JPH0633519Y2 - Sound generator for TV games - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a sound generation circuit for a TV game, and more particularly to a sound generation circuit for a TV game that generates a vibrato sound using a sound source circuit for a synthesizer.

[Prior Art] Various synthesizer sound source circuits have been well known,
Since it is possible to easily synthesize and output arbitrary waveforms as needed, it is widely used in a voice generator of various electronic musical instruments.

Usually, the sound generator built into an electronic musical instrument often has a built-in LFO circuit in order to produce a vibrato effect on the output sound, and activates the LFO circuit as necessary.
It is formed so that an audio signal with vibrato can be output from the synthesizer sound source circuit.

Therefore, if such a sound generating device for an electronic musical instrument is used as a sound generating device for a TV game and vibrato can be applied to the output sound, the sounds of various standard bodies appearing in the TV game (for example, in an invader game) Sounds such as the disks and missiles that appear), sound effects that change from screen to screen, and the like can be given a transition of sound that is peculiar to it, and the sound effects of the game itself can be enhanced.

[Problems to be solved by the invention] By the way, many standard sounds and sound effects are used in video games. Therefore, it is necessary to set a vibrato pattern peculiar to each of these body sounds, and it is also necessary to set a vibrato pattern peculiar to a sound effect that changes for each game screen. Therefore, the sound generation device used for such a video game is required to arbitrarily synthesize and output a large number of vibrato sounds having different patterns as needed.

However, electronic musical instruments do not require that many vibrato patterns, and commercially available musical instruments are typically only capable of producing 3-4 types of patterned vibrato tones.

Therefore, the voice generating device for an electronic musical instrument cannot be used at all for a video game that requires a large number of vibrato sounds of different patterns, and therefore effective measures are required.

Further, a sound source circuit for a synthesizer used in a voice generator for an electronic musical instrument has a plurality of sound source units built therein, and in particular, an FM sound source circuit usually has eight sound source units built therein.

However, since the performer has a limited musical instrument operation ability, the voice generator of the electronic musical instrument performs the same LFO processing on the eight sound source units built in the FM sound source circuit. Therefore,
Only the same pattern of vibrato sound can be output from each sound source of the audio circuit.
Even when used in a TV game, it is not possible to simultaneously output different vibrato sounds corresponding to a plurality of body sounds and sound effects appearing on the game screen by utilizing each sound source section of the synthesizer sound source circuit. was there.

[Object of the Invention] The present invention has been made in view of such a conventional problem, and uses a sound source circuit for a synthesizer including a plurality of sound source units to simultaneously output a plurality of vibrato sounds corresponding to a game screen. An object of the present invention is to provide a sound generating device for a TV game which can be played.

[Means for Solving the Problems] In order to achieve the above object, the present invention uses a sound source circuit for a synthesizer including a plurality of sound source units,
A device for synthesizing and outputting a plurality of voice signals for a game, including a basic key code designation signal representing the scale and amplitude of the voice,
LFO pattern designation signal corresponding to the basic key code signal, L
A game arithmetic circuit for arithmetically outputting for each sound according to a predetermined TV game program, a group of LFO signals including a speed parameter indicating an FO pattern output period, a scale and amplitude coefficient specifying signal, and the LFO signal An LFO that outputs the corresponding audio LFO pattern signal based on the group and the pitch and amplitude coefficients of the audio.
Circuit, the scale and amplitude of the voice designated by the basic key code designating signal output from the arithmetic circuit, LFO pattern signal output from the LFO circuit, LFO processing based on the pitch coefficient and amplitude coefficient, the A fundamental wave data generation circuit that sequentially and independently outputs pitch data representing the scale of the LFO-processed voice and amplifier data representing the amplitude to each sound source section of the synthesizer sound source circuit. Of multiple body sounds and sound effects that compose
Between the representative wave data memory that stores the representative point data group of the LFO pattern in advance and outputs the representative point data group of the corresponding LFO pattern according to the input LFO pattern designation signal, and each representative point of the output representative point data group A linear interpolation calculation based on the speed parameter, and an intermediate value calculation circuit that sequentially outputs the LFO pattern data obtained by the linear interpolation calculation as the LFO pattern signal at a predetermined timing, and a plurality of pitch coefficients for a scale and a plurality of pitch amplitudes. An amplitude coefficient is registered in advance, and a parameter generation circuit that outputs a pitch coefficient and an amplitude coefficient specified by the pitch and amplitude coefficient specification signal is included, and LFO processing is performed independently from each sound source unit of the synthesizer sound source circuit. It is characterized by outputting a vibrato audio signal for a game.

[Operation] Therefore, according to the present invention, a large number of vibrato sounds having different patterns can be synthesized and output according to the content of the game, and the sound effect of the TV game can be further enhanced.

Further, according to the present invention, different vibrato sounds can be combined and output from a plurality of sound source units provided in the synthesizer sound source circuit at substantially the same time, so that a large number of body sounds and sound effects corresponding to the game screen can be produced. Can be simultaneously synthesized and output as vibrato sounds of different patterns, and the sound effect of the game can be further enhanced.

It should be noted that the game vibrato sound signal output in the present invention may be not only a vibrato sound composed of sounds that repeatedly transit in the same pattern, but also a vibrato sound composed of sounds that slowly transit only once in a predetermined pattern.

[Embodiment] Next, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a preferred embodiment of a sound generating device for a TV game according to the present invention, in which an arithmetic circuit 10 includes a game program previously registered in a program memory 12 and a play signal inputted by a player. Based on the above, a basic key code designating signal 100 representing various objects or sound effects corresponding to the game screen is output to the operator and the fundamental wave data generating circuit 14.

In the embodiment, the basic key code designation signal 100 includes tone color data, scale data, and amplitude data.

Here, the tone color data is used to specify the type of sound such as the flight sound of a spaceship or the dropping sound of a bomb. In addition, the scale data is the octave designation and any of the 12 notes in the octave: do → do # → le → le # → mi → fa → fa # → so → so # → la → la # → si. The scale is specified. In addition, the amplitude data specifies the basic loudness of the specified scale.

Then, the fundamental wave data generation circuit 14 outputs the pitch data 200 for voice synthesis, the amplifier data 210 and the tone color parameter 220 to the voice circuit 16 for synthesizer based on the basic key code designation signal 100 input in this way. To do.

The synthesizer sound source circuit 16 includes a plurality of sound source units, synthesizes an audio signal 300 specified by a set of input signals 200, 210 and 210 using a predetermined sound source unit, and synthesizes the sound signal 300 into a speaker 24 via an amplifier 22. To output.

As such a synthesizer tone generator circuit 16, an FM tone generator circuit, a VCO circuit, a DCO circuit, or the like may be used as necessary. In the embodiment, the FM tone generator circuit is used.

FIG. 2 shows the configuration of the FM sound source circuit 16 used in this embodiment. The sound circuit 16 of the embodiment has a total of eight FM sound source sections 18-1, ... 18-8 built therein. There is.

In the embodiment, each FM sound source section 18 includes a total of four sine tables 20-1, 20-2 ... 20-4 as shown in FIG.
By connecting these sign tables 20-1, 20-2, ... 20-4 according to a predetermined algorithm, and further by applying a predetermined feedback as necessary, an arbitrary timbre (for example, a flight sound of a spacecraft or Various sounds such as submarine sonar sounds) can be output synthetically.

In order to specify such a timbre, in the present embodiment, the timbre parameter 220 is output from the fundamental wave data generating circuit 14 to each sound source section 18 based on the timbre data included in the basic key code designating signal 100.

This timbre parameter 220 contains the signature tables 20-1, 2
Includes algorithm data and feedback data indicating the connection relationship of 0-2, ...
It includes data such as 20-1, 20-2, ... 20-4 frequency ratio, frequency sequence dune, envelope and keyboard scaling rate.

Therefore, according to this tone color parameter 220, for example, when the sign tables 20-1, 20-2, ... 20-4 are connected as shown in FIG. When the sine tables 20-1, 20-2, ... 20-4 are connected as shown in FIG. 4 (B), the sound of the big bell clock tower is synthesized and output as the audio signal 300. It

In addition, every time the scale and the volume of the voice signal 300 representing an arbitrary tone color are designated in this way, the fundamental wave data generation circuit 14 causes the scale data and the scale data included in the basic key code designation signal 100 to be as described above. Based on the amplitude data, pitch data 200 and amplifier data 210 are output to each sine table 20 of the sound source section 18.

By doing so, the sound source section 18 outputs the sound signal 300 having the tone color specified by the sound parameter 220 and having the scale and the loudness specified by the pitch data 200 and the amplifier data 210, respectively. Amplifier 22
Will be synthesized and output to the speaker 24 via.

By the way, the scale of the voice signal 300 output from each sound source unit 18 in this way is any scale from Do to Si included in the predetermined octave, and its amplitude is also the amplitude data of the basic key code designation signal 100. Is a reference amplitude specified by.

Therefore, in order to give vibrato to such an audio signal 300, the pitch data 200 input to the sound source section 18
Also, it is necessary to perform LFO processing on the amplifier data 210 according to a desired vibrato pattern.

Therefore, in the device of the present embodiment, a large number of LFOs corresponding to the sounds of various targets and various sound effects appearing on the game screen are displayed.
Data is registered in the program memory 12 in advance.

In the embodiment, the LFO data includes LFO pattern designation data for the basic key code, speed parameter data representing the cycle of the LFO pattern, pitch coefficient designation data and amp coefficient designation data for the pitch data 200 and the amp data 210. .

Then, as described above, the arithmetic circuit 10 calculates various targets and sound effects appearing on the game screen according to the input play signal and the game program. Then, the basic key code designation signal 100 is output to the fundamental wave data generation circuit 14, and the basic key code 100 is output from the memory 12.
Read a set of LFO data for
The signal group 400 is output to the LFO circuit 30.

In the present invention, the LFO circuit 30 includes a pattern wave data memory 32, an intermediate value calculation circuit 34, and a timing circuit 36.
And an LFO pattern signal 500 of the corresponding voice based on the input LFO signal group 400.
Then, the pitch coefficient 510 and the amplitude coefficient 520 of the scale are directed to the fundamental wave data generating circuit 14 and output.

In the embodiment, the pattern wave data memory 32,
A representative point data group of various LFO patterns used in the game is registered in advance and inputted, and an LFO pattern designation signal 410 is input.
The representative point data group 440 corresponding to is output to the intermediate value calculation circuit 34.

FIG. 5 shows a specific example of the representative point data group of the LFO pattern registered in advance in the pattern wave data memory 32. For example, the LFO pattern corresponding to the flight sound of the spacecraft is
It is registered as a representative point data group represented by 7 representative points of a, b, c, d, e, f, g, and the LFO pattern representing the dropping sound of the bomb is a, b, c. Is registered in advance as a representative point data group represented by the representative points.

Further, the intermediate value calculation circuit 34 performs linear interpolation calculation between the representative points of the representative point data group 440 output from the pattern wave data memory 32 based on the input speed parameter 420. Then, the calculated value is synchronized with the clock pulse 600 output from the timing circuit 36 and the fundamental wave data generation circuit 1
Output as LFO pattern signal 500 toward 4.

For example, when the representative point data group 440 representing the flight sound of the spacecraft shown in FIG. 5 and the speed parameter 420 of “64” are input to the intermediate value calculation circuit 34, the intermediate value calculation circuit 34
Linear interpolation calculation is performed between the representative points according to the speed parameter of "64", for example, 100,105,110,115 linear interpolation data is calculated in sections a to b, and 120,120,12 in sections b to c.
Calculates 0,120 linear interpolation data.

Then, the calculated data thus obtained are sequentially output as the LFO pattern signal 500 based on the clock pulse 600 repeatedly output from the timing circuit 36 at a constant cycle.

Therefore, when a total of 24 linear interpolation data are calculated in the section of the representative points a to g as in the embodiment, one cycle of the LFO of 24 pulses 600 is output from the timing circuit 36. The output of the pattern data 500 will be completed.

Here, taking the linear interpolation calculation of the sections a to b as an example, the increment Δab of each interpolation data is given by the following equation.

Δab = (ba) × (P / 256) where P represents a speed parameter.

Therefore, as is clear from FIG. 5, a = 100, b = 120, P
= 64, the increment is Δab = 5. As a result, the linear interpolation data obtained in the sections a to b have the values of 100, 105, 110, 115 as shown in FIG.

Then, when the number N of interpolation data obtained in the sections a to b satisfies the following expression, the calculation of the sections a to b ends, and the calculation of the next sections b to c starts.

(P / 256) × N ≧ 1 Therefore, in this embodiment, the intermediate value calculation circuit 34 increases the number of linear interpolation data to be calculated in the same section as the value of the input speed parameter 420 decreases. As a result, one cycle of LFO pattern signal 500
It will be appreciated that the time required to output is inversely proportional to the speed parameter.

Further, in the parameter generating circuit 38, a plurality of scale coefficients and amplitude coefficients are registered in advance. Then, the parameter generation circuit 38 outputs the scale coefficient 510 and the amplitude coefficient 520 corresponding to the above-mentioned LFO pattern signal 500 to the fundamental wave data generation circuit 14 based on the inputted scale and amplitude coefficient designation signal 430. .

Then, the fundamental wave data generation circuit 14 performs LFO processing on the scale and amplitude specified by the basic key code specifying signal 100 based on the LFO pattern signal 500, the scale coefficient 510 and the amplitude coefficient 520 thus input. , And outputs the pitch data 200 representing the scale and the amplifier data 210 representing the amplitude to the synthesizer tone generator circuit 16.

FIG. 6 shows a specific example of the pitch data 200 and the amplifier data 210 which are LFO processed and output from the fundamental wave data generation circuit 14.

For example, the LFO circuit 30 outputs the LFO pattern signal 500 representing the flight sound of the spacecraft as shown in FIG. 5, and the scale coefficient 510 of the LFO pattern signal 500 is "64" and the amplitude coefficient 520 is "0". Is assumed to be output, the LFO processed pitch data 200 and amplifier data 210 are output in the representative point sections ab as shown in FIG. 6 (A).

Here, “KEY” of the pitch data 200 represents a scale (basic output frequency) designated by the basic key code designation signal 100, and “cent” represents scale correction data subjected to LFO processing. This scale correction data indicates a value obtained by dividing a semitone into 100 equal parts, and when the value reaches 100cent, it means that the scale is raised by a semitone.

Further, “TL” of the amplifier data 210 represents the basic output level of the amplitude designated by the basic key code designation signal 100, and “dB” represents the LFO correction data for the amplitude.

In addition, L representing the dropping sound of the bomb shown in FIG. 5 from the LFO circuit 30.
When the FO pattern signal 500 is output and “128” and “100” are output as the scale coefficient 510 and the amplitude coefficient 520, the fundamental wave data generation circuit 14 outputs the LF as shown in FIG. 6 (B).
The O-processed pitch data 200 and amplifier data 210 are output.

In this embodiment, the output of the pitch data 200 and the amplifier data 210 is performed in synchronization with the clock pulse 600 output from the timing circuit 36.

As described above, according to the present invention, since each LFO pattern is registered in the pattern wave data memory 32 as the representative point data group 440 and the representative points are linearly interpolated to output the LFO pattern signal 500, A small memory area is required to register one LFO pattern, and a large number of LFO patterns can be registered in the pattern wave data memory 32.

Therefore, according to the present invention, in the pattern wave data memory 32 of the LFO circuit 30, the vibrato pattern peculiar to each object appearing in the video game and the vibrato pattern peculiar to the sound effect generated for each screen are stored in the LFO pattern. By registering as a representative point data group in advance, the synthesizer sound source circuit 16
It is possible to synthesize and output the sound of various objects and the sound effect of each screen by using as a sound signal 300 having a unique vibrato, and it is possible to enhance the sound effect of various TV games.

Further, in the present invention, the basic key code designating signal 100 and the LFO data signal group 400 of each specimen are sequentially output from the arithmetic circuit 10, and the fundamental wave generating circuit 14 is interlocked with this, as shown in FIG. , Each sound source section 18-1, 18-2, ... 18 of the sound source circuit 16
-8, a set of pitch data 200, amplifier data 210, and tone color parameter 220 are sequentially and independently output.

Therefore, each sound source section 18-1, 18- of the sound source circuit for the synthesizer is
From 2, ... 18-8, the vibrato audio signal 100 for the game, which has been LFO-processed independently, is sequentially output.

Especially from the fundamental wave generation circuit 14 to each sound source section 18-1, 18-2, ... 18-
Since the data output to 8 is switched in an extremely short time, the player's ears can simultaneously hear a plurality of vibrato sounds respectively output from the sound source units 18-1, 18-2, ... 18-8. .

Therefore, according to the present invention, even when a plurality of sounds must be simultaneously output corresponding to the game screen, this can be sufficiently dealt with, and the sound effect of the game can be further enhanced. .

In the present embodiment, each sound source section of the FM sound source circuit 16
Four sign tables 20-1, 20-2, ... 20-4 in 18-1
However, the present invention is not limited to this, and the sound source unit 18-1 can be formed using one to three or five or more sine tables.

Further, in the present embodiment, the same pitch data 20 for the sign tables 20-1, 20-2, ...
Although the case where 0 and the amplifier data 210 are supplied has been described as an example, the present invention is not limited to this, and the pitch data 200 and the amplifier data 2 that are supplied to each sine table 20 as necessary.
It is possible to set 10 to different values, and by doing so, it becomes possible for the sound source section 20 to output the audio signal 300 having a more specific vibrato pattern.

In addition, even when the same pitch data 200 is input to the plurality of sine tables 20 constituting each sound source unit 18, by independently controlling the frequency ratio of each sine table 20-1, 20-2, .... , It is possible to achieve the same effect as when different pitch data 200 is input for each table.

Further, in the above embodiment, the tone generator circuit for the synthesizer
Although the FM sound source circuit has been described as an example of 16, the present invention is not limited to this, and it is also possible to use a VCO circuit (voltage control oscillator) or a DCO circuit (digital control oscillator) as the sound source circuit.

When the VCO circuit is used as the tone generator circuit 16, a D / A converter is provided between the arithