JP3624780B2 - Music control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a musical sound control apparatus that can simulate musical sounds of musical instruments such as an acoustic piano.
[0002]
[Prior art]
Conventionally, in an electronic musical instrument, a musical sound waveform of a natural musical instrument is sampled and stored in a waveform memory, and when a musical sound is generated, the sampling waveform is read from the waveform memory to generate a waveform signal, and the envelope shape of the waveform signal is controlled. Therefore, it is performed to simulate musical sounds such as a piano. For example, the entire envelope of a musical sound is divided into several steps, and the entire envelope shape is generated from each target value and rate.
[0003]
By the way, in the piano, a damper is provided for each string, and the action of the damper on the string changes according to the operation of the damper pedal and the key. For example, if you press the key without stepping on the pedal, the key will release the damper from the string and the hammer will strike. If you release the key without pressing the pedal, the damper will hit the string and vibrate the string. Is forcibly attenuated and the musical sound is muted.
[0004]
On the other hand, when the pedal is depressed, the damper is kept away from the string, so if you step on the pedal and press the key or press the pedal after pressing the key, the string will vibrate freely even if you release the key. The music continues and decays naturally. Also, if you stop stepping on the pedal at this time, the sound will be attenuated by the damper.
[0005]
In this way, when the key is released without stepping on the pedal, or when you stop pressing the pedal after releasing the key while pressing the pedal, the damper hits the string itself, which is a vibrating body, to attenuate the vibration. Therefore, not only the volume is attenuated, but the waveform of the musical sound itself is deformed, resulting in a subtle timbre change.
[0006]
When the pedal is depressed or depressed, and the pedal is depressed after that key, the musical sound at that time is a string that is in a harmonious relationship with the string that was struck (for example, C with a different octave relative to the C string). A string, a G or E string, etc.) is excited and a resonance sound or the like is added. That is, the tone is slightly different from when the key is depressed without stepping on the pedal.
[0007]
Therefore, it has been considered that an electronic musical instrument can more faithfully simulate the acoustic sound of an acoustic piano by adding various musical sound components as described above to a normal stringed sound. In this specification, the normal stringing sound is the “normal key-pressing sound”, the sound when the damper attenuates the vibration of the string by releasing the key is the “key-off sound”, and the pedal is pressed when the string is freely vibrating. The sound when the damper stops stepping and the damper attenuates the vibration of the string is called “damper-off sound”, and the additional sound such as resonance when the damper is released from the string when the pedal is stepped on is called “damper-on added sound”.
[0008]
By the way, the electronic musical instrument can generate musical sounds in a plurality of channels by time division multiplexing processing of the sound source, but the number of channels of the sound source has increased in recent years. As a result, it has become possible to some extent not only to assign one channel to one key pressing event, but also to add various musical sounds as described above using another channel.
[0009]
[Problems to be solved by the invention]
When such musical tone control is performed, considering the acoustic piano's sounding mode and sounding mechanism, there are four types of sounds: normal key-pressing sound, key-off sound, damper-off sound, and damper-on additional sound, depending on the key operation and pedal operation. Ideally, the tone is controlled for each key. However, simply adding such musical sounds may result in an enormous number of pronunciations and a lack of sound source channels.
An object of the present invention is to facilitate sound generation control of a sound source while simulating a key-off sound, a damper-off sound, and a damper-on additional sound.
[0010]
[Means for Solving the Problems]
In the musical tone control apparatus according to the first aspect of the present invention, when it is necessary to generate a key-off sound, if there is not enough room in the sound source, the release of the normal key-pressing sound to which the key-off sound should be added is lengthened. The key-off sound is used instead.
[0011]
According to a second aspect of the present invention, when the pedal is turned on after the key-off sound is generated, the decay of both the normal key-pressing sound to which the key-off sound is added and the musical sound of the key-off sound is extended. In this case, it is used as a substitute for a damper-on additional sound.
[0012]
According to a third aspect of the present invention, when the pedal is turned on after the key-off sound is generated, the normal key-pressing sound to which the key-off sound is added, or the Any one of the key-off sounds is extended in accordance with the time from the key-off and used as a damper-on additional sound.
