JP4953084B2 - Sound data generating apparatus and program - Google Patents

Description

  The present invention relates to a sound data generation device and a program.

In recent years, more and more realistic sounds have been generated by computers. For example, sounds associated with natural phenomena such as “rainfall sound” and “breeze sound” can be reproduced very skillfully on a computer (see Patent Document 1).
For example, in the case of “raining sound”, a sound having a characteristic waveform is generated for each natural phenomenon, such as “zazar”, and “breeze” is “breeze sound”. The sound of the natural phenomenon is reproduced by repeatedly converting the waveform data simulating the characteristics of the sound into sound.
Japanese Patent Application Laid-Open No. 07-140973

  By the way, it is clear from the example that the above-mentioned sound of rain comes from the collision of a lot of raindrops with the ground, and the sound of the breeze comes from the flow and vibration of many gas molecules existing in the air. As described above, most of the sounds generated in nature are generated by the frequent interaction of many particles when viewed on a small scale.

For example, when a single raindrop collides with the ground, sounds such as “potting”, “petti”, and “pachi” are generated depending on the state of collision between each raindrop and the ground and the mutual relationship with other raindrops. To do. When countless raindrops collide with the ground continuously, a sound is generated in which different sounds are superimposed on each other. In this way, a large number of sounds with different sizes, phases, attenuation states, and generation timings are overlapped. As a result, the sound of rain (many raindrops) falls, Perceived by humans.
In this way, sounds that occur in nature are not listened with distinct sound components derived from individual interactions when listened as a whole, but they are actually composed of different sounds each time. Sounds that cannot be reproduced again are generated. It is thought that the “randomness” and “non-reproducibility” of such sounds give “naturalness” to sounds in nature.

  However, since the sound generated by the conventional computer including the above-mentioned Patent Document 1 is a sound in which predetermined waveform data is repeatedly read, the “randomness” and “non-reproduction” described above are included in the sound. There is a problem that the so-called “naturalness” cannot be felt due to lack of “sexuality”.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a sound data generation device and a program for generating a natural sound associated with the behavior of a large number of particles under a certain law. .

  The sound data generation device according to the present invention performs virtual space setting means for setting a virtual space and a calculation for continuously releasing virtual particles to the virtual space, and a plurality of virtual data provided along a specific direction. A particle emitting means, a trajectory calculating means for calculating the trajectory of each virtual particle emitted by the calculation of the virtual particle emitting means, including a collision between the virtual particles, and a virtual for setting at least one virtual sounding body Sound generator setting means, sound data generating means for calculating interaction between the virtual sound generator and the virtual particles, and generating sound data based on the interaction, the plurality of virtual particle emitting means and the virtual particles provided In addition to changing the relative position of the sounding body, the relative position change includes moving means for including the specific direction as a component.

  The sound data generation device according to the present invention includes a virtual space setting unit that sets a virtual space, at least one virtual particle emitting unit that performs an operation of continuously releasing virtual particles to the virtual space, and the virtual particles. Orbital calculation means for calculating the trajectory of each virtual particle emitted by the calculation of the emission means, including collision between the virtual particles, and virtual sounding body setting means for setting a plurality of virtual sounding bodies along a specific direction A sound data generating means for calculating an interaction between the virtual sounding body and the virtual particle and generating sound data based on the interaction; a relative relationship between the virtual sounding body provided in plurality and the virtual particle emitting means; In addition to changing the position, the relative position change includes moving means for including the specific direction as a component.

  The sound data generation device according to the present invention includes a virtual space setting unit that sets a virtual space, at least one virtual particle emitting unit that performs an operation of continuously releasing virtual particles to the virtual space, and the virtual particles. A trajectory computing means for computing the trajectory of each virtual particle emitted by the computation of the ejecting means, including a collision between the virtual particles, a virtual sounding body setting means for setting at least one virtual sounding body, and the virtual Calculating the interaction between the sounding body and the virtual particle, and generating sound data based on the interaction; and either one of the virtual particle emitting means or the virtual sounding body, the virtual space And moving means for repeatedly and circulating the inside.

  The program according to the present invention performs a virtual space setting unit for setting a virtual space and a calculation for continuously releasing virtual particles to the virtual space, and a plurality of virtual computers provided along a specific direction. A particle emitting means, a trajectory calculating means for calculating the trajectory of each virtual particle emitted by the calculation of the virtual particle emitting means, including a collision between the virtual particles, and a virtual for setting at least one virtual sounding body Sound generator setting means, sound data generating means for calculating interaction between the virtual sound generator and the virtual particles, and generating sound data based on the interaction, the plurality of virtual particle emitting means and the virtual particles provided The relative position of the sounding body is changed, and the relative position change is made to function as a moving unit that includes the specific direction as a component.

  The program according to the present invention includes a computer, a virtual space setting unit that sets a virtual space, at least one virtual particle emitting unit that performs an operation of continuously releasing virtual particles to the virtual space, and the virtual particles. Orbital calculation means for calculating the trajectory of each virtual particle emitted by the calculation of the emission means, including collision between the virtual particles, and virtual sounding body setting means for setting a plurality of virtual sounding bodies along a specific direction A sound data generating means for calculating an interaction between the virtual sounding body and the virtual particle and generating sound data based on the interaction; a relative relationship between the virtual sounding body provided in plurality and the virtual particle emitting means; In addition to changing the position, the relative position change functions as a moving unit that includes the specific direction as a component.

