of this embodiment is not employed.

  As shown in FIG. 5, in the on-event process, in the first step S51, it is determined whether or not “same pitch is sounding?”. If the result of this determination is that “the same pitch is sounding”, the process proceeds to step S52 to mute the same pitch, and then the process proceeds to step S53. On the other hand, if it is not “same pitch is sounding?”, The process proceeds directly to step S53. In step S53, "sound generation process in new channel" is performed. Next, a sound generation / counter table process is performed in step S54. The contents of each process performed in steps S51 to S54 described above will be described in detail with reference to the flowchart of FIG.

Next, on-event processing performed in the present embodiment will be described with reference to FIG.
First, in step S61, it is determined whether or not “same pitch is sounding?”. This determination is made based on whether or not there is a coincidence by examining the pitch (KeyNo) recorded in the sound generation / counter table shown in FIG.

  If the result of determination in step S61 is not “Is the same pitch sounding?”, The process proceeds directly to step S65. If “same pitch is sounding”, the process proceeds to step S62, and it is determined whether the count number of the same pitch is a predetermined value or more. This determination is made based on whether the count number recorded in the sound generation / counter table is read and the value is equal to or greater than a predetermined value.

  If the result of determination in step S62 is that the number of counts is greater than or equal to a predetermined value, the process proceeds to step S63, where the same pitch is silenced. This process is a process for forcibly ending sound generation by transferring and setting the parameters for the release phase to the channel of the sound source that is sounding the same pitch. If the count is less than or equal to the predetermined value, the process proceeds to step S65.

  Next, the process proceeds to step S64, and a process of deleting from the sound generation / counter table is performed. This process is performed by setting the table's pitch (KeyNo) portion having the pitch after the mute processing to “0”. Thereafter, the process proceeds to step S65, and “performs sound generation processing on a new channel”. In this process, various parameters necessary for sound generation are set in the sound source LSI 106 and sound generation is started.

  Next, in step S66, processing for recording in the sound generation / counter table is performed. This records the current pitch (1 to 88) in a place where the pitch (KeyNo) of the pronunciation / counter Table is “0”, and resets the count value to “0”. The count value is counted up by the timer of the CPU 101 as needed separately from this process, and when the count value reaches a predetermined time, the count value is maintained without being counted up.

  FIG. 7 shows an example of the pronunciation / counter table. In this example, “pitch (KeyNo)” and “count value” are recorded, and “1 to 88” is recorded during sound generation, and “0” is recorded during mute. .

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to the flowchart of FIG.
The processing content of each process of step S81-step S86 in FIG. 8 is the same as the processing content of each process of step S61-step S66 in FIG.

  The difference from the flowchart of FIG. 6 is that, in step S82, it is determined whether or not the count number of the same pitch is greater than or equal to a predetermined value. It is. This indicates that the second key-on event occurring at the same pitch within a predetermined time after the occurrence of the key event is ignored.

  By processing in this way, if a key-on event occurs twice at the same pitch within a predetermined time, the sound generation process based on the second key-on event is not performed. As a result, the volume / envelope by the first key-on event remains as it is, so that it is possible to perform processing without a sense of incongruity in hearing. In addition, consumption of the sound channel can be suppressed.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to the flowchart of FIG.
The processing content of each process other than step S93 in FIG. 9 is the same as the processing content of each process of step S61 to step S66 in FIG.

  In this embodiment, if it is determined in step S92 whether or not the count number of the same pitch is greater than or equal to a predetermined value, if the count number of the same pitch is not greater than or equal to the predetermined value, the process proceeds to step S93 and velocity is increased. It is determined whether or not the difference is large. This determination is made by reading the velocity recorded in the corresponding pitch in the sound generation / counter table and comparing it with the current velocity.

  As a result of this comparison, for example, if the difference is “40” or more, it is determined that the difference is large. Further, as another method of comparison, a determination method in which it is determined that the difference is large if it is equal to or less than “50%” of the original velocity can be considered.

Next, the result of the above-described processing will be described with reference to the waveform diagram of FIG.
As shown in FIG. 10A, when all of the first detection signal S1, the second detection signal S2, and the third detection signal S3 are inverted to the “L” level, it is detected as a “key-on event”. . The example shown in FIG. 10A shows an example in which the first key-on ON1 and the second key-on ON2 are detected twice. Further, when all of the first detection signal S1, the second detection signal S2, and the third detection signal S3 are inverted to the “H” level, it is detected as a “key-off event”.

When the detection signals S1 to S3 shown in FIG. 10A are input, FIG. 10B shows an example (conventional example) where no processing of this embodiment is performed.
As shown in FIG. 10B, the first envelope b1 generated by the “first key-on event” is silenced when the “second key-on event” occurs, and the second envelope b2 is Generated.

  As described above, since the “second key-on event” is an erroneously detected key event, the second envelope b2 should be generated by the “first key-on event” that is the original “key-on event”. It is smaller than the envelope (envelope b1 ′ shown by a broken line).

  FIG. 10C shows an example in which the processing of the first embodiment described above is performed. As shown in FIG. 10C, even when the second key-on ON2 occurs within a predetermined time T1 after the first key-on ON1 occurs, the sound generation based on the first key-on ON1 is not released. And the sound generation process based on the second key-on ON2 is performed as usual.