[0013]
Note that “there are no free channels” includes a state where the number of free channels is small and a state where there are no free channels.
[0014]
According to the musical tone control apparatus of the first aspect of the present invention, since the key-off sound can be replaced with the release portion of the normal key-pressing sound to which the key-off sound is to be added, the key-off sound is simulated even if the sound source has no free channel. can do. Therefore, it is not necessary to secure a channel for the key-off sound.
[0015]
According to the musical tone control apparatus of the second aspect of the present invention, since the damper-on additional sound can be replaced by the decay portion of both the normal musical sound and the key-off sound to which the key-off sound is added, the reality is improved and the damper is improved. Since there is no need to use a channel for sounding the additional sound, an empty channel for the sound source can be secured.
[0016]
According to the musical tone control apparatus of the third aspect of the present invention, the damper-on additional sound can be replaced by the decay portion of either the normal musical sound or the key-off sound to which the key-off sound is added. A channel for sounding is not used, and any sounding channel of normal music or key-off sound becomes an empty channel, so that an empty channel for the sound source can be further secured.
[0017]
Note that the damper-off sound and the key-off sound have the same mechanism in that they are caused by the contact between the string and the damper when viewed from a specific string that is struck by the key depression, so the damper-off sound is substituted with the key-off sound. be able to. Conversely, the damper-off sound can be substituted for the key-off sound. In this case, since it is not necessary to store the waveform of the damper-off sound or the key-off sound, the memory capacity can be reduced, and the musical sound waveform sampling operation can be reduced.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a block diagram of an electronic musical instrument to which the musical tone control apparatus of the embodiment of the present invention is applied. The CPU 1 controls the entire electronic musical instrument using the working area of the RAM 3 based on a control program stored in the ROM 2. Do. The CPU 1 has a timer inside.
[0019]
The performance operation unit 4 is, for example, an 88-key keyboard, a damper pedal, and the like, and the key code of the key, the key-on signal / key-off signal, the key-pressing speed, etc. depending on the key depression (key-on) and key-release (key-off) events on the keyboard. Touch information can be obtained. Also, pedal information corresponding to the pedal-on signal / pedal-off signal and the pedal depression amount is obtained by each event of the pedal depression operation (pedal on) and the release operation (pedal off) in the damper pedal. The operation panel unit 5 is a display and various setting operators, and displays various modes and selects a tone color.
[0020]
The tone generator 6 is a waveform readout type tone generator, and reads out the waveform data of various musical sounds, which will be described later, stored in the musical sound data memory 8 based on various data transferred by the CPU 1 via the bus line 7 to obtain digital musical sounds. Generate a signal. The sound source unit 6 is configured to be able to produce a plurality of sounds substantially simultaneously in a plurality of channels (for example, two sets of 64 channels) by time division multiplexing processing, and the tone signal generated in each tone generation channel is synthesized. (Added) and output to the D / A converter (DAC) 9. The digital musical tone signal is converted into an analog signal by the D / A converter 9 and amplified by the sound system 10 to generate a musical tone.
[0021]
The memory device 11 is a floppy disk device (FDD), a hard disk device (HDD), a CD-ROM device, a magneto-optical disk (MO) device, a digital multipurpose disk (DVD) device, and the like. It is used for supplying various control programs and storing various data. The network interface 12 is a modem or other interface, and exchanges information with various networks using MIDI, RS-232C, or the like. As a result, it is also possible to receive distribution of musical sound data (waveform data, etc.) from other MIDI devices, server computers, and the like.
[0022]
FIG. 4 is a conceptual diagram illustrating the flow of music generation in the embodiment. The musical sound data memory 8 stores waveform data of “normal key-pressing sound”, waveform data of “damper-on additional sound”, waveform data of “damper-off sound”, and waveform data of “key-off sound”. Each waveform data is stored for two stereo channels for each key of the keyboard. Further, each waveform data is stored in correspondence with each of a plurality of timbres such as an acoustic piano and an electric piano.
[0023]
The control unit corresponds to the keyboard and damper pedal of the performance operation unit 4 and the CPU 1, and mainly performs performance information generation and channel assignment of the sound source unit 6. The performance information is key-on, key-off, key-code (kc), touch information (touch), volume information (volume), pedal-on (pedalon), pedal-off (pedaloff), tone color information (tonecolor), etc. Based on the performance information, waveform data in the musical tone data memory 8 is selected, and a sound generation channel is assigned to each waveform data from among the plurality of channels TGCHn of the tone generator section 6.