  The program according to the present invention includes a computer, a virtual space setting unit that sets a virtual space, at least one virtual particle emitting unit that performs an operation of continuously releasing virtual particles to the virtual space, and the virtual particles. A trajectory computing means for computing the trajectory of each virtual particle emitted by the computation of the ejecting means, including a collision between the virtual particles, a virtual sounding body setting means for setting at least one virtual sounding body, and the virtual Calculating the interaction between the sounding body and the virtual particle, and generating sound data based on the interaction; and either one of the virtual particle emitting means or the virtual sounding body, the virtual space It is characterized by functioning as a moving means for moving in a repetitive and circulating manner.

  According to the sound data generation apparatus or program according to the present invention, it is possible to generate a natural sound associated with the behavior of a large number of particles under a certain law.

(Outline of the present invention)
The sound data generation device according to the present invention emits a large number of virtual particles into a virtual space formed by computation of a computer and moves a vibrating body (such as a string) in the virtual space. Then, the state of interaction (collision, etc.) between the virtual particles and the vibrating body is calculated, and sound data is generated based on the vibration state of the vibrating body based on the calculation result.

  FIG. 1 is an example of a monitor display in the sound data generation process. The virtual particles 200 are emitted into the virtual space 100 from the tip portion of the sprinkler 150. Then, the virtual particles 200 “drop” toward the lower side of the screen according to the gravity set in the virtual space 100, bounce off the wall surface of the virtual space 100, or collide with each other. As a result, a large number of virtual particles 200 move randomly in the virtual space 100. In the virtual space 100 in which such a large number of virtual particles 200 are flying, a string 120 is provided as a vibrating body (sounding body). When each virtual particle 200 passes through the region of the string 120 and “repels” the string, the string 120 vibrates, and sound data is generated based on the vibration state of the string 120. At this time, when the sprinklers 150 are arranged in the virtual space 100 at a predetermined interval and the string 120 is moving in the virtual space 100, the string 120 collides with the virtual particle 200 at various timings, and various types are generated. The rhythm is pronounced.

(A: Configuration)
Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

(A-1: Overall configuration)
FIG. 2 is a diagram showing the overall configuration of the sound data generation system 1 according to the present invention. The sound data generation system 1 includes a sound data generation device 10 as a program execution device, a mouse 20, a monitor 30, and a multipoint controller 40.

(A-2; Configuration of each device)
First, the hardware configuration of the sound data generation device 10 will be described with reference to FIG.
The sound data generation device 10 includes a control unit 101, an optical disc playback unit 102, a ROM (Read Only Memory) 103, a RAM (Random Access Memory) 104, and an I / O unit 105. These units are connected to each other via a bus 109.

  A control unit 101 shown in the figure is, for example, a CPU (Central Processing Unit), and executes various control programs read from the ROM 103 to perform sound and video signal processing and control of each unit.

The optical disk reproducing unit 102 reads data from an optical disk such as a CD-ROM / DVD-ROM.
The ROM 103 stores various control programs executed by the control unit 101.
The RAM 104 is used as a work area by the control unit 101.

The I / O unit 105 mediates transmission / reception of signals with the device connected to the sound data generation device 10. Specifically, a signal indicating the operation content from the mouse 20 and the multipoint controller 40 is received and output to the control unit 101, and sound data and video data received from the control unit 101 are output to the monitor 30.
The above is the configuration of the sound data generation device 10.

  Next, the configuration of the mouse 20 will be described with reference to FIG. The mouse 20 has a button 22 on the upper surface (see (a) in the figure) of the main body 21 and a movement detection means 24 on the lower surface (see (b) in the figure). In addition, the mouse 20 is connected to the sound data generation device 10 via the communication cable 23, and data indicating the operation content is transmitted to the sound data generation device 10 via the communication cable 23.

In the mouse 20, when the main body 21 is moved, the movement detection unit 24 generates an operation signal indicating the movement direction and the movement amount, and outputs the operation signal via the communication cable 23. The control unit 101 that has received the signal performs a process of moving the cursor on the screen of the monitor 30 based on the operation signal.
When the button 22 is pressed (hereinafter referred to as “click”), the mouse 20 generates a click operation signal indicating that the click operation has been performed and outputs the click operation signal via the communication cable 23. Receiving the click operation signal, the control unit 101 recognizes the coordinate where the cursor is located at the time of clicking, and recognizes that the selection process has been performed on the icon or the like displayed at the coordinate.
In addition, when the main body 21 is moved in a state where the button 22 is pressed and an operation for releasing the pressing of the button 22 (hereinafter, dragging) is performed, the moving direction and movement of the main body 21 while the button 22 is being pressed are moved. An amount and a signal indicating that a drag operation has been performed are generated and output via the communication cable 23. The control unit 101 that has received the signal recognizes that the selection process has been performed on the area on the screen selected by the drag operation, the icon included in the area, and the like.

