JP3931848B2 - Waveform selection device and waveform selection program - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a waveform selection device and a waveform selection program in a musical sound generating device that reads out waveform data selected from a storage means and generates a sound.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a musical sound generating device having a waveform storage means, when a key is depressed, the waveform data for sound generation is read out from the waveform storage means according to the sound generation instruction and is generated. In this case, a plurality of waveform data for sound generation are stored in the waveform storage means, and a sound corresponding to a combination of a key pressing speed (sound generation instruction speed) and a key code at the time of key pressing is selected from these. Like to do. Further, when a key is released, the key release (silence) waveform data is read out from the waveform storage means according to the mute instruction and is generated. In this case, a plurality of waveform data for key release are stored in the waveform storage means, and the one corresponding to the combination of the envelope value, key release speed (mute instruction speed) and key code at the time of key release is stored. Select and pronounce it. In this way, new key press waveform data is generated for each key press, and new key release waveform data is generated for each key release (see, for example, Patent Document 1).
Then, in order to make the musical sound generated by such a musical sound generating device closer to the musical sound of a natural musical instrument, when the key is released, the sound generation waveform is muted by the muting instruction, and the waveform data for muting is also used. Is read out from the waveform storage means and additionally pronounced.
[0003]
[Patent Document 1]
JP-A-5-19755 [0004]
[Problems to be solved by the invention]
In such a conventional tone generator, the keyboard is provided with a mechanism for detecting the speed when the player performs a key operation and a mechanism for detecting the speed when the key is released. Using these mechanisms, the detection circuit outputs a key pressing speed indicating the key pressing speed and a key releasing speed indicating the key releasing speed, respectively. In this case, the key pressing speed and the key releasing speed are the values of the key velocity. However, it is easy for the performer to be aware that the key-pressing speed is controlled, but the key-release speed is not perceived by the player, and the key-release waveform data selected based on the key-release speed is There was a problem that there was a case where it was not suitable for the purpose.
Each event of key depression and key release is detected by turning on / off a switch provided on the key, and the switch is generally a rubber switch in order to absorb an impact caused by the key. Then, since the rubber switch has elasticity, when the rubber switch is released and the rubber switch is released, the contact point of the rubber switch is not instantaneously released, and it is difficult to accurately detect the key release velocity. As described above, the key release speed has a problem that the accuracy of detection is lower than the key press speed, and waveform data for key release cannot be selected accurately.
[0005]
Furthermore, providing a device for detecting the key release speed is costly, and in order to accurately detect the key release velocity, the rubber switch structure must be devised, and the key structure becomes complicated. Costs will also rise. Furthermore, outputting the key release speed is not generally performed, and when outputting the key release speed, a program for outputting the key release speed is added. Since the program for outputting the added key release speed is stored in the built-in memory, there is a problem that the memory to which the program for outputting the key release speed is added must be recreated.
[0006]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a waveform selection device and a waveform selection program that can select accurate waveform data that matches a player's intention and that are inexpensive.
[0007]
[Means for Solving the Problems]
The waveform selection device and the waveform selection program of the present invention capable of achieving the above object select and select the mute waveform data corresponding to the sound generation instruction speed at the time of sound generation instruction in the sound generation waveform data instructed to mute. Since the mute waveform data is read from the storage means and the additional sound generation is started, it is possible to select the appropriate mute waveform data that matches the intention of the performer and perform additional sound generation. Further, it is possible to eliminate the need for a mechanism for detecting the speed at the time of key release, and it is not necessary to add a program for outputting the key release speed to the built-in memory.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram showing a configuration of a musical sound generator provided with a waveform selection device according to an embodiment of the present invention.
In the musical sound generating apparatus 1 according to the present invention shown in FIG. 1, the waveform selecting apparatus according to the embodiment of the present invention is provided as the waveform selecting unit 2. In such a musical tone generator 1, a CPU (Central Processing Unit) 10 controls the overall operation of the musical tone generator 1 and executes a musical tone generation program to execute a sound generation instruction process, a mute instruction process, and the like. Yes. A RAM (Random Access Memory) 12 is set with a work area for the CPU 10 and a storage area for various data. A ROM (Read Only Memory) 11 includes a sound generation instruction process and a mute instruction process executed by the CPU 10. Operation software such as a musical tone generation program is stored. By making this ROM 11 a rewritable ROM such as a flash memory, the operation software can be rewritten and the operation software can be easily upgraded. The display circuit 13 includes a display means such as a liquid crystal, and displays various setting screens on the display means and an operation screen at the time of tone generation on the display means.