[0024]
Sound generation channel TGCH (normal) for normal key press sound, sound generation channel TGCH (dmpon) for damper-on addition sound, sound generation channel TGCH (dmpoff) for damper-off sound, sound for key-off sound Each of the channels TGCH (koff) is assigned. The musical tone signals generated in the sound generation channels are synthesized by the mixer.
[0025]
The above process is a basic process performed when there is room in the channel of the sound source unit 6. As will be described later, for the key-off sound, the release of the envelope of the musical sound is controlled when there is no empty channel. To substitute for key-off sound. In addition, the damper-on added sound is controlled by controlling the decay of the key-off sound and the normal key-pressing sound to change the tone color according to the damper-on. Furthermore, at that time, if the number of sounding channels (sound generation channels) is large, only the decay of the envelope of the normal key pressing sound is controlled.
[0026]
FIG. 2 is a diagram illustrating an example of an envelope of a tone signal corresponding to a key operation and a pedal operation in the embodiment. Normally, the key-pressing sound shows the characteristic of the two-stage attenuation of the piano. An attack that starts immediately after the key is pressed (key-on), a pre-decay that decays at a fast speed from the maximum amplitude, and a decay that decays at a slow speed following this pre-decay. , And a release that is forcibly attenuated from the middle of the decay by key release (key-off). If the keys are not released, they are naturally attenuated by decay as shown by broken lines.
[0027]
The damper-on added sound is an attack that rises relatively loosely when the damper pedal is depressed (pedal-on), a decay that decays from its maximum amplitude at a slow speed, and a release that is forcibly attenuated when the damper pedal is released (pedal-off) It consists of If the pedal is not turned off, it is naturally attenuated by decay as shown by the broken line. The damper-off sound is composed of an attack that rises when the pedal is turned off, and a decay that attenuates at a relatively high speed from its maximum amplitude. Furthermore, the key-off sound is composed of an attack that rises immediately after the key-off, and a decay that attenuates at a relatively high speed from its maximum amplitude.
[0028]
In the example of FIG. 2, the damper pedal is depressed (pedal on) simultaneously with key depression (key on), the damper pedal is released (pedal off) in the key depression state, and then the key is released (key off). . Therefore, a normal key-pressing sound and a damper-on additional sound are generated at the same time. When the pedal is turned off, the damper-on additional sound is released and the damper-off sound rises. ing.
[0029]
Here, when there is no empty channel in the sound source unit 6 at the time of key-off (or when the number of empty channels is small), the key-off sound is not generated by the key-off as shown in FIG. Without allocating a channel, the release of the normal key press sound is made longer than in the conventional case as shown by the broken line, and this release portion is used as a substitute for the key-off sound.
[0030]
In addition, as shown in FIG. 1B, normally, a normal key-pressing sound is released and a key-off sound rises due to the key-off, and when the pedal is turned on while the key-off sound is generated, the normal key-pressing sound and the key-off sound are generated. This is a substitute for the damper-on additional sound. Further, if the sound source unit 6 has no room for an empty channel at this time, either the normal key pressing sound or the key-off sound is extended according to the time from the key-off to replace the damper-on additional sound. Note that when the key is released as normal or the decay is performed as usual, the tone generation channel is released when the tone level becomes 0 level or almost 0 level.
[0031]
Next, the operation of the embodiment will be described based on the flowcharts of FIGS. In the following description and each flowchart, each register and the like is represented by the following label, and the register and the stored contents are represented by the same label unless otherwise specified.