Next, the configuration of the monitor 30 will be described with reference to FIG. The monitor 30 displays a video based on the video data received from the sound data generation device 10. Each point on the monitor screen is set with coordinates having coordinates (0, 0) at the upper left of the screen and coordinates (756, 1024) at the lower right as shown in FIG.
As shown in FIG. 5, a sound data reproducing unit 30 a is provided below the monitor screen, and sounds are emitted based on the sound data received from the sound data generating device 10.

  Next, the configuration of the multipoint controller 40 will be described with reference to FIG. As illustrated in FIG. 6A, the multipoint controller 40 includes a touch panel 42. As shown in the figure, the touch panel 42 is set with coordinates having the upper left corner of the screen as coordinates (0, 0) and the lower right corner as coordinates (756, 1024). The touch panel 42 has sensing means for sensing that a specific point on the touch panel is pressed. When the sensing means senses that a specific point on the panel is pressed, the position of the pressed point is displayed. The pressed position information including the indicated coordinates is output to the sound data generation device 10 via the communication cable 41. When a plurality of points are pressed at the same time, the pressed position information is generated and output in parallel for each of the plurality of pressed points.

  When receiving the pressed position information from the multipoint controller 40, the control unit 101 of the sound data generation device 10 reads the coordinates included in the pressed position information and determines that a point corresponding to the coordinates is selected on the monitor 30 screen. To do. FIG. 6B is a diagram showing a screen display of the monitor 30. For example, when the hand A and the hand B press the touch panel 42 as shown in FIG. 6A, the coordinates indicating the position pressed by the hand A or the coordinates indicating the position pressed by the hand B are written. The pressed position information is continuously output to the control unit 101 while each point is pressed. When receiving the pressed position information, the control unit 101 determines that the points A and B on the monitor screen shown in FIG. 6B have been selected.

(A-3: Program structure)
Next, the control program stored in the ROM 103 will be described. The control program includes various programs that are executed by the control unit 101 of the sound data generation apparatus 10 to generate sound data. Only the main programs will be described below.

  The control program includes a space characteristic control program, an object control program, a particle motion control program, a string vibration control program, a video control program, a sound data generation program, and the like.

  The spatial characteristic control program controls various characteristics that are set in the virtual space 100 such as gravity and affect the motion of the virtual particles 200. The object control program controls the arrangement of an object (sprinkler 150) that causes the virtual particles 200 to appear in the virtual space 100. The particle motion control program calculates the motion of the virtual particle 200 in the virtual space 100. The string vibration control program calculates the vibration state of the string 120. The video control program displays behaviors such as the motion of the virtual particle 200 in the virtual space 100 and the vibration of the string 120 given as a calculation result on the television monitor screen. The sound data generation program generates sound data based on the vibration state of the string 120.

(A-4; control of virtual space)
Hereinafter, control of the virtual space 100 by the space characteristic control program will be described.
FIG. 7 is a diagram illustrating an example of the screen of the monitor 30. On the screen, the framework of the virtual space 100 is displayed. A control panel 400 is displayed on the right side of the virtual space 100. The virtual space 100 is controlled as follows based on an operation on the control panel 400 by the user.

  In the virtual space 100, “space characteristics” as exemplified below are set. When the space characteristic icon 404 at the bottom of the control panel 400 is pressed, the control unit 101 displays a predetermined option on the screen of the monitor 30. FIG. 8 is a diagram showing an example of the display. The user selects an option related to the direction of gravity displayed on the screen and writes the magnitude of the gravitational acceleration. Further, it is assumed that the resistance force acting when the virtual particle 200 moves is proportional to the speed of the virtual particle 200, and a proportional constant for determining the resistance force corresponding to the speed is written. The control unit 101 reflects the input content in the calculation of the behavior of the particle motion in the particle motion control program.

  The settings related to the virtual space 100 may be written in advance as a template in a control program or the like. For example, in a certain template, the gravitational field is set at the lower part of the screen, and a resistance force proportional to the speed acts on the virtual particle 200 moving in the virtual space 100, contrary to the direction of movement, and the proportionality constant is “ If a large value corresponding to “underwater” is set, the user simply selects the template, and the virtual space 100 is a container filled with water installed in a space with gravity. Such a setting can be easily performed.

(A-5: Virtual particle motion)
Below, the control method of the motion of the virtual particle 200 by a particle motion control program is demonstrated.
(1) Appearance of Virtual Particle 200 First, the appearance of the virtual particle 200 will be described with reference to FIG. In the virtual space 100 according to the present embodiment, a sprinkler 150 is provided as a device for generating the virtual particles 200 in the virtual space 100.

  The sprinkler 150 is set by dragging in the virtual space 100 when the sprinkler icon 401 is clicked after the initial speed 402 and frequency 403 values of the control panel 400 are written.

  The sprinkler 150 has a discharge port 150 a, and each virtual particle 200 is discharged from the discharge port 150 a at the initial velocity written at the initial velocity 402 and the frequency written at the frequency 403. The virtual particles 200 are randomly emitted so that the average is the number written in the frequency 403 per unit time.