[0009]
The communication interface (I / F) 14 is an interface for connecting the musical sound generator 1 to a communication network such as a LAN (local area network), the Internet, a telephone line, etc., and is connected to a server computer via the communication network. Can do. Therefore, various programs and data can be downloaded from the server computer. At this time, the musical tone generator 1 of the present invention as a client transmits a command for requesting downloading of a program or data to the server computer via the communication interface and the communication network. Upon receiving this command, the server computer distributes the requested program and data to the musical tone generator 1 of the present invention via the communication network. The musical tone generating apparatus of the present invention can download a program or data by receiving the program or data distributed from the server computer via the communication interface and storing it in the storage means such as the RAM 12. become.
[0010]
The operation element 16 is a panel operation element provided on the keyboard or the panel. The keyboard is provided with a mechanism for detecting the speed when the player performs the key operation, but detects the speed when the key is released. No mechanism is provided. The detection circuit 15 detects a key pressing (key-on) event by scanning a keyboard or panel operator, and a key pressing speed IT (initial touch) indicating the key code KC of the key where the event occurred and the key pressing speed. When a key release (key-off) event is detected, the key code KC of the key having the event is output. The waveform selection unit 2 is a combination of a waveform data memory 17 storing a plurality of sounding waveform data 17a and a plurality of mute waveform data 17b, and a combination of a key pressing speed (sound generation instruction speed) and a key code when a key is pressed. Select the corresponding waveform waveform for sound generation, and the envelope value at the time of release of the musical sound by the waveform data for sound generation that is started in response to the key pressed when the key is released and the key press when the key is pressed A selection circuit 19 for selecting the mute waveform data corresponding to the combination of the key speed (sound generation instruction speed) and the key code, and the waveform data for mute or the mute waveform data selected by the selection circuit 19 are read from the waveform data memory 17. A reading circuit 18; and an envelope applying circuit 20 for adding an envelope to the sounding waveform data or the mute waveform data read by the reading circuit 18; It is al configuration. The output of the waveform data to which the envelope is added from the waveform selection unit 2 is supplied to an effect applying circuit 21 for applying various acoustic effects such as reverb, chorus, delay, pan, etc., and various set acoustic effects are applied. Thus, a musical tone signal is generated. This musical sound signal is emitted from the sound system 22. Each unit of the musical tone generator 1 exchanges data with each other via the communication bus 23.
[0011]
The sound generation waveform data 17a stored in the waveform data memory 17 in the waveform selection unit 2 is waveform data of the attack part and the loop part, and corresponds to a combination of the key code KC and the key pressing speed IT. A set of waveform data of a plurality of attack portions and waveform data of a plurality of loop portions arranged two-dimensionally is used. Further, the muffling waveform data 17b includes a set of a plurality of muffling waveform data arranged two-dimensionally so as to correspond to the combination of the key code KC and the key pressing speed IT at the time of key pressing for each divided envelope value. Has been. A set of a plurality of sets of waveform data for sound generation and a set of sets of waveform data for muting are set as a plurality of sets corresponding to a plurality of timbres as waveform data for one timbre. Is remembered. The waveform data of the attack portion is waveform data to which an envelope is added, and the mute waveform data 17b is waveform data of attenuated sound to which an attenuation envelope is added.
[0012]
The operation of the waveform selection unit 2 will be described. When the detection circuit 15 detects that any key of the keyboard as the operation element 16 has been pressed, the sound generation channel is assigned and the selection circuit 19 is assigned. Selects the waveform data for sound generation corresponding to the key code KC of the pressed key from the detection circuit 15 and the key press speed IT from the waveform data 17a for sound generation in the waveform data memory 17. The tone generation waveform data selected by the selection circuit 19 is read from the waveform data memory 17 by the reading circuit 18 and supplied to the envelope applying circuit 20. In the envelope applying circuit 20, an envelope corresponding to the key pressing speed IT and the set tone color is applied and supplied to the effect applying circuit 21. In the effect applying circuit 21, various sound effects such as reverb, chorus, delay, pan, and the like set by the panel operator which is the operator 16 are provided and the tone signal of the tone generation channel assigned is obtained. This musical sound signal is emitted from the sound system 22.
[0013]
The waveform selection unit 2 is provided with a plurality of channels for generating musical sounds, and one musical sound (waveform data) is generated (reproduced) by one channel. In this case, when a key depression is detected, one channel is secured as a sound generation channel, and the waveform data for sound generation is read out in the reserved sound generation channel to generate a tone signal for sound generation. When a key release is detected, one channel is secured as a mute channel, and the mute waveform data is read out in the secured mute channel to generate a mute tone signal. The mute channel is a channel different from the sound generation channel secured when the released key is pressed, and the waveform data for sound generation by pressing one key and the waveform data for mute by releasing the key are read simultaneously. Will be pronounced at the same time.
