JP3660379B2 - Sound source control information storage method and sound source control apparatus - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a method for storing sound source control information composed of musical score data in which music information such as a pitch of a generated sound, pronunciation, mute, and timbre effect is recorded in time order.
[0002]
The present invention also relates to a sound source control device that takes in stored musical score data at a predetermined interval, controls a sound source device based on the taken musical score data, and automatically plays music and the like, and in particular, a video game. The present invention relates to a sound source control device that controls a sound source device in accordance with a calculation result or a user operation to generate sound effects, background music (BGM), and the like.
[0003]
[Prior art]
Conventionally, in an information processing apparatus such as a video game apparatus or a personal computer, musical sounds, sound effects, etc. are generated in accordance with the progress of a game or a user's operation.
[0004]
In such a video game device or personal computer, for example, a so-called FM sound source that generates a sound having a pitch by changing the frequency of a waveform obtained by synthesizing a fundamental wave and its harmonics, or a fundamental waveform of a fundamental wave. A so-called PCM sound source or the like that generates a pitch by changing the fundamental wave read cycle in accordance with a pitch or the like that is stored is used as a sound source device that generates sound.
[0005]
In such a video game device or personal computer, for example, in response to a user's operation, sound effects to be generated, background music (BGM) start / stop, volume, etc. are immediately transmitted in real time (real time). ) Can be changed.
[0006]
For example, in the reproduction of BGM or the like, musical score data in which music information such as the pitch of a generated sound, pronunciation, mute, and timbre effect is arranged in time order together with time information is prepared in advance, This is done by sequentially setting the pitch, sound generation and mute registers of the device.
[0007]
In this way, preparing data such as BGM in the form of musical score data makes it easier to reproduce the tone, volume, and so on when playing the program, as compared to the case where the pitch, sounding and muting of the sound source device are sequentially controlled. This is a method suitable for a multimedia computer, a game, and the like that can change the pitch and the like, and that is sensitive to real-time response to a user's operation at high speed.
[0008]
In addition, as shown in FIG. 16, for example, in a video game apparatus having only one CPU 201 as an arithmetic processing unit (CPU), the control of the sound source device based on the musical score data uses this CPU 201 in time division. The musical score data is read at regular time intervals, and the BGM and the like are generated by controlling the sound generation timing, sound generation period, sound pitch, volume, etc. of the sound source device 202 based on the read music score data.
[0009]
In this way, the method of interpreting musical score data using the CPU 201 in a time-sharing manner requires a special peripheral device or the like if the processing capability of the CPU 201 is sufficiently high, so that the cost is low and it is easy to create a program.
[0010]
By the way, as shown in FIG. 17, the musical score data is recorded on the optical disc as a file composed of file header information for identifying a file and musical score data.
[0011]
Such musical score data is read from the optical disk device 205 prior to use and stored at a predetermined address in the memory 204.
[0012]
[Problems to be solved by the invention]
However, when such musical score data is stored, it is necessary to manage the address on the memory 204 where the individual musical score data is stored, and when reproducing musical score data, etc. In order to specify the data, it is necessary to specify an address on the memory 204 in which each musical score data is stored.
[0013]
In general, a plurality of musical score data are not reproduced at the same time, so that the reproduction of the plural musical score data cannot be set independently.
[0014]
However, in actual game processing or the like, it is required to change the musical score data to be reproduced in accordance with the input from the user, etc., but it is necessary to wait until the reproduction of the previous musical score data is finished. There is a problem that the response time to the input becomes long.
[0015]
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 source information storage method capable of storing sound source control information that allows easy management of musical score data.
[0016]
It is another object of the present invention to provide a sound source control device that can speed up response to input.
[0017]
[Means for Solving the Problems]
The sound source control information storage method according to the present invention is a sound source control information storage method for storing sound source control information in which control information for controlling a sound source is recorded together with time information in a storage device. Identification information is assigned to each musical score data constituting the connected musical score data when storing the musical score data obtained by adding identification information to the musical score data composed of information and connecting a plurality of musical score data added with the identification information. Information, leading address information indicating the address where the linked score data is recorded, and relative address information indicating the relative position from the leading address information of the address where each score data constituting the linked score data is stored And correspondence information indicating the correspondence between the musical score identification information and the head address and relative address.
[0018]
The sound source control device according to the present invention is a sound source control device that reads out musical score data and controls the sound source based on the read musical score data, and adds identification information to the musical score data composed of a series of sound source control information. Along with the connected musical score data, musical score identification information for identifying individual musical score data, head address information indicating the address where the linked musical score data is recorded, and individual musical score data constituting the linked musical score data are stored. A storage device storing relative address information indicating a relative position of the current address from the head address information, correspondence information indicating the correspondence between the score identification information and the start address and the relative address, and the selected score identification A reading control unit that reads out the musical score data corresponding to the information from the storage device with reference to the corresponding information, and read by the reading control unit And having a reproduction unit for controlling the sound source based on the score data.
[0019]
In addition, the sound source control device according to the present invention includes a reproduction state holding unit that holds a reproduction state of musical score data corresponding to a plurality of musical score identification information, and the read control unit corresponds to the selected plural musical score identification information. The musical score data is read from the storage device with reference to the correspondence information, and the reproducing unit has a plurality of data reproducing units for controlling the sound source based on the musical score data, and is held in the reproduction state holding unit by the plural data reproducing units. The sound source is controlled based on the musical score data based on the reproduced state of the musical score data.
[0020]
[Action]
In the method for storing sound source control information according to the present invention, when identifying information is added to music score data composed of a series of sound source control information, and connected musical score data obtained by concatenating a plurality of music score data to which identification information is added is stored. Musical score identification information assigned to each musical score data constituting the linked musical score data;
Start address information indicating the address where the linked score data is recorded,
Relative address information indicating the relative position from the start address information of the address where the individual musical score data constituting the linked musical score data is stored;
Correspondence information indicating the correspondence between the musical score identification information and the start address and relative address is stored.