(2) Motion of Virtual Particle 200 The particle motion control program stored in the ROM 103 controls the motion of the virtual particle 200 in the virtual space 100 according to rules (a) to (c) described below. The following rules imitate the mechanical properties and laws of objects on the earth.
(A) The virtual particle 200 has a predetermined volume (v) and mass (m).
(B) There is a relationship of F = mα between the force F acting on the virtual particle 200, the mass m of the virtual particle 200, and the acceleration α. For example, in this embodiment, since a gravity field exists downward in the virtual space 100, a force having a magnitude of mg (g is gravitational acceleration) always acts downward on the virtual particle 200.
(C) When the virtual particles 200 collide with each other and the framework of the virtual particles 200 and the virtual space 100 collide, a complete elastic collision is performed with a rebound coefficient of 1.

(3) Disappearance of Virtual Particle 200 The virtual particle 200 that has reached the bottom of the framework of the virtual space 100 is set to disappear.

(A-6: Generation of sound data)
The sound data generation device 10 generates sound data as described below by a sound data generation program stored in the ROM 103.

  The vibration of the string 120 is calculated by a string vibration control program stored in the ROM 103. Specifically, physical simulation is performed based on the elasticity (material) of the strings, the cross-sectional area of the strings, the tension of the strings, the amount of displacement of the strings. As a result of the simulation, the displacement amount of each part of the string at each time is calculated, and the amplitude, frequency, attenuation mode, and the like of the sound generated from the string are derived from the calculation result.

  Note that the sound data generation device 10 generates sound data using MAX / MSP. Note that MAX / MSP includes a music programming language MAX and an extension MSP for acoustic signal processing. According to MAX / MSP, various modules can be connected to create synthesizers, effectors, sequencers, etc., and music can be automatically generated by patching. Intuitive programming and operation through a visual programming environment Can do.

(B: Operation)
Below, operation | movement of each part at the time of the sound data generation apparatus 10 producing | generating sound data is demonstrated.
First, when the sound data generating apparatus 10 is turned on, the control unit 101 reads various control programs from the ROM 103 and loads them into the RAM 104.

(B-1: Initial setting process)
First, the control unit 101 performs an initial setting process. FIG. 10 is a flowchart showing the flow of the initial setting process.
In step SA100, the spatial characteristics of the virtual space 100 are set. The user of the sound data generation system 1 presses the space characteristic icon 404 (see FIG. 9) on the control panel 400 to display a screen for parameter setting (see FIG. 8) on the monitor 30. And the control part 101 sets the space characteristic of the virtual space 100 according to the input content, ie, the gravity field and resistance force in the virtual space 100.

In the present embodiment, in the setting of the gravitational field, when the downward direction of the drawing is selected as the direction of gravity and the value of the gravitational acceleration is written, the gravity of the value set in the downward direction of the screen acts on the virtual particle 200. The virtual space 100 is set as if it is a space provided in the vertical direction.
In addition, when the value of the proportionality constant is written in the setting of the resistance force, the resistance force proportional to the moving speed of the virtual particle 200 works in the direction opposite to the movement. Then, the environment is set as if the virtual space 100 is filled with air and water corresponding to the proportionality constant.

  In step SA110, a means (sprinkler 150) for causing the virtual particles 200 to appear in the virtual space 100 is set. After the parameters are written on the control panel 400 by the user, when the sprinkler icon 401 is clicked and an area in the virtual space 100 is designated, the sprinkler 150 is set. The arrangement of the sprinklers 150 can be freely determined by the user. In this embodiment, for example, as shown in FIG. 9, a case where a plurality of sprinklers 150 are arranged in a line at a non-constant interval will be described.

(B-2; vibrator setting processing)
Prior to the description of the process for releasing the virtual particles 200 into the virtual space 100, a vibration body setting process for setting a vibration body that generates sound by interaction with the virtual particles 200 in the virtual space 100 will be described. The vibrator setting process is performed as an interrupt process for a sound data generation process described later.

  In the present embodiment, a string 120 is provided as a vibrating body. FIG. 12 is a flowchart showing the flow of the vibrator setting process. In step SC100, the control unit 101 determines whether or not the pressed position information is received from the multipoint controller 40. If the determination result of step SC100 is “NO”, the process of step SC100 is repeated. If the determination result in step SC100 is “YES”, step SC110 is performed.

  The control unit 101 reads the coordinates included in the pressed position information received from the multipoint controller 40 and temporarily stores the coordinates in the RAM 104. Then, a string 120 (vibrating body) is provided in the virtual space 100 so that the two positions (coordinates) included in the pressed position information are both ends (step SC110).

  The string 120 provided as described above is continuously provided while the touch panel 42 is pressed. The string 120 can be moved in the virtual space 100. In step SC120, control unit 101 determines whether or not the coordinates included in the pressed position information have been changed. When the position of the touch panel 42 pressed by the user is slid, the determination result in step SC120 is “YES”, and the installation position of the string 120 is slid. That is, the installation position of the string 120 is changed in correspondence with the pressed position that changes from moment to moment (step SC130). On the other hand, when the determination result of step SC120 is “NO”, the process of step SC120 is repeated, and the string 120 is continuously provided at the same position.