[0032]
KCx: Key code with key event (key on / key off)
DMPPEDAL: Damper pedal depression
#PDLON: Setting value (threshold value) of the amount of depression of the damper pedal that serves as a criterion for judging damper on
VCH: Channel number of an empty channel
NRMLT [KCx, TOUCHx,. . ]: Data group corresponding to waveform data of normal key-press sound of key code KCx and touch data TOUCHx (data group transferred to sound source unit 6)
DMPT [KCx, TOUCHx,. . ]: Data group corresponding to the waveform data of the damper-on additional sound of the key code KCx and touch data TOUCHx (data group to be transferred to the sound source unit 6)
KONTIMER [KCx]: Key-press timer that measures key-press time from key-on of key code KCx
KONTIM (KCx): Key code KCx key press time (elapsed time from key-on)
NRMLLEVEL (KCx): Volume level of normal key-press sound of key code KCx
#LVL: A set volume level that is a criterion for the substantial end of pronunciation
#ONTIME: A set time that is a criterion for the substantial end of pronunciation based on the key press time
KOFFT [KCx, KONTIM (KCX), LVL (KCx)]: Data group corresponding to key-off sound waveform data of key code KCx, key pressing time KONTIM (KCX), volume level LVL (KCx) (transfer to sound source unit 6) Data group)
[0033]
#CHLMT: Upper limit setting value for the number of sound generation channels that is a criterion for determining the key-off sound limit
RLSRATE [KCx]: Release rate that determines the length of normal key-press release
KOFFTDECAY [KCx]: Decay rate that determines the decay length of the key-off sound of the key code KCx
NRMLTDECAY [KCx]: Decay rate that determines the decay length of the normal keypress sound of the key code KCx
#RRCOEF: Release rate extension factor for changing the release rate of normal key-pressing sound (however, #RRCOEF> 1)
# DECAYCOEF2: Decay rate extension factor for changing the decay rate of the key-off sound
# DECAYCOEF1: Decay rate extension coefficient for changing the decay rate of the normal key-press sound (where # DECAYCOEF2># DECAYCOEF1)
#TIM: Step update amount of the key press timer
[0034]
In the following description and flowchart, the suffix “x” indicates all current processing objects such as all key codes having key events, and this suffix “x” is added in each step processing. This indicates that the same processing is performed for all processing targets.
[0035]
The sound generation process of FIG. 5 is a subroutine started from a main routine that performs processing of a normal electronic musical instrument, and performs a process of detecting performance events in the keyboard and damper pedal of the performance operation unit 4 in step S1. Next, it is determined whether or not there is a key pressing event in step S2, and if there is no key pressing event, it is determined whether or not there is a key release event in step S3. Further, if there is no key release event, it is determined in step S4 whether or not there is a damper pedal on event, that is, whether or not the depression amount DMPPEDAL is greater than or equal to the set value #PDLON, and if there is no damper pedal on event. In step S5, it is determined whether or not there is a damper pedal off event, that is, whether or not the depression amount DMPPEDAL is less than the set value #PDLON. If it is not a damper pedal off event, the process proceeds to step S6 in FIG.
[0036]
In step S6, whether or not the event is a detection event of the actual sounding end state of the normal key-pressing sound, that is, “the normal key-pressing sound volume level NRMLLEVEL (KCx) is equal to or lower than the set volume level #LVL and the key pressing time It is determined whether or not the condition that “KONTIM (KCx) exceeds the set time #ONTIME” is satisfied, and if it is not the substantial sound end state (if NO), the process returns to the main routine. If it is in a substantial sounding end state (if YES), in step S7, the normal key-pressing sound NRMLT [KCx] of the corresponding key code (pitch) KCx is keyed off, the sounding channel is released, and the key-pressing is performed. The timer KONTIMER [KCx] is turned off to return to the main routine.
[0037]
In steps S6 and S7 described above, it is determined whether or not the normal key-pressing sound is substantially generated based on the key-pressing time. However, the level of the tone signal is 0 (or almost 0) due to the release or decay of the normal key-pressing sound and the key-off sound. ), The corresponding channel of the sound source unit 6 is automatically released by the processing of the other steps of the main routine.