[0021]
The sound source control information stored in this way is reproduced by the sound source control device of the present invention.
[0022]
In this sound source control device, when the musical score identification information of the musical score data to be reproduced is selected, the read control unit reads the musical score data corresponding to the selected musical score identification information from the storage device with reference to the correspondence information, and the reproducing unit The sound source is controlled based on the musical score data read by the read control unit.
[0023]
Thus, only by selecting the musical score identification information, the musical score data corresponding to the selected musical score identification information is reproduced.
[0024]
The reading state holding unit holds a reading state of musical score data corresponding to a plurality of musical score identification information. When a plurality of music score identification information is selected, the read control unit reads music score data corresponding to the selected music score identification information from the storage device with reference to the correspondence information.
[0025]
The reproduction unit controls the sound source by the plurality of data reproduction units based on the reproduction state of the musical score data held in the reproduction state holding unit.
[0026]
Here, since the reproduction state corresponding to certain identification information of the reproduction state holding unit is set independently, if the reproduction state corresponding to certain identification information is set, whether or not other musical score data is reproduced. Regardless, the reproduction state of the musical score data corresponding to the set reproduction state changes, for example, reproduction of musical score data is started, and the sound source is controlled based on the reproduced musical score data.
[0027]
【Example】
Hereinafter, an embodiment will be described in which the sound source control device according to the present invention is applied as a sound source control unit for generating musical sounds, sound effects, etc. in a video game device, for example.
[0028]
The sound source control information storage method according to the present invention is applied to storage of sound source control information used by the sound source control unit.
[0029]
This video game apparatus is adapted to play a game in response to an instruction from a user by reading and executing a game program stored in an auxiliary storage device such as an optical disk, for example, as shown in FIG. It has such a configuration.
[0030]
That is, the video game apparatus includes a control system 50 including a central processing unit (CPU) and its peripheral devices, a graphic system 60 including a graphic processing unit (GPU) that performs drawing in a frame buffer, musical sounds, and effects. An instruction input from a sound system 70 including a sound processing unit (SPU) for generating sound, an optical disk control unit 80 for controlling an optical disk as an auxiliary storage device, and a controller for inputting an instruction from a user And a communication control unit 90 that controls input and output from an auxiliary memory that stores game settings and the like, and a bus 100 to which the control system 50 to communication control unit 90 are connected.
[0031]
The control system 50 includes a CPU 51, a peripheral device control unit 52 that performs interrupt control, direct memory access (DMA) transfer control, and the like, a main storage device (main memory) 53 including a RAM, a main memory 53, and a graphic system. 60, and a ROM 54 storing a program such as a so-called operating system for managing the sound system 70 and the like.
[0032]
The CPU 51 controls the entire apparatus by executing an operating system stored in the ROM 54.
[0033]
The graphic system 60 stores a geometry transfer engine (GTE) 61 that performs processing such as coordinate transformation, an image processing device (GPU) 62 that performs drawing in accordance with a drawing instruction from the CPU 51, and an image drawn by the GPU 62. And an image decoder 64 for decoding image data compressed and encoded by an orthogonal transform such as a discrete cosine transform.
[0034]
The GTE 61 includes, for example, a parallel calculation mechanism that executes a plurality of calculations in parallel, and according to a calculation request from the CPU 51. Coordinate conversion, light source calculation, matrix or vector calculation can be performed at high speed.
[0035]
Specifically, this GTE 61 can perform coordinate calculations of up to about 1.5 million polygons per second when performing flat shading that draws the same color on one triangular polygon. Thus, in this video game apparatus, the load on the CPU 51 can be reduced and high-speed coordinate calculation can be performed.
[0036]
The GPU 62 draws a polygon (polygon) or the like in the frame memory 62 in accordance with a drawing command from the CPU 51. This GPU 62 can draw a maximum of about 360,000 polygons per second.
[0037]
The frame buffer 63 is formed of a so-called dual port RAM, and can perform drawing from the GPU 62 or transfer from the main memory and reading for display at the same time.
[0038]
The frame buffer 63 has a capacity of 1 Mbyte, and is treated as a matrix of pixels of 16 bits wide 1024 and 512 pixels vertically.
[0039]
An arbitrary area in the frame buffer 63 can be output as a video output.
[0040]
In addition to the display area that is output as video output, the frame buffer 63 includes a CLUT area that stores a color look-up table (CLUT) that is referred to when the GPU 62 draws polygons and the like. A texture area is provided in which a material (texture) to be inserted (mapped) into a polygon or the like that is coordinate-transformed and drawn by the GPU 62 is stored. These CLUT area and texture area are dynamically changed according to the change of the display area.
[0041]
In addition to the flat shading described above, the GPU 62 performs Gouraud shading that complements the colors of the polygon vertices to determine the color within the polygon, and texture mapping that attaches the texture stored in the texture area to the polygon. It can be done.
[0042]
When performing these Gouraud shading or texture mapping, the GTE 61 can perform coordinate calculations of up to about 500,000 polygons per second.
[0043]
The image decoder 64 decodes still image or moving image data stored in the main memory 53 under the control of the CPU 51 and stores the decoded image data in the main memory 53.
[0044]
Further, the reproduced image data is stored in the frame buffer 63 via the GPU 62 so that it can be used as the background of the image drawn by the GPU 62 described above.
[0045]
The sound system 70 is generated by a sound processing unit (SPU) 71 that generates musical sounds, sound effects, and the like based on an instruction from the CPU 51, a sound buffer 72 in which waveform data and the like are recorded by the SPU 71, and an SPU 71. And a loudspeaker 73 for outputting musical sounds, sound effects and the like.
[0046]
The SPU 71 has an ADPCM decoding function for reproducing audio data that has been adaptively differentially encoded (ADPCM) using 16-bit audio data as a 4-bit differential signal, and a waveform stored in the sound buffer 72. A reproduction function for generating sound effects by reproducing data and a modulation function for modulating and reproducing waveform data stored in the sound buffer 72 are provided.
[0047]
By providing such a function, the sound system 70 can be used as a so-called PCM sound source that generates musical sounds, sound effects, and the like based on waveform data recorded in the sound buffer 72 according to instructions from the CPU 51. It has become.
[0048]
The optical disk control unit 80 includes an optical disk device 81 that reproduces programs, data, and the like recorded on the optical disk, and a decoder 82 that decodes programs, data, and the like that are recorded after being error-corrected (ECC) encoded, for example. And a buffer 83 that speeds up the reading from the optical disk by temporarily storing the reproduction data from the optical disk device 81.
[0049]
In addition to the above ADPCM data, the audio data recorded on the optical disk reproduced by the optical disk device 81 includes so-called PCM data obtained by analog / digital conversion of an audio signal.
[0050]
As ADPCM data, for example, audio data recorded by representing a difference of 16-bit digital data (PCM data) in 4 bits is decoded by a decoder 82 and then expanded to 16-bit digital data. Supplied to the SPU 71.
[0051]
Also, as PCM data, for example, audio data recorded as 16-bit digital data is decoded by the decoder 82 and then supplied to the SPU 71 or used to drive the speaker 73 directly.
[0052]
The communication control unit 90 also includes a communication controller 91 that controls communication with the CPU 51 via the bus 100, a controller 92 that inputs instructions from the user, and a memory card 93 that stores game settings and the like. It has.
[0053]
The controller 92 has, for example, 16 instruction keys for inputting instructions from the user. According to the instructions from the communication controller 91, the controller 92 changes the state of the instruction keys by synchronous communication. Is transmitted about 60 times per second. The communication controller 91 transmits the state of the instruction key of the controller 92 to the CPU 51.
[0054]
Thereby, an instruction from the user is input to the CPU 51, and the CPU 51 performs processing according to the instruction from the user based on the game program being executed.
[0055]
Further, when it is necessary to store the settings of the game being executed, the CPU 51 transmits the stored data to the communication controller 91, and the communication controller 91 stores the data from the CPU 51 in the memory card 93. To do.
[0056]
Since the memory card 93 is connected to the bus 100 via the communication controller 91 and is separated from the bus 100, the memory card 93 can be attached and detached while the power is turned on. As a result, game settings and the like can be stored in a plurality of memory cards 93.
[0057]
The video game apparatus also includes a parallel input / output (I / O) 101 and a serial input / output (I / O) 102 connected to the bus 100.
[0058]
Then, it is possible to connect to peripheral devices via the parallel I / O 101, and to communicate with other video game devices via the serial I / O 102. ing.
[0059]
By the way, a large amount of image data needs to be transferred between the main memory 53, the GPU 62, the image decoder 64, the decoder 82, and the like at high speed when reading a program, displaying or drawing an image.
[0060]
Therefore, in this video game apparatus, data is directly transferred between the main memory 53, the GPU 62, the image decoder 64, the decoder 82, and the like by the control from the peripheral device control unit 52 without using the CPU 51 as described above. So-called DMA transfer can be performed.
[0061]
Thus, the load on the CPU 51 due to data transfer can be reduced, and high-speed data transfer can be performed.
[0062]
In this video game apparatus, when the power is turned on, the CPU 51 executes the operating system stored in the ROM 54.
[0063]
By executing the operating system, the CPU 51 controls the graphic system 60, the sound system 70, and the like.
[0064]
When the operating system is executed, the CPU 51 initializes the entire apparatus such as operation check, and then controls the optical disk control unit 80 to execute a program such as a game recorded on the optical disk. To do.
[0065]
By executing the program such as this game, the CPU 51 controls the graphic system 60, the sound system 70, etc. according to the input from the user,
It controls the display of images, the generation of sound effects, musical sounds, and the like.
[0066]
By the way, this video game apparatus includes a sound source that generates sound such as sound effects and a sound source control unit that controls the sound sources in order to generate musical sounds, sound effects, and the like in accordance with the progress of the game or user operation. I have.
[0067]
This sound source is realized by the CPU 51 and the SPU 71, and the sound source control unit is realized by the CPU 51.
[0068]
Specifically, as shown in FIG. 2, the SPU 71 reads waveform data recorded in the sound buffer 72 in response to an instruction from the CPU 51, and a pitch conversion unit 111 that converts the pitch of the read waveform data. A clock generator 112 for generating a clock, a noise generator 113 for generating noise based on the output of the clock generator 112, a switch 114 for switching outputs of the pitch converter 111 and the noise generator 113, and an output of the switch 114 The envelope generator 115 that changes the amplitude of the output waveform and converts the envelope of the generated sound (envelope), the mute processing unit 116 that switches whether or not to generate sound, the volume and the left and right Left and right volume adjustments for channel balance Arm 117L, it is equipped with a 117R.
[0069]
The sound buffer 72 stores several pieces of waveform data for one cycle constituting a sound that is sounded in advance. This waveform data is stored as the above-mentioned 4-bit ADPCM data, and is converted into 16-bit PCM data by the SPU 71 at the time of reading, and then supplied to the pitch converter 111.
[0070]
For this reason, compared with the case where the PCM data is stored as it is, the area in the sound buffer 72 required for storing the waveform data can be reduced, and more waveform data can be stored.
[0071]
The main memory 53 stores sound envelopes corresponding to one cycle of waveform data stored in the sound buffer 72 in advance, that is, information such as the rise and fall of the sound.