In step SC140, the control unit 101 determines whether or not the supply of the pressed position information that instructs the installation of the string 120 is stopped. When the user stops pressing the touch panel 42, the pressed position information is not supplied to the control unit 101, the determination result in step SC140 is “YES”, and the string 120 corresponding to the position where the pressed is stopped disappears (step SC150). On the other hand, when the button is continuously pressed (step SC140; “NO”), the processing after step SC120 is repeated.
In step SC160, the control unit 101 determines whether or not the vibrator setting process has been completed. If the decision result in the step SC160 is “YES”, the vibrator setting process is terminated. If the determination result in step SC160 is “NO”, the processes in and after step SC100 are performed again. The above is the flow of the vibrator setting process.

(B-3; sound data generation processing)
When the initial setting process is performed, the control unit 101 starts the sound data generation process. FIG. 11 is a flowchart showing the flow of sound data generation processing.

  In step SB110, the sprinkler 150 causes the virtual particles 200 to appear in the virtual space 100. Then, for each of the appearing virtual particles 200, the processing from step SB120 onward is performed in parallel.

In step SB120, the motion of the virtual particle 200 after a minute unit time is calculated. When the virtual particle 200 collides with the wall of the virtual space 100 or another virtual particle 200, the virtual particle 200 rebounds with a complete elastic collision, and a new velocity is set for the virtual particle 200. Further, when no collision occurs, the virtual particle 200 moves to a new position by multiplying the speed of the virtual particle 200 by a minute time.
Note that in step SB120, the trajectory is calculated simultaneously for all the virtual particles 200 that appear in the virtual space 100 in step SB110, so that a large number of randomly appearing virtual particles 200 frequently interact with each other. It will be repeated. Therefore, even if various settings of the virtual space 100 are the same, different behaviors of the virtual particles 200 are caused each time.

  In step SB130, it is determined whether or not it reaches the bottom surface of the virtual space 100 and disappears by the processing in step SB120. If the determination result in step SB130 is “YES”, the virtual particle 200 is erased from the screen, and the process for the virtual particle 200 is terminated. When the determination result of step SB130 is “NO”, the processes after step SB140 are performed.

  In step SB140, it is determined whether or not the virtual particle 200 collides with the string 120. When the string 120 set by the above-described vibrating body setting process (interrupt process) interacts with the virtual particle 200, the determination result in step SB140 is “YES”, and the process in step SB150 is performed. On the other hand, when the determination result of step SB140 is “NO”, the processes after step SB120 are performed again.

In step SB150, the vibration state of the string 120 interacting with the virtual particle 200 in step SB140 is calculated by simulation. Then, from the result of the simulation calculation, the amplitude, frequency, tone color, etc. of the sound generated in the string 120 are analyzed, and sound data representing the sound is generated. In this case, even when the string 120 interacts with the virtual particle 200 while moving in the virtual space 100, the string 120 vibrates in the same manner as when the string 120 interacts with the virtual particle 200 when stationary. Let
In step SB160, sound data is generated based on the vibration state of the string 120.

As described above, the sprinklers 150 are arranged in a single row and at non-constant intervals. Therefore, the trajectory and location of the virtual particle 200 at each time has a pattern corresponding to the arrangement of the sprinkler 150, and there is a case where the string 120 moves in the virtual space 100 in which the virtual particle 200 is moving. The virtual particle 200 and the string 120 interact with each other in a cycle, and a periodic sound is generated. Furthermore, since the virtual particles 200 are randomly emitted from the sprinkler 150 and a large number of virtual particles 200 repeatedly interact with each other, the generated sound data has randomness and non-reproducibility. Is granted.
When step SB160 ends, the processing after step SB120 is performed again on the virtual particle 200 that interacts with the string 120.

  In parallel with the above sound data generation processing, the motion of the virtual particles 200 and the strings 120 in the virtual space 100 and the vibration state of the strings 120 are displayed on the monitor 30. Since the generated sound data corresponds to the display, the user can view the screen display corresponding to the sound emitted as it is.

The sound data generated in step SB160 is output to the sound data reproducing unit 30a, and the sound data reproducing unit 30a reproduces the sound data. The control unit 101 also provides information on various parameters related to sound data generation (hereinafter, setting information) such as the arrangement mode of the sprinkler 150, the installation / movement mode of the string 120, and the spatial characteristics set in the virtual space 100. Write to the RAM 104 for each trial.
By reading the setting information written in the RAM 104, the control unit 101 can perform sound data generation processing again under the same condition setting. Even if the sound data is generated again under the same condition setting as described above, the behavior of each virtual particle 200 is different each time, so that microscopically different sound data is generated.

(C: Modification)
As mentioned above, although embodiment of this invention was described, this invention can be implemented with a various aspect as follows.