By doing so, (a) the sound volume / envelope of the sound generation based on the first key-on ON1 remains as it is, so that a sense of incongruity in hearing can be prevented.
In addition, (b) in normal performance / continuous hitting, the sound generation channel can be quickly released, and only a large number of sound generation channels need be used only when the second key-on ON2 due to infrequent bounce.

  FIG. 10 (d) shows an example in which the string striking strength detected by ON1 is used as the first key-on information when the second key-on ON2 is detected (the technique described in Patent Document 1). Yes. In this case, as described above, the peak P1 originally present at the position indicated by the broken line moves to the peak position P2 indicated by the solid line.

FIG. 10E is a diagram showing waveforms when the second embodiment and the third embodiment are applied.
As shown in FIG. 10E, when the second key-on ON2 occurs within the predetermined time T1 after the first key-on ON1 occurs, the second key-on ON2 is ignored as described above. So that the pronunciation process is not performed.
As a result, (a) the sound volume / envelope based on the first key-on ON1 is left as it is, so that a sense of incongruity in hearing can be prevented.
In addition, (b) it is possible to reduce the consumption of the sound generation channel.

(Other embodiments of the present invention)
A program code of software for realizing the functions of the embodiment is provided to an apparatus or a computer in the system connected to the various devices so as to operate various devices to realize the functions of the embodiment. What is implemented by operating the various devices according to a program supplied and stored in a computer (CPU or MPU) of the system or apparatus is also included in the scope of the present invention.

  In this case, the program code of the software itself realizes the functions of the above-described embodiments, and the program code itself and means for supplying the program code to the computer, for example, the program code are stored. The recorded medium constitutes the present invention. As a recording medium for storing the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

  Further, by executing the program code supplied by the computer, not only the functions of the above-described embodiments are realized, but also the OS (operating system) or other application software in which the program code is running on the computer, etc. It goes without saying that the program code is also included in the embodiment of the present invention even when the functions of the above-described embodiment are realized in cooperation with the embodiment.

  Further, after the supplied program code is stored in the memory provided in the function expansion board of the computer or the function expansion unit connected to the computer, the CPU provided in the function expansion board or function expansion unit based on the instruction of the program code Needless to say, the present invention includes a case where the functions of the above-described embodiment are realized by performing part or all of the actual processing.

1 is a block diagram illustrating an overall configuration of an electronic keyboard instrument according to an embodiment of the present invention. It is a figure which shows embodiment of this invention and shows the structural example of the action system (hammer system) which does not operate | move integrally with a keyboard. It is a flowchart which shows embodiment of this invention and demonstrates whole processing. It is a flowchart explaining an example of a touch event process sequence. It is a flowchart explaining an example of the conventional on event process. It is a flowchart which shows embodiment of this invention and demonstrates an example of an on event process. It is a figure which shows embodiment of this invention and shows an example of the sound production | generation / counter Table. It is a flowchart which shows 2nd Embodiment of an on event process. It is a flowchart which shows 3rd Embodiment of an on event process. It is a wave form diagram explaining the result of having performed processing of an embodiment.

Explanation of symbols

100 System bus 101 CPU (Central Processing Unit)
102 ROM (Read Only Memory)
103 RAM (Random Access Memory)
104 Operation Panel 104a Panel Scan Circuit 105 Sensor 105a Touch Detection Circuit 106 Sound Source LSI
121 D / A conversion circuit 122 Main amplifier 123 Speaker

Claims (4)

An electronic keyboard instrument having touch detection means for detecting hammer speed detection and sound generation timing at a position close to a hammer string,
A tone generation unit that performs sound generation processing based on key-on detected by the touch detection unit and performs mute processing based on key-off;
A key-on interval management means for measuring the time from when the first key-on is detected to when the second key-on is detected when the same key-on as the pitch being generated is detected;
An electronic keyboard instrument comprising sound generation control means for controlling the operation of the musical tone generation means based on a key-on interval measured by the key-on interval management means. When the key-on interval management means detects that the interval from the detection of the first key-on to the detection of the second key-on is within a predetermined time, the sound generation control means Controlling the musical sound generating means so as to perform a sound generation process based on the second key-on in a manner superimposed on the sound generation being performed based on the detection;
If the key-on-interval management means detects that the interval from when the first key-on is detected until the second key-on is detected has passed a predetermined time, the first-time key-on detection is performed. 2. The electronic keyboard instrument according to claim 1, wherein the musical tone generating means is controlled to perform a sound generation process based on the second key-on after releasing a sound generated based on the sound.   When the key-on interval management unit detects that the interval from the detection of the first key-on to the detection of the second key-on is within a predetermined time, the sound generation control unit 2. The electronic keyboard instrument according to claim 1, wherein the musical sound generating means is controlled so as to ignore the sound.   When the key-on interval management unit detects that the interval between the detection of the first key-on and the detection of the second key-on is within a predetermined time, the sound generation control unit detects the key-on velocity difference. 2. The electronic keyboard instrument according to claim 1, wherein the musical tone generating means is controlled so as to ignore the second key-on when the second key-on is large.

Images