[0072]
Although FIG. 2 shows a circuit configuration for one voice (one voice), this sound source includes pitch converters 111 to 117L and 117R for a total of 24 voices. The outputs of the volumes 117L and 117R are combined and output as audio outputs for two left and right channels.
[0073]
That is, this sound source can simultaneously generate 24 voices.
[0074]
For each voice, the waveform data, envelope, volume, left / right channel balance, etc. stored in the sound buffer 72 can be set independently.
[0075]
As a result, the sound source can generate chords or perform with a plurality of musical instruments using a plurality of voices.
[0076]
In addition, this sound source can perform so-called reverberation processing for synthesizing a sound output with a sound output that has been shifted in time.
[0077]
That is, the SPU 71 includes switches 118L and 118R that select whether or not to perform reverberation processing on the sound output obtained by synthesizing the sounds of 24 voices, and the reverb that moves the sound output supplied from the switch 118L back and forth in time. A processing unit 119, a volume 120 that adjusts the volume of the audio output that has been moved back and forth in time, an adder 121b that synthesizes the output of the volume 120 with the audio output before being moved back and forth in time, And a master volume 122 for adjusting the output volume.
[0078]
In addition, this sound source can synthesize an audio signal read from the optical disk supplied from the decoder 82 with the audio output generated as described above.
[0079]
Specifically, the SPU 71 selects a switch 123 for selecting whether or not to synthesize an audio signal from the optical disk into the above-described audio output, and mixes the volume of the audio signal to be synthesized to be supplied to the adding unit 121a. A volume 124 and a switch 125 for selecting whether to perform reverberation processing on the audio signal to be synthesized are provided.
[0080]
In FIG. 2, the configuration of the reverberation processing unit 119, the volume 120, the mixing volume 124, etc. is shown only for the left channel, but these also have the same configuration for the right channel.
[0081]
Here, the operation of this sound source will be described.
[0082]
The CPU 51 supplies a selection signal for selecting the waveform data to be generated from the waveform data stored in the sound buffer 72 and the pitch of the sound to be generated to the pitch converter 111 when it is necessary to generate the sound. At the same time, an envelope corresponding to the waveform data to be generated is read from the envelope stored in the main memory 53 and supplied to the envelope generator 115.
[0083]
The pitch conversion unit 111 reads the waveform data by changing the waveform data reading step according to the instructed pitch. In addition, when the reading of the waveform data for one cycle is completed, the pitch conversion unit 111 repeatedly reads the same waveform data from the beginning during the period in which the sound generation instruction is supplied.
[0084]
Thereby, while the sound generation instruction is supplied, the waveform data corresponding to the instructed pitch is reproduced. Such waveform data is supplied to the envelope generator 115 via the switch 114.
[0085]
The envelope generator 115 converts the amplitude of the waveform data from the pitch converter 111 based on the envelope supplied from the CPU 51.
[0086]
As a result, voice for one voice is generated. Similarly, the remaining 23 voices are generated, and the volume and balance of the left and right channels are adjusted by the respective volumes 117L and 117R, and then subjected to processing such as reverb processing as described above, and then synthesized. The
[0087]
Thus, a sound corresponding to the instruction from the CPU 51 is generated.
[0088]
The sound source control unit that controls the sound source is realized by the CPU 51 executing the sound source control program.
[0089]
In this video game apparatus, musical score data in which music information such as sound effects to be generated, waveform data used for background music (BGM), pitches of generated sounds, pronunciation, mute, timbre effects, etc. are arranged in time order along with time information. The sound source control unit stores in advance in the main memory 53, the sound source control unit sequentially reads out the musical score data, for example, at regular time intervals, and sequentially sets the pitch, sound generation and mute registers of the sound source, thereby creating sound effects, BGM. Etc. to play.
[0090]
Specifically, this musical score data is a single musical score data made into one file for each musical score data of a unit to be played (sequence) or connected musical score data in which musical score data of a plurality of sequences is made into one file. Consists of.
[0091]
For example, as shown in FIG. 3, the single musical score data includes one file header information and one sequence of musical score data, and one sequence of musical score data is one piece of data representing the attribute of the musical score data. It consists of header information and one sequence data.
[0092]
The file header information includes a sound ID indicating that the file is sound data and a version number indicating a version and the like.
[0093]
The data header information includes the time resolution of the sequence information of the musical score data, the resolution of a quarter note indicating the tempo and the time signature, the tempo of the music, and the time signature.
[0094]
The sequence data is composed of musical tone data constituting musical tone in one sequence.
[0095]
Further, for example, as shown in FIG. 4, the connected musical score data includes one file header information and musical score data of a plurality of sequences, and the musical score data of each sequence includes the single musical score data and the above-described single musical score data, respectively. Similarly, it consists of one data header information representing the attribute of the musical score data and one sequence data.
[0096]
In the case of this connected musical score data, the data header information includes a musical score data ID for identifying individual musical score data in the connected musical score data, and a quarter note indicating the time resolution, tempo, and time signature of the sequence information of the musical score data. Resolution, song tempo, and time signature.
[0097]
In addition, the music data of the single musical score data and the linked musical score data is changed in the key-on for instructing the sound of a certain voice, the key-off instructing the muting of a certain voice, and the pitch of a certain voice as shown in FIG. It consists of data such as change of pitch attribute to be performed. These data are interpreted by the CPU 51, and the sound source is controlled by the CPU 51 as described above.
[0098]
Single musical score data as described above and Linking The musical score data is composed of musical score data formed for each sequence, for example, as shown in FIG.
[0099]
That is, for example, the above-mentioned file header information is added to the musical score data A and B, respectively, to constitute single musical score data. In addition, musical score data C, D, and E are combined with musical score data IDs P-1, P-2, and P-3, respectively, and further file header information is added to form linked musical score data P. . At this time, the musical score data ID is in the joining order in the connected musical score data P.
[0100]
Single musical score data formed in this way and Linking The musical score data is recorded on an optical disk or the like, and is read out to the main memory 53 prior to reproduction.
[0101]
Such single musical score data and Linking The musical score data is reproduced by a sound source control unit realized by a sound source control program executed by the CPU 51.
[0102]
This sound source drive unit has, for example, the configuration shown in FIG. Linking Play music data and control the sound source.
[0103]
That is, the sound source control unit includes a single musical score data stored in the musical score data holding unit 53a of the main memory 53 and the controller 104 including the controller 92 or the like. Linking A musical score data selection unit 105 for selecting musical score data to be reproduced from musical score data, a musical score data acquisition unit 106 for acquiring musical score data selected by the musical score data selection unit 105, and a sound source including the sound system 70 and the like are controlled. A pronunciation / mute information control unit 107 is provided.
[0104]
The musical score data selection unit 105 further includes a musical score data selection information management unit 105a that manages selection information of musical score data selected in response to an input from the input device 104, and a musical score data selection that maintains the status of musical score data. An information holding unit 105b and a musical score data selection information control unit 105c for analyzing the status of the musical score data held in the musical score data selection information holding unit 105b.
[0105]
Here, as shown in FIG. 8, for example, the single musical score data A and B and the connected musical score data P are deleted from the file header information and are independently held in the musical score data holding unit 53a.
[0106]
In these single musical score data A and B, as musical score ID which identifies each “4”, “5” Are assigned and their addresses are managed according to the musical score ID.
[0107]
In addition, each musical score data C, D, E of the linked musical score data P has a musical score ID for identifying each “1”, “2”, “3” Are assigned and their addresses are managed according to the musical score ID.
[0108]
Specifically, for example, as shown in FIG. 9A, the main memory 53 stores a musical score data ID, an address where musical score data is stored, a pointer, and the like as a reference table for these musical score IDs. Yes.
[0109]
This reference table holds addresses ADDR1 and ADDR2 and pointers pt4 and pt5 in which the music score data A and B are stored in association with the music score IDs 4 and 5 for the single music score data A and B, for example.
[0110]
Further, in this reference table, for example, P-1, which is a musical score data ID of musical score data C, D, E, corresponding to musical score IDs 1, 2, 3 for musical score data C, D, E of the connected musical score data P, P-2 and P-3 and pointers pt1, pt2, and pt3 are stored.
[0111]
These musical score data IDs Composed of For the code P, the concatenation corresponding to the code P is stored in the main memory 53, for example, as shown in FIG. Musical score A start address SADDR1 in which data P is recorded is stored as a start address reference table.
[0112]
Further, for the musical score data IDs P-1, P-2, and P-3, the start to the start address SADDR1 of the linked musical score data P is stored in the main memory 53, for example, as shown in FIG. An address (offset address) is stored as an offset reference table.
[0113]
Specifically, the offset address corresponding to the musical score data ID P-1 is 0 because the corresponding musical score data C is the first musical score data of the linked musical score data, and the musical score data ID P-2 is changed to P-2. The corresponding offset address is the start address OADDR1 corresponding to the start address SADDR1 of the corresponding musical score data D, and the offset address corresponding to the musical score data ID P-3 is the start address OADDR2 corresponding to the start address SADDR1 of the corresponding musical score data E Become.
[0114]
That is, the musical score data constituting the linked musical score data is read out only by specifying the musical score ID by referring to the reference table, the start address reference table, and the offset reference table.
[0115]
As a result, the musical score data constituting the linked musical score data can be read out only by designating the musical score ID, as shown in FIG. 10, for example. Becomes easy.
[0116]
By the way, this sound source control unit can perform the reproduction processing of a plurality of musical score data by assigning 24 voices of the above-mentioned sound source to the reproduction processing of each musical score data.
[0117]
The progress of the reproduction processing of the plurality of musical score data is controlled in accordance with the pointer on the reference table corresponding to the musical score data reproduced in each processing. That is, this pointer indicates the position at which each musical score data is currently reproduced. When reproduction is not started, the pointer indicates the beginning of the musical score data.
[0118]
In addition, the musical score data holding unit 105b holds, as shown in FIG. 11, for example, a musical score data reproduction state for a musical score ID as a musical score data selection information attribute table.
[0119]
The reproduction state of the musical score data is set by an input from the above-described input device 104 or an instruction from another program such as a game progress.
[0120]
Further, the reproduction state of the musical score data is, for example, “Stop” when reproduction is not started, “Play” when reproduction is in progress, and “Pause” when reproduction is paused.
[0121]
That is, in the musical score data selection information attribute table shown in FIG. 11 described above, the musical score data whose musical score ID is 1 is being reproduced, the musical score data whose musical score ID is 2 has not been reproduced, and the musical score ID is 3 The musical score data with a musical score ID of 4 is being played back, and the musical score data with a musical score ID of 5 is not started.
[0122]
Here, the reproduction operation of musical score data by this reproduction apparatus will be described with reference to the flowchart shown in FIG.
[0123]
First, when the reproduction of the musical score data is started, the process proceeds to step S1. In step S1, the musical score data selection information management unit 105a checks whether there is an input from the input device 104, and if there is an input, the step Proceed to S2, and if there is no input, proceed to Step S6.
[0124]
In step S2, the musical score data selection information control unit 105c determines whether or not the input is a reproduction request for the instructed musical score ID. If it is not a reproduction request, the process proceeds to step S4. Proceeding to step S3, the musical score data corresponding to the musical score ID instructed by the musical score data selection information holding unit 105b is set to Play, and the process proceeds to step S6.
[0125]
In step S4, the score data selection information control unit 105c determines whether or not the input is a stop request for the instructed score ID. If not, the process proceeds to step S6. Proceeding to step S5, the musical score data corresponding to the musical score ID instructed by the musical score data selection information holding unit 105b is set to Stop, and the process proceeds to step S6.