(1) In the above embodiment, the case where the spatial characteristics such as gravity and resistance force are not changed during the sound data generation process has been described. However, the spatial characteristics can be changed during the sound data generation process. Anyway. For example, if it is programmed in advance so that the direction of gravitational acceleration changes periodically, the movement of the virtual particle 200 periodically changes due to the periodic change of the gravitational acceleration, and the rhythm of the interaction with the string 120 Will change in various ways.

(2) In the above embodiment, the case where the string 120 is provided as the vibrating body has been described. However, the vibrating body is not limited to a string, and for example, a vibrating body (hereinafter referred to as a surface) having a vibrating surface simulating a drum or a cymbal may be provided. Hereinafter, the configuration of the “surface” and the control of the vibration will be described.
When the surface 125 is provided in the virtual space 100, the following may be performed. Since the display of the virtual space 100 is two-dimensional, the surface 125 may be displayed as a sectional view of the surface. That is, for example, when a start point and an end point are specified in the virtual space 100, a straight line connecting the specified start point and end point becomes a cross section of the surface 125, and the display screen of the surface 125 and the virtual space 100 It suffices that the surface 125 is provided so that the two are orthogonal to each other.
When the surface interacts with the virtual particle 200, a physical simulation regarding the vibration surface may be performed to generate surface-specific sound data.
In the above embodiment, the case where the virtual particle 200 interacts with the string 120 has been described as passing through the string 120 without rebounding. However, in the interaction with the surface, the virtual particle 200 rebounds. These conditions may be provided.

(3) In the above-described embodiment, the case where the vibration of the string 120 is calculated by simulation of a physical model has been described. However, waveform data representing a string-specific sound may be stored in the ROM 103 in advance, and the waveform data may be read each time the virtual particle 200 and the string 120 collide. In that case, multiple types of waveform data are stored so that different waveform data can be selectively read for each string according to the characteristics of the string (string thickness, length, etc.), amplitude, pitch, etc. May be converted into pronunciation.

(4) In the said embodiment, the case where the appearance pattern of the virtual particle 200 which appears from the sprinkler 150 was random was demonstrated. However, the frequency and appearance location of the appearance pattern may be changed periodically. Moreover, although the case where the initial velocity was uniform for every virtual particle 200 was demonstrated, you may give periodicity. In short, the interaction between the virtual particle 200 and the string 120 may be given a rhythm by giving the appearance pattern of the virtual particle 200 periodicity.

(5) In the above embodiment, the case where the virtual particle 200 passes through the string 120 even if it approaches the string 120 has been described. However, in the interaction between the string 120 and the virtual particle 200, the virtual particles 200 can also interact with each other. Similar to the action, collision and rebound may occur.

(6) In the above embodiment, the case where the virtual particle 200 freely falls according to the gravity set in the virtual space 100 has been described. However, a structure (regulator) that affects the motion of the virtual particle 200 may be provided in the virtual space 100.
FIG. 13 is an example of a screen display of the monitor 30 when the wall 160, which is an example of a regulatory body, is arranged. When the user clicks the wall icon 405 at the bottom of the control panel 400 and then performs a drag operation, the control unit 101 displays a rectangular area with the start and end points of the drag operation as diagonal lines on the screen as a wall 160. For example, when the cursor 170 is dragged from 170 (a) to 170 (b) in the figure, the wall 160 (a) is set.
Further, when the cursor 170 is moved to the apex of the wall 160 that has been set and the button 22 is pressed and the mouse 20 is moved while the button is pressed, the cursor 170 moves with the center of gravity of the wall 160 as the center. The wall 160 is rotated. For example, when the cursor 170 is moved to the apex (the position of the cursor 170 (c)) of the wall 160 (c) and moved to the position indicated by the cursor 170 (d) while the button 22 is pressed, the wall 160 is moved to the wall 160 (c). It is rotated to the position indicated by (d).
When the same operation is performed with the cursor 170 positioned on the inner area of the wall 160, the wall 160 is moved as the cursor 170 moves. For example, when the cursor 170 is moved to the inner area of the wall 160 (e) (the position of the cursor 170 (e)) and moved to the position indicated by the cursor 170 (f) while the button 22 is pressed, the wall 160 is moved to the wall 160 (e). It is moved to the position indicated by 160 (f).
Further, when the wall 160 is double-clicked during the sound data generation process, the selected wall 160 may disappear.
By providing the regulating body in this way, the trajectory and existence position of the virtual particles 200 can be controlled in various ways, and sound data of various rhythms can be generated depending on the arrangement form of the regulating body.