[0014]
When the detection circuit 15 detects that any of the keys of the keyboard as the operation element 16 has been released as a mute instruction, the mute processing of the sound that is being generated corresponding to the released key is performed. Be started. In other words, the tone applying amplitude is attenuated by applying a release falling envelope in the envelope applying circuit 20 to the sound waveform data supplied from the readout circuit 18. Further, the mute channel is assigned, and the selection circuit 19 corresponds to the envelope value at the time of key release, the key code KC of the key released from the detection circuit 15, and the key press speed IT detected at the time of key press. The mute waveform data is selected from the mute waveform data 17b in the waveform data memory 17. The mute waveform data selected by the selection circuit 19 is read from the waveform data memory 17 by the reading circuit 18 and supplied to the effect applying circuit 21 via the envelope applying circuit 20. Since the mute waveform data is waveform data to which a release envelope is added, the envelope applying circuit 20 is given a constant value envelope. In the effect applying circuit 21, various sound effects set by the panel operation element that is the operation element 16 are applied to generate a musical sound signal in the mute channel. As a result, when the key is released, the sound-saving music signal based on the sound-saving waveform data is additionally generated by the mute channel assigned when the key is released. The added mute tone signal is emitted from the sound system 22 but is attenuated, so that the amplitude gradually decreases.
[0015]
By the way, when a musical tone other than the musical tone corresponding to the key released at the time of the key release is sounded, it is determined that the legato performance is performed, and the reading circuit 18 reads the mute waveform data. Therefore, additional sound generation of the mute tone signal is not performed. As a result, since no extra pronunciation is added to the connected portion of the sound during the legato performance, the connection of the two sounds can be made natural. Further, since the mute tone signal is not additionally generated, the sound generation channel is not used unnecessarily and the increase in the sound generation processing amount can be suppressed as much as possible. In addition, not only when playing legato, but when other musical sounds are being produced, the musical sound for mute will not be additionally pronounced, but the amplitude of the musical sound for mute is small and the sound is attenuated. In this case, the sound signal instructed to be muted is not unnaturally heard without further sounding the muting sound signal.
[0016]
Next, FIG. 2 shows a flowchart of the sound generation instruction process executed in the musical tone generator 1 provided with the waveform selection unit 2 according to the present invention.
The sound generation instruction process is started each time a sound generation instruction which is a new key pressing event is detected in the detection circuit 15, and the operation speed of the key when the key pressing event is detected and the sound generation instruction is issued in step S10. The key depression speed at the time of key depression is detected and held in the buffer for each key depression, and a sound generation channel for generating a tone signal for sound generation is secured. The key pressing speed is specifically a velocity value at the time of key pressing, and this velocity value is held in a buffer for each key pressing. Next, the waveform data for sound generation corresponding to the detected key pressing speed and the key code of the key pressed from the sound waveform data 17a in the tone color set for the musical tone instructed for sound generation in step S11. It is determined by the selection circuit 19. Then, in step S12, the tone generation of the musical tone using the tone generation waveform data determined in the secured tone generation channel is started. Specifically, the waveform data for sound generation determined in the reserved sound generation channel is started to be read from the waveform data memory 17 by the read circuit 18 and supplied to the envelope applying circuit 20 to give the envelope. The sound waveform data set with the envelope is given the sound effect set in the effect applying circuit 21, and the musical sound signal for sound generation is generated. The tone signal generated in the reserved tone generation channel is generated by the sound system 22 and the tone generation is started. When the process of step S12 ends, the sound generation instruction process ends.
[0017]
Next, FIG. 3 shows a flowchart of the mute instruction process executed in the musical tone generator 1 having the waveform selection unit 2 according to the present invention.
The mute instruction processing is started when a mute instruction, which is a new key release event, is detected by the detection circuit 15, and mute of the musical sound instructed to mute corresponding to the key released in step S20 is started. . Specifically, a process of gradually lowering the volume of the musical sound by adding an envelope for release to the waveform data for sound generation corresponding to the released key by the envelope applying circuit 20. Start. Next, in step S21, it is determined whether or not there is a musical sound that is sounded other than the musical sound instructed to mute. In this case, it is determined that the tone being pressed is not instructed to be released as a tone that is being played, and the tone that has already been released and is being played by the release part is not determined as the tone that is being played. It is preferable to do so. Here, if it is determined that there is another musical sound that is sounded, the mute instruction process is terminated. On the other hand, if it is determined that there is no other tone that is sounded, the process proceeds to step S22 and is based on the operation speed at the time of sound generation instruction held in the sound generation instruction process when the key released is pressed. As a result, the mute waveform data 17b to be used is determined, and a mute channel for generating a mute tone signal is secured. Specifically, the sound-loss waveform data corresponding to the envelope value of the tone at the time of key release, the velocity value at the time of key press being held, which is the operation speed, and the key code of the key released is selected. Determined by circuit 19. Then, the mute waveform data determined in the mute channel secured in step S23 is started to be read from the waveform data memory 17 by the read circuit 18. The mute waveform data is supplied to the effect applying circuit 21 via the envelope applying circuit 20 to generate a sound signal for mute. A sound generation signal for mute generated in the reserved mute channel is sounded from the sound system 22 to start sound generation. When the process of step S23 ends, the mute instruction process ends.