[0126]
In step S6, the musical score data selection information control unit 105c analyzes the state of the musical score data corresponding to each musical score ID held in the musical score data selection information holding unit 105b, and in the subsequent step S7, the reproduction state is set. It is determined whether or not there is a musical score ID. If there is no musical score ID that is in a reproduction state, the process returns to step S1 to wait for input. In step S7, if there is a musical score ID in the reproduction state, the sound generation processing of each musical score data corresponding to the musical score ID in the reproduction state is started, and the process proceeds to step S8.
[0127]
The processing after step S8 is performed for each musical score data in accordance with a timer interrupt generated at regular intervals by the peripheral device control unit 52. In the following description, only one musical score data will be described.
[0128]
That is, in this step S8, the musical score data acquisition unit 106 instructs the musical score data holding unit 53a to read the musical score data corresponding to the musical score ID in the reproduction state.
[0129]
In step S9, the musical score data acquisition unit 106 determines whether or not the musical score data has been completed. If the musical score data has been completed, the sound generation process is terminated. If the musical score data has not been completed, the musical score data acquisition unit 106 continues. Proceed to S10.
[0130]
In step S10, the musical score data acquisition unit 106 determines whether the musical score data read in step S9 is data to be reproduced during the current interruption period, and is data reproduced during the current interruption period. If not, the sound generation process is terminated, and if the data is to be reproduced during the current interruption period, the process proceeds to step S11.
[0131]
In step S11, the sound / mute information control unit 107 determines whether or not the data reproduced during the current interruption period is a key-on for instructing the sound of a certain voice. If not, the process proceeds to step S13. If the key is on, the process proceeds to the next step S12, where the sound source is instructed to sound the designated voice, and then the process returns to step S8 to wait for the next interruption.
[0132]
In step S13, the sound production / mute information control unit 107 determines whether or not the data reproduced during the current interruption period is a key-off instructing to mute a certain voice. If not, the process returns to step S8. Wait for the next interrupt. If the key is off, the process proceeds to the next step S14, where the sound source is instructed to mute the designated voice, and then the process returns to step S8 to wait for the next interruption.
[0133]
Thereby, according to the above-mentioned musical score data selection information attribute table, musical score data corresponding to the musical score ID whose reproduction is selected is reproduced.
[0134]
Further, in this sound source control unit, it is possible to specify music score data only by designating a music score ID by referring to the above-described reference table and the like, and music score data can be easily managed.
[0135]
By changing the musical score data selection information attribute table, the musical score data playback state for each musical score ID can be set independently, so that the musical score data can be instructed to be played regardless of the playback status of other musical score data. For example, the response time to an input from a user or a request from another program can be improved.
[0136]
Incidentally, the sound source control unit shown in FIG. 7 has a configuration shown in FIG. 13, for example. FIG. 13 is an equivalent block diagram showing processing performed by the CPU 51 by executing an operating system, a sound source control program, a game program, and the like.
[0137]
The sound source control unit is activated at predetermined time intervals by a timer interrupt control unit 130 that controls the peripheral device control unit 52 to generate a timer interrupt to the CPU 51 every predetermined time, and a timer interrupt from the peripheral device control unit 52. A sound control unit 140 that controls the sound source based on the musical score data, a system load information control unit 150 that checks the load state of the entire video game device and supplies the load state to the timer interrupt control unit 130, and the controller 92 And an input request control unit 160 for checking the state.
[0138]
Further, the CPU 51 executes the operating system and the game program at the same time as the processing of the sound control unit 140. The drawing control unit 170 that controls the drawing by the graphic system 60 and the input from the user. The main routine unit 180 performs processing such as selection of sound effects and musical sounds generated, selection of images to be displayed, and control of game progress.
[0139]
The timer interrupt control unit 130 controls the switching between the timer interrupt interval holding unit 131, the timer interrupt management unit 132, the sound control unit 140, and the main routine unit 180 that hold intervals for generating timer interrupts. And a switching management unit 133.
[0140]
The sound control unit 140 includes a musical score data holding unit 141 that holds the above musical score data, a data acquisition management unit 142 that manages reading of musical score data, and a time information management unit 143 that controls the operation of the data acquisition management unit 142. And a sound generation / mute information control unit 144 for controlling the sound generation / mute of the sound source based on the read musical score data, and an internal resolution corresponding to the timer interrupt interval from the timer interrupt interval holding unit 131. The internal resolution holding unit 145 includes the above-described sound source.
[0141]
The sound source is composed of the above-described SPU 71, sound buffer 72, and the like, and generates sound by reading out the waveform data stored in the waveform data holding unit 146 comprising the sound buffer 72 under the control of the sound production / mute information control unit 144. A sound generation unit 147 for amplifying, and an amplification unit 148 for amplifying the generated sound to adjust the volume and the like. The sound generation unit 147 and the amplification unit 148 are realized as one function of the SPU 71 as described above.
[0142]
The system load information control unit 150 includes a system load information acquisition unit 151 that acquires system load information, a system load determination unit 152 that determines a system load, and a system load threshold value holding unit that holds a system load threshold value 153.
[0143]
The input request control unit 160 includes an input device 161 including the above-described controller 92 and the like, and an input request analysis unit 162 that analyzes an input request from the input device 161.
[0144]
The drawing control unit 170 includes the CPU 51, GTE 61, GPU 62, frame buffer 63, and the like, and includes a control-time drawing information holding unit 171 including the GTE 61, a drawing information control unit 172 including the CPU 51, and the GPU 62. A drawing information holding unit 174 including a frame buffer 63, a display device 175 for displaying an image based on a video output from the drawing device 173, and the like.
[0145]
Hereinafter, the operation of the sound source control unit will be described.