[0038]
If there is a key depression event in step S2 of FIG. 5, the key code having the key depression event is stored in the register KCx, and it is determined in step S8 whether or not the damper pedal depression amount DMPPEDAL is equal to or larger than the set value #PDLON. If the determination result is “NO”, the pedal is in an off state, and in step S9, NRMLT [KCx, TOUCHx,. . ] Is transferred to the channel VCH of the sound source unit 6 to perform a normal key-press sound generation process, and the process proceeds to step S12. On the other hand, if the determination result in step S8 is “YES”, the pedal is on, so in step S10, NRMLT [KCx, TOUCHx,. . ] To the channel VCH of the sound source unit 6 to perform normal key-press sound generation processing, and in step S11, DMPT [KCx, TOUCHx,. . ] Is transferred to the channel VCH of the sound source unit 6 to perform a sound generation process of the damper-on additional sound, and the process proceeds to step S12. In step S12, the key pressing timer KONTIMER [KCx] is reset to “0”, and the key pressing timer is activated to return to the main routine.
[0039]
If there is a key release event in step S3, the key code in which the key depression event occurred is stored in the register KCx. In step S13, it is determined whether or not the damper pedal depression amount DMPPEDAL is less than the set value #PDLON. If the determination result is “NO”, the pedal is in the on state, and the key release in the pedal on state does not affect the musical tone, so the process returns to the main routine as it is. If the determination result is “YES”, the pedal is in an off state, and therefore, processing corresponding to the key release for the normal key pressing sound, key off sound, and damper on additional sound is performed in step S14 and subsequent steps. That is, in step S14, it is determined whether or not the normal key pressing sound NRMLT [KCx] is continuing the key-on. If the key-on is not continued, the process proceeds to step S16. If the key-on is continued, the process proceeds to step S15 in FIG. Normal key-pressing sound / key-off sound processing is performed, and the process proceeds to step S16. In step S16, if there is a damper-on additional sound DMPT [KCx], a key-off process for the damper-on additional sound DMPT [KCx] is performed and the process returns to the main routine.
[0040]
If there is a damper pedal on event in step S4, the damper on process of FIG. 9 is performed in step S17 to return to the main routine. If there is a damper pedal off event in step S5, the damper off process of FIG. 10 is performed in step S18 to return to the main routine.
[0041]
FIG. 7 is a flowchart of the key press timer interrupt process for measuring the key press time, which is started with a predetermined interrupt clock. First, in step S21, it is determined whether or not the key pressing timer KONTIMER [KCx] is active. If there is no active timer, the process returns to the original routine. If there is an active timer, the key code KCx is returned in step S22. initialize. This key code initialization is a process of picking up each key code KCx corresponding to all the key-pressing timers KONTIMER [KCx] being activated, and ordering so that the key codes can be sequentially specified in the following processing. It is.
[0042]
In step S23, it is determined whether or not the time value KONTIMER [KCx] of the key pressing timer corresponding to the key code KCx is equal to or shorter than the set time #ONTIME. If so, in step S24, the key pressing timer is updated by the step update amount #TIM, and the process proceeds to step S25. In step S25, it is determined whether or not the processing for all the key-pressing timers being activated has been completed. If completed, the process returns to the original routine. If not completed, the key code is updated in step S26, and the process proceeds to step S26. Return to S23. As a result of the above processing, the key pressing timer that has exceeded the set time #ONTIME by the key pressing timer that is being activated retains that value, and it is determined whether or not the actual sound generation has ended in the normal key pressing sound / key-off sound processing of step S6 and FIG. Used for.
[0043]
The normal key-pressing sound / key-off sound processing in FIG. 8 is processing when there is a key release event. In step S31, whether or not the normal key-pressing sound is being continued, that is, “normal key-pressing sound volume” It is determined whether or not the condition that the level NRMLLEVEL (KCx) is greater than the set sound volume level #LVL or the key pressing time KONTIM (KCx) is less than or equal to the set time #ONTIME is satisfied. If the determination result is “NO”, the sound is not being continued and the normal key-pressing sound corresponding to the key code KCx that has been released is substantially in the sounding end state, so that the process returns to the original routine as it is, and “YES”. In step S32, an empty channel of the sound source unit 6 is searched, and it is determined whether or not there is an empty channel in step S33. If there is an empty channel, in step S34, KOFFT [KCx, KONTIM (KCX), LVL (KCx)] is transferred to the empty channel VCH of the sound source unit 6 to perform an assigned sounding process for the key-off sound, and in step S36. A key-off process for the normal key-pressing sound NRMLT [KCx] is performed, and the process returns to the original routine.