(7) In the above embodiment, the case where a plurality of sprinklers 150 are fixedly provided and one string 120 translates in the virtual space 100 has been described. However, since the relative positional relationship between the orbit of the string 120 and the virtual particle 200 only needs to periodically change, for example, the following processing may be performed.
(A) The string 120 may be rotated. In that case, as shown in area A (left area of the screen) in FIG. 14, the turntable 130 is provided in the virtual space 100, and the string 120 is provided so as to overlap the turntable 130. The turntable 130 rotates at a predetermined angular velocity, and the string 120 is fixed on the turntable 130, so that it rotates in the virtual space 100. For example, as shown in FIG. 14, if the string 120 is set to interact with the virtual particle 200 when it crosses a predetermined position, the string 120 and the virtual particle 200 will periodically interact to generate a rhythmic sound. Is generated.
As shown in region B (right region of the screen) in FIG. 14, when the sprinkler 150 is provided so as to overlap the turntable 130, the sprinkler 150 rotates in the virtual space 100, and the virtual particles 200 are moved in all directions. discharge. As a result, the virtual particles 200 emitted from the sprinkler 150 periodically interact with the string 120.
(B) The provided sprinklers 150 may move together in the virtual space 100. That is, in FIG. 9, the string 120 moves so as to cross the virtual particle 200 emitted from the sprinkler 150, but conversely, the string 120 is fixed in the virtual space 100, and the sprinkler 150 moves left and right. By moving, the virtual particles 200 may periodically interact with the string 120. Further, the sprinkler 150 and the string 120 may move together.
(C) In the above embodiment, a case where a plurality of sprinklers 150 and one string 120 are provided is illustrated, but one sprinkler 150 and a plurality of strings 120 may be provided. Also in that case, the string 120 is moved integrally, or the sprinkler 150 is moved, so that sound is generated periodically.
(D) The wall 160 shown in the modified example (6) may be moved periodically. By doing so, the orbits / presence positions of the virtual particles 200 are periodically controlled by the wall 160, and a rhythm can be generated.
Even with the above, periodicity and rhythm are generated in the interaction between the string 120 and the sprinkler 150.

(8) In the above embodiment, virtual particles 200 having different aspects may appear periodically from the sprinkler 150. For example, the virtual particles 200 having different characteristics such as speed, size, and mass may be periodically emitted, or the sprinkler 150 may release the virtual particles 200, such as a widening launch angle or a firing frequency. The aspect may be changed periodically. By doing so, the interaction between the virtual particles 200 and the string 120 generates sounds with different characteristics periodically, and can generate various rhythms.

(9) In the above embodiment, a case has been described in which a program for realizing a characteristic function of the sound data generation device 10 according to the present invention is written in the ROM 103 in advance, but a magnetic tape, a magnetic disk, a flexible The program may be recorded and distributed on a computer-readable recording medium such as a disk, optical recording medium, magneto-optical recording medium, RAM, ROM, etc., and the program is distributed by downloading via an electric communication line such as the Internet network. You may make it do.

(10) In the above embodiment, the case where the movement of the string 120 is controlled by the multipoint controller 40 has been described. However, a means for automatically moving the string 120 may be provided in the virtual space 100. For example, a conveyor 180 is provided in the virtual space 100 as shown in a region A (screen left region) in FIG. The conveyor 180 rotates at a constant speed in the direction of the arrow, and moves an object (in this case, a plurality of sprinklers 150) arranged on the belt portion of the conveyor 180. Also, as shown in region B (right region of the screen) in FIG. 15, a plurality of strings 120 are arranged on the belt portion of the conveyor 180. With the above configuration, the sprinkler 150 or the string 120 moves repetitively or cyclically, and the virtual particles 200 emitted from the sprinkler 150 interact with the string 120 rhythmically.

(11) In the above-described embodiment, when the virtual particles 200 collide with each other and the framework of the virtual particle 200 and the virtual space 100 collide, the case where a complete elastic collision is performed with the rebound coefficient 1 is described. A value other than 1 may be used. That is, an inelastic collision with a rebound coefficient of 0 to 1 may be performed. Although it is contrary to the laws of nature, a value exceeding 1 may be used as the rebound coefficient when calculating the speed of each object after the collision.

(12) In the above-described embodiment, the case where the sprinkler 150 is disposed as illustrated in FIG. 9 has been described as an example. However, the arrangement of the sprinkler 150 may be determined as appropriate by the user. For example, the horizontal coordinate of the monitor screen of each sprinkler 150 may be determined so as to correspond to the rhythm of the sound to be generated by the sound data generation system 1.
Further, in the above embodiment, the virtual particles 200 may be released in a different manner for each sprinkler 150. For example, when the virtual particles 200 are emitted at different emission frequencies for each of the plurality of sprinklers 150 arranged, the number of virtual particles 200 that collide with the string 120 moving in the virtual space 100 changes, so that the generated sound Rhythm is born. When the virtual particles 200 having different properties (mass, size, etc.) are released for each sprinkler 150, the vibration mode of the strings 120 when the virtual particles 200 collide with the strings 120 moving in the virtual space 100 is the sprinkler. Since it changes every 150, a rhythm is born in the generated sound.
In addition, when different properties are used for each sprinkler 150 as described above, the display mode of the sprinkler 150 may be determined in association with the properties. For example, the size and discharge speed of the virtual particles 200 in each sprinkler 150 may be expressed by changing the length and diameter of the nozzles of the sprinkler 150.