[0146]
In this sound source control unit, a timer interrupt interval corresponding to a system load or an input request is held in the timer interrupt interval holding unit 131 in advance. Specifically, for example, 1/240 seconds as a timer interrupt interval when the system load is light, and 1/60 seconds as a timer interrupt interval when the system load is heavy, which is longer than the timer interrupt interval when the system load is light Is held.
[0147]
In the sound source control unit, when the process is started, the main routine unit 180 executed by the CPU 51 controls the drawing control unit 170 according to the input from the input device 161, the musical sound generated by the sound control unit 140, and the like. The selection, system load information control unit 150 and the like are executed in parallel.
[0148]
At this time, the system load information acquisition unit 151 acquires the load information of the CPU 51 and supplies the load information to the system load determination unit 152. The system load determination unit 152 is stored in the system load threshold holding unit 153. The system load is determined by comparing with the value, and the determination result is supplied to the timer interrupt interval holding unit 131.
[0149]
The timer interrupt interval holding unit 131 selects a timer interrupt interval based on the system load determination from the system load determining unit 152 or the output of the input request analyzing unit 162 and supplies the timer interrupt interval to the timer interrupt managing unit 132 and the internal resolution holding unit 145. To do.
[0150]
Specifically, based on the determination result from the system load determination unit 152, the timer interrupt interval holding unit 131 sets the interrupt interval to 1/240 second when the system load is light, and when the system load is heavy, The interrupt interval is 1/60 second.
[0151]
The timer interrupt management unit 132 controls the peripheral device control unit 52 based on the timer interrupt interval supplied from the timer interrupt interval holding unit 131 and generates a timer interrupt at regular intervals. The control switching management unit 133 Based on the interrupt, the processing of the main routine unit 180 and the sound control unit 140 is switched at regular intervals, and the processing of the sound control unit 140 is started.
[0152]
When the process is started by the switching of the control switching management unit 133, in the sound control unit 140, the time information management unit 143 acquires data according to the internal resolution held in the internal resolution holding unit 145, that is, the timer interrupt interval. The management unit 142 is controlled to instruct reading of the timer interrupt interval from the musical score data held in the musical score data holding unit 141, and the read musical score data is supplied to the pronunciation / mute information control unit 144.
[0153]
The sound generation / mute information control unit 144 controls the sound generation unit 147 based on the musical score data supplied from the time information management unit 143. As a result, the sound generation unit 147 generates a sound based on the waveform data held in the waveform data holding unit 146.
[0154]
Specifically, by the execution of the sound generation / mute information control unit 144, the CPU 51 controls the generation of sound by controlling the pitch conversion unit 111, the envelope generator 115, and the like, as described above. The sound generated in this way is output by the speaker 73 after the level is adjusted by the amplifying unit 148.
[0155]
As a result, audio data based on the musical score data for the timer interrupt interval supplied from the timer interrupt interval holding unit 131 is output.
[0156]
The sound control unit 140 is activated at each timer interrupt interval set by the timer interrupt interval holding unit 131 as described above, and thereby sounds based on the musical score data for the timer interrupt interval are sequentially generated.
[0157]
That is, when the timer interruption interval is 1/240 second, the musical score data is reproduced every 1/240 second as shown in FIG. 14A, for example.
[0158]
At this time, the actual processing time of the sound processing unit 140 is shorter than 1/240 second.
[0159]
For example, two notes are reproduced from time t11 to time t12, from time t12 to time t13, from time t12 to time t14, and from time t14 to time t15. That is, two notes are reproduced in 1/60 second from time t11 to time t15.
[0160]
When the timer interruption interval is 1/60 second, the musical score data is reproduced every 1/60 second as shown in FIG. 14B, for example. For example, eight notes are reproduced in 1/60 second from time t21 to time t22.
[0161]
That is, eight notes are reproduced in 1/60 second as in the case where the timer interruption interval is set to 1/240 second.
[0162]
As a result, even if the timer interrupt interval is changed using the same musical score data, the sound source processing device controls the reading of the musical score data in accordance with the changed timer interrupt interval, so that the predetermined musical tempo is used. Music score data is played back.
[0163]
As described above, when the sound control unit 140 is activated and processed by interruption, the actual processing load of the CPU 51 is, for example, as shown in FIG. 15A when the timer interruption interval is 1/240 second. Thus, the processing of the sound control unit 140 accounts for 25% of the processing capacity of the CPU 51. When the timer interrupt interval is 1/60 second, for example, as shown in FIG. 15B, the processing of the sound control unit 140 occupies 12.5% of the processing capacity of the CPU 51.
[0164]
That is, the load on the CPU 51 for actually controlling the sound source does not change much even when the timer interrupt interval is shortened. However, when the timer interrupt interval is shortened, if timer interrupts occur frequently, the processing overhead for timer interrupts Increases, the processing load of the sound control unit 140 increases.
[0165]
As described above, in the sound source control unit, the timer interrupt interval selected by the timer interrupt interval holding unit 131 is 240 minutes when the processing load of the sound control unit 140 is relatively large when the system load is light. When the system load is heavy, the processing load of the sound control unit 140 is relatively reduced to 1 / 60th of a second.
[0166]
Thereby, in this sound source control device, the processing load of the sound control unit 140 can be varied according to the system load without changing any musical score data. For this reason, when the system load is heavy, the processing load of the sound control unit 140 is reduced, and for example, drawing and the like can be performed smoothly.
[0167]
In the above embodiment, the example of applying the sound source control information storage method and the sound source control device of the present invention to the sound source control unit for controlling the sound source in the video game device has been described. However, the sound source control information for controlling the sound source is described. Can be applied to devices such as an automatic performance device and a personal computer as long as the sound source is controlled based on the storage method or the sound source control information. Of course, it can be changed as long as it does not deviate from the above.