[0044]
On the other hand, if there is no empty channel, in step S35, the release rate RLSRATE [KCx] of the normal key press sound NRMLT [KCx] corresponding to the released key code KCx is multiplied by the release rate extension coefficient #RRCOEF. The result is updated as the release rate RLSRATE [KCx]. In step S36, the key-off process for the normal key press sound NRMLT [KCx] is performed, and the process returns to the original routine.
[0045]
Through the above processing, a key-off sound is added when there is an empty channel due to a key release event, and the normal key-press sound is muted (released) based on the normal release rate. On the other hand, if there is no empty channel, the key-off sound is not added, and the normal key-pressing sound is muted with a longer release based on the updated release rate RLSRATE [KCx]. Will replace the key-off sound. Each channel is released when the normal key-pressing sound and key-off sound are muted.
[0046]
The damper on process of FIG. 9 is a process in the case where there is a damper pedal on event. In step S41, the sound generation process of the unsounded damper on added sound corresponding to each key code of the normal key press sound that is being generated is performed. I do. Here, the volume, envelope, etc. of this damper-on additional sound are controlled by the volume level NRMLLEVEL of the normal key pressing sound and the key pressing time KONTIM. That is, when the volume of the normal key-pressing sound is high, the volume of the damper-on additional sound is also increased, and when the volume is low, the volume is reduced. The same processing can be performed with a key pressing time indicating a time from the key pressing.
[0047]
Next, in step S42, it is determined whether or not there is a key-off sound that is being sounded. If there is no sound, the process returns to the original routine. If there is, the sound source channel (sounding channel) of the sound source unit 6 is determined in step S43. It is determined whether or not the number is less than or equal to the upper limit set value #CHLMT. If it is less than or equal to the upper limit set value, there is a margin in the number of channels, and in step S44, the decay of the key-off sound being sounded is extended. That is, the key-off sound decay KOFFTDECAY [KCx] is multiplied by the key-off sound decay extension coefficient # DECAYCOEF2, and the multiplication result is transmitted as a decay KOFFTDECAY [KCx] to the sounding channel corresponding to the key-off sound. Further, in step S45, the decay of the normal key-pressing sound that is sounding corresponding to the key-off sound being sounded is extended. In other words, the normal key-pressing sound decay NOMLDECAY [KCx] is multiplied by the normal key-pressing sound decay extension coefficient # DECAYCOEF1, and the multiplication result is transferred to the corresponding sounding channel of the normal key-pressing sound as decay NOMLTDECAY [KCx]. To do.
[0048]
On the other hand, if the number of sound generation channels of the sound source unit 6 exceeds the upper limit setting value in step S43, the process of step S44 is not performed, and the normal key-press sound during sound generation corresponding to the key-off sound during sound generation in step S45 is not performed. Extend only decay. Then, in step S46, it is determined whether the process has been completed for all key-off sounds that are being sounded. If not, the process returns to step S43, and if completed, the process returns to the original routine.
[0049]
With the above processing, if there is room in the channel of the sound source unit 6, the decay of both the key-off sound and the normal key-pressing sound corresponding to this key-off sound is extended, and the damper-on additional sound is substituted. Thus, since the damper-on additional sound is substituted by both the key-off sound and the normal key-press sound, the reality is improved. On the other hand, if there is no room in the channel of the sound source unit 6, the decay of only the normal key pressing sound corresponding to the key-off sound is extended, and the damper-on additional sound is substituted. As a result, the key-off sound is quickly muted and the sound generation channel is released, so that an empty channel can be secured early.
[0050]
The damper-off process of FIG. 10 is a process in the case where there is a damper pedal off event. In step S51, the key code released by the normal key-pressing sound that is sounding and the damper-on additional sound that is sounding. A key-off process is performed on the sound corresponding to the sound, and a damper-off sound corresponding to the key code is generated. In step S52, with respect to the normal key-pressing sound and the key-off sound that are being sounded, the original decay rate of each sound is transferred to the sounding channel, and the process returns to the original routine. Thereby, a damper-off sound is added.
[0051]
The damper-off sound may be substituted with waveform data of the key-off sound, and the key-off sound may be substituted with waveform data of the damper-off sound. This can reduce the memory capacity and save the waveform sampling.