[0018]
Note that the sound generation instruction and the mute instruction for reading the waveform data from the waveform data memory 17 are not limited to the events in the key pressing and key release keys, and any information can be used as long as the waveform data can be read out. In the waveform selection device according to the present invention, for example, key-on and key-off read from the internal memory or received from the outside can be handled as a sound generation instruction and a mute instruction, respectively. In this case, the key pressing speed is a velocity corresponding to key-on, and the key release speed is a velocity corresponding to key-off.
Further, in the waveform selection device according to the present invention, the musical sound based on the mute waveform data is additionally generated only when the sound that has been pronounced to the end is muted, but the present invention is not limited to this. The present invention can also be applied to the case where the mute waveform data is additionally pronounced for all the sounds that are being sounded.
[0019]
【The invention's effect】
As described above, the present invention selects the mute waveform data corresponding to the sound generation instruction speed at the time of sound generation in the sound generation waveform data instructed to mute, and reads the selected mute waveform data from the storage means to perform additional sound generation. Therefore, it is possible to select the appropriate mute waveform data that matches the intentions of the performer and additionally pronounce it. Further, it is possible to eliminate the need for a mechanism for detecting the speed at the time of key release, and it is not necessary to add a program for outputting the key release speed to the built-in memory.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a musical sound generation device including a waveform selection device according to an embodiment of the present invention.
FIG. 2 is a flowchart of a sound generation instruction process executed in a musical sound generating apparatus including a waveform selection unit according to the present invention.
FIG. 3 is a flowchart of a mute instruction process executed in a musical sound generator having a waveform selection unit according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Musical tone generator, 2 Waveform selection part, 10 CPU, 11 ROM, 12 RAM, 13 Display circuit, 14 Communication I / F, 15 Detection circuit, 16 Operator, 17 Waveform data memory, 17a Sound waveform data, 17b Silence Waveform data, 18 readout circuit, 19 selection circuit, 20 envelope application circuit, 21 effect application circuit, 22 sound system, 23 communication bus

Claims (4)

A plurality of sound-wave data, storage means for storing a plurality of sound-absorbing waveform data,
Holding means for holding the operation speed at the time of the sound generation instruction in the buffer when the sound generation instruction is detected;
When the sound generation instruction is detected, the sound generation waveform data corresponding to the operation speed at the time of the sound generation instruction held in the buffer is read from the storage means and the sound generation for starting the sound generation based on the sound generation waveform data is started. Means,
When a mute instruction is detected, a mute means for starting mute of the musical sound instructed to mute,
When the mute instruction is detected, the mute waveform data corresponding to the operation speed at the time of the mute instruction held in the buffer is read from the storage means , and the sound generation for starting the sound generation based on the mute waveform data is started. Control means;
Waveform selection apparatus comprising: a. The pronunciation control means includes
When the mute instruction is detected, the mute waveform data corresponding to the operation speed at the time of sound generation instruction held in the buffer and the envelope value of the musical sound at the time of mute instruction is read from the storage means, and the mute 2. The waveform selection apparatus according to claim 1, wherein the sound generation based on the waveform data is started . A computer having storage means for storing a plurality of waveform data for sound generation and a plurality of waveform data for mute, and a buffer for holding an operation speed at the time of sound generation instruction,
Upon detection of sound generation instruction, the sound waveform data corresponding to the operation speed during sounding instruction held in said buffer is read from the storage means, initiates the sound of the musical tone based on the sound waveform data pronunciation Step,
A mute step for starting mute of the musical sound instructed to mute when a mute instruction is detected ,
When the mute instruction is detected, the mute waveform data corresponding to the operation speed at the time of the mute instruction held in the buffer is read from the storage means , and the sound generation for starting the sound generation based on the mute waveform data is started. Control step,
Waveform selection program to execute . When detecting a mute instruction, the apparatus further comprises a determination means for determining whether there is any other sound that is pronounced in addition to the sound instructed to mute,
The pronunciation control means includes
If the determination means determines that there is no sound generation, the mute waveform data corresponding to the operation speed at the time of sound generation instruction held in the buffer is read from the storage means, and the musical sound based on the mute waveform data is read. Start to pronounce
2. The waveform selection apparatus according to claim 1, wherein when the determination means determines that there is a sound, the waveform selection apparatus is controlled so as not to read the mute waveform data from the storage means.

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