[0168]
【The invention's effect】
The sound source control information storage method according to the present invention stores identification information assigned to each piece of musical score data constituting the connected musical score data and correspondence information indicating the correspondence between the head address and the relative address.
[0169]
Thus, by referring to the correspondence information, it is possible to specify the address where the corresponding musical score data is stored simply by specifying the identification information, and it is possible to store the sound source control information that facilitates the management of the musical score data. .
[0170]
In addition, the sound source control device according to the present invention only selects the musical score identification information,
The correspondence information is referred to, and the musical score data corresponding to the selected musical score identification information is read out.
[0171]
Thereby, it is possible to easily read the musical score data stored as the linked musical score data by connecting the musical score data.
[0172]
In addition, the sound source control device according to the present invention can set the reproduction state independently for the musical score data corresponding to the plurality of identification information, and immediately before the reproduction of certain musical score data, In addition, the reproduction of other musical score data can be started, and the response to the input can be speeded up.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a video game device to which a sound source control device according to the present invention is applied.
FIG. 2 is a block diagram showing a specific configuration of an SPU that constitutes the video game apparatus.
FIG. 3 is a diagram showing a format of musical score data for controlling sound sources constituting the video game apparatus.
FIG. 4 is a diagram showing a format of musical score data for controlling sound sources constituting the video game apparatus.
FIG. 5 is a diagram showing a format of music data constituting the musical score data.
FIG. 6 is a diagram for explaining the formation of the musical score data.
FIG. 7 is a diagram illustrating a configuration of a sound source control unit that controls the sound source based on the musical score data.
FIG. 8 is a diagram showing a state of musical score data held in a musical score data holding unit constituting the sound source control unit.
FIG. 9 is a diagram showing the structure of a reference table that is referred to when reading the musical score data.
FIG. 10 is a diagram for explaining a musical score data reproduction operation by the sound source control unit;
FIG. 11 is a diagram for explaining management of musical score data by the sound source control unit.
FIG. 12 is a flowchart for explaining a musical score data reproduction operation by the sound source control unit;
FIG. 13 is a block diagram illustrating a detailed configuration of the sound source control unit.
FIG. 14 is a diagram for describing processing performed by a timer interrupt by a sound control unit constituting the sound source control unit.
FIG. 15 is a diagram illustrating a ratio between the processing of the sound control unit and the load of other processing.
FIG. 16 is a block diagram showing a configuration of a conventional sound source control device.
FIG. 17 is a diagram showing a format of musical score data used in a conventional sound source control device.
[Explanation of symbols]
50 Control system
51 CPU
52 Peripheral device controller
53 Main memory
53a Music score data holding part
54 ROM
60 graphics system
61 GTE
62 GPU
63 Frame buffer
64 image decoder
65 Display device
70 Sound system
71 SPU
72 Sound Buffer
73 Speaker
80 Optical disk controller
81 Optical disk device
82 Decoder
83 buffers
90 Communication control unit
91 Communication controller
92 Controller
100 buses
104 Input device
105 Musical data selection part
105a Music score data selection information management unit
105b Music score data selection information holding unit
105c Musical score data selection information control unit
106 Music score data acquisition unit
107 Pronunciation / mute information control unit
111 Pitch converter
112 clock generator
113 Noise generator
114, 118L, 118R, 123, 125 switches
115 Envelope Generator
116 Mute processing section
117L, 117R, 120, 124 volumes
119 Reverb processing unit
121a, 121b adder
122 Master volume
124 mixing volume
140 Sound controller
141 Music data storage
142 Data Acquisition Manager
143 Time Information Management Department
144 Pronunciation / mute information control unit
145 Internal resolution holding unit 145
150 System load information control unit
151 System load information acquisition unit
152 System Load Judgment Unit
153 System load threshold value holding unit
160 Input request control unit
161 Input device
162 Input request analysis
170 Drawing controller
171 Drawing information storage unit during control
172 Drawing information control unit
173 Drawing device
174 Drawing information holding unit
175 Display device

Claims (4)

  The connected musical score data is read out from a recording medium in which connected musical score data is formed by connecting a plurality of musical score data IDs for identifying musical score data to musical score data composed of sound source control information, and a memory A sound source control device for storing
  A musical score ID is assigned to each musical score data ID, and stored in the memory as a reference table.
  An address indicating the storage location of the linked musical score data in the memory is stored in the memory as a start address reference table,
  A sound source control apparatus, comprising: an address management unit that stores, in each memory score, an address in the linked musical score data of the corresponding musical score data in the memory as an offset reference table.   The sound source control device according to claim 1,
  When the designation of the musical score ID corresponding to the musical score data to be reproduced is accepted,
  Identify the corresponding musical score data ID based on the reference table,
  Based on the start address reference table and the offset reference table, a reading means for calculating a start address of the music score data corresponding to the specified music score data ID and reading out the music score data stored at the calculated start address; A sound source control apparatus further comprising:   The connected musical score data is read out from a recording medium in which connected musical score data is formed by connecting a plurality of musical score data IDs for identifying musical score data to musical score data composed of sound source control information, and a memory A sound source control method in a sound source control device for storing
  Assigning a musical score ID to each musical score data ID and storing it in the memory as a reference table;
  Storing an address indicating a storage location of the linked score data in the memory as a start address reference table in the memory;
  A sound source control method comprising: storing, for each score data ID, an address in the linked score data of the corresponding score data in the memory as an offset reference table.   A sound source control method in the sound source control device according to claim 3,
  A step of accepting designation of a musical score ID corresponding to musical score data to be reproduced;
  Identify the corresponding musical score data ID based on the reference table,
  Based on the start address reference table and the offset reference table, a start address of the score data corresponding to the specified score data ID is calculated, and a reading step of reading the score data stored at the calculated start address is performed. A sound source control method, further comprising:

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