[0052]
Further, the set time #ONTIME, which is a criterion for the substantial end of sound generation, may be set for each key code or key range. For example, in the case of a piano, it is better to make it smaller as the pitch is higher (shorten the set time).
[0053]
In the embodiment, when the pedal is turned on after the key-off sound is generated, if there is not enough room in the sound source channel, the decay of the normal key-pressing sound is extended without changing the key-off sound decay. You may make it extend the decay of a key-off sound, leaving the decay of a key sound as it is.
[0054]
Although the sound source unit 6 is provided in the embodiment, the CPU 1 may also serve as a sound source function, that is, a process of generating a musical sound waveform, and the sound source unit 6 may be omitted. In this case, the D / A converter (DAC) 9 receives the digital musical tone signal via the bus line 7.
[0055]
In the embodiment, the present invention is applied to an electronic musical instrument. However, the present invention is not limited to an electronic musical instrument, and may be a personal computer + application software. The present invention is applied to a karaoke device, a game device, and an automatic performance piano. Also good. In addition, the sound source device and the controller are not limited to those built in one electronic musical instrument main body, but each is a separate device, and each device is connected using communication means such as MIDI or various networks. Also good.
[0056]
【The invention's effect】
According to the musical tone control apparatus of the first aspect of the present invention, since the key-off sound can be replaced with the release portion of the normal key-pressing sound to which the key-off sound is to be added, the key-off sound is simulated even if the sound source has no free channel. can do. Therefore, it is not necessary to secure a channel for the key-off sound. Therefore, sound generation control of the sound source can be facilitated while simulating key-off sound, damper-off sound, and damper-on additional sound.
[0057]
According to the musical tone control apparatus of the second aspect of the present invention, since the damper-on additional sound can be replaced by the decay portion of both the normal musical sound and the key-off sound to which the key-off sound is added, the reality is improved and the damper is improved. Since there is no need to use a channel for sounding the additional sound, an empty channel for the sound source can be secured. Therefore, sound generation control of the sound source can be facilitated while simulating key-off sound, damper-off sound, and damper-on additional sound.
[0058]
According to the musical tone control apparatus of the third aspect of the present invention, the damper-on additional sound can be replaced by the decay portion of either the normal musical sound or the key-off sound to which the key-off sound is added. A channel for sounding is not used, and any sounding channel of normal music or key-off sound becomes an empty channel, so that an empty channel for the sound source can be further secured. Therefore, sound generation control of the sound source can be facilitated while simulating key-off sound, damper-off sound, and damper-on additional sound.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an example of a key-off sound substitution process and a damper-on addition sound substitution process according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of an envelope of a musical sound signal corresponding to a key operation and a pedal operation in the embodiment of the present invention.
FIG. 3 is a block diagram of an electronic musical instrument to which a musical tone control apparatus according to an embodiment of the present invention is applied.
FIG. 4 is a conceptual diagram illustrating a flow of music generation in the embodiment of the present invention.
FIG. 5 is a part of a flowchart of a sound generation process in the embodiment of the present invention.
FIG. 6 is another part of the flowchart of the sound generation process.
FIG. 7 is a flowchart of a key press timer interrupt process according to the embodiment of the present invention.
FIG. 8 is a flowchart of normal key-pressing sound / key-off sound processing in the embodiment of the present invention.
FIG. 9 is a flowchart of a damper-on process in the embodiment of the present invention.
FIG. 10 is a flowchart of a damper-off process in the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... Performance operation part, 6 ... Sound source part, 8 ... Musical sound data memory

Claims (3)

When it is necessary to generate a key-off sound, if there is not enough available channel in the sound source, the release of the normal key-press sound to which the key-off sound should be added is lengthened and used as a substitute for the key-off sound. Musical sound control device. When the pedal is turned on after the key-off sound is generated, the decay of both the normal key-pressing sound to which the key-off sound is added and the musical sound of the key-off sound is extended to replace the damper-on additional sound. A musical sound control device. When the pedal is turned on after the key-off sound is generated and there is not enough room in the vacant channel of the sound source, the decay of either the normal key-off sound to which the key-off sound is added or the key-off sound is A musical sound control device characterized in that it is extended according to time and used as a damper on additional sound.

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