It is the figure which showed an example of the screen display of the monitor 30 in a sound data generation process. 1 is a diagram illustrating an overall configuration of a sound data generation system 1. FIG. 1 is a diagram illustrating a configuration of a sound data generation device 10. FIG. FIG. 3 is a diagram showing the appearance of a mouse 20. It is the figure which showed the screen of the monitor. 4 is a diagram for explaining functions of a multipoint controller 40. FIG. 6 is a diagram showing an example of a screen display of a monitor 30. FIG. It is the figure which showed the screen display for setting a spatial characteristic. It is a figure for demonstrating the installation method of the appearance means of the virtual particle. It is the flowchart which showed the flow of the initial setting process. It is the flowchart which showed the flow of the sound data generation process. It is the flowchart which showed the flow of the vibrating body setting process. It is a figure for demonstrating the arrangement | positioning method of a control element. It is a figure explaining the movement of the object by the turntable 130. FIG. It is a figure explaining the movement of the object by the conveyor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sound data generation system, 10 ... Sound data generation apparatus, 20 ... Mouse, 21 ... Main body, 22 ... Button, 23 ... Communication cable, 24 ... Movement detection means, 30 ... Monitor, 40 ... Multipoint controller, 41 ... Communication Cable, 42 ... Touch panel, 100 ... Virtual space, 101 ... Control unit, 102 ... Optical disc playback unit, 103 ... ROM, 104 ... RAM, 105 ... I / O unit, 109 ... Bus, 120 ... String, 130 ... Turntable 150 ... Sprinkler, 160 ... Wall, 170 ... Cursor, 180 ... Conveyor, 200 ... Virtual particle, 400 ... Control panel

Claims (6)

Virtual space setting means for setting a virtual space;
A virtual particle emitting unit that performs a calculation to continuously release virtual particles to the virtual space and is provided in a plurality along a specific direction;
A trajectory computing means for computing the trajectory of each virtual particle emitted by the computation of the virtual particle emitting means, including the collision between the virtual particles;
Virtual sound generator setting means for setting at least one virtual sound generator;
A sound data generating means for calculating an interaction between the virtual sounding body and the virtual particles and generating sound data based on the interaction;
And changing the relative positions of the plurality of virtual particle emitting means and the virtual sounding body, and moving means for including the specific direction as a component in the relative position change. Sound data generation device. Virtual space setting means for setting a virtual space;
At least one virtual particle emitting means for performing an operation of continuously emitting virtual particles to the virtual space;
A trajectory computing means for computing the trajectory of each virtual particle emitted by the computation of the virtual particle emitting means, including the collision between the virtual particles;
Virtual sound generator setting means for setting a plurality of virtual sound generators along a specific direction;
A sound data generating means for calculating an interaction between the virtual sounding body and the virtual particles and generating sound data based on the interaction;
The moving means for changing the relative positions of the virtual particle emitting means and the plurality of virtual sounding bodies provided, and for causing the relative position change to include the specific direction as a component. Data generator. Virtual space setting means for setting a virtual space;
At least one virtual particle emitting means for performing an operation of continuously emitting virtual particles to the virtual space;
A trajectory computing means for computing the trajectory of each virtual particle emitted by the computation of the virtual particle emitting means, including the collision between the virtual particles;
Virtual sound generator setting means for setting at least one virtual sound generator;
A sound data generating means for calculating an interaction between the virtual sounding body and the virtual particles and generating sound data based on the interaction;
A sound data generating apparatus comprising: moving means for moving one of the virtual particle emitting means and the virtual sounding body by repeating and circulating in the virtual space. Computer
Virtual space setting means for setting a virtual space;
A virtual particle emitting unit that performs a calculation to continuously release virtual particles to the virtual space and is provided in a plurality along a specific direction;
A trajectory computing means for computing the trajectory of each virtual particle emitted by the computation of the virtual particle emitting means, including the collision between the virtual particles;
Virtual sound generator setting means for setting at least one virtual sound generator;
A sound data generating means for calculating an interaction between the virtual sounding body and the virtual particles and generating sound data based on the interaction;
A program for changing the relative positions of the plurality of virtual particle emitting means and the virtual sounding body, and causing the relative position change to include the specific direction as a component. Computer
Virtual space setting means for setting a virtual space;
At least one virtual particle emitting means for performing an operation of continuously emitting virtual particles to the virtual space;
A trajectory computing means for computing the trajectory of each virtual particle emitted by the computation of the virtual particle emitting means, including the collision between the virtual particles;
Virtual sound generator setting means for setting a plurality of virtual sound generators along a specific direction;
A sound data generating means for calculating an interaction between the virtual sounding body and the virtual particles and generating sound data based on the interaction;
A program for changing a relative position between the virtual particle emitting means and a plurality of virtual sounding bodies provided, and causing the relative position change to include the specific direction as a component. Computer
Virtual space setting means for setting a virtual space;
At least one virtual particle emitting means for performing an operation of continuously emitting virtual particles to the virtual space;
A trajectory computing means for computing the trajectory of each virtual particle emitted by the computation of the virtual particle emitting means, including the collision between the virtual particles;
Virtual sound generator setting means for setting at least one virtual sound generator;
A sound data generating means for calculating an interaction between the virtual sounding body and the virtual particles and generating sound data based on the interaction;
A program for causing either one of the virtual particle emitting means or the virtual sounding body to function as a moving means for moving the virtual particle repeatedly and circulating in the virtual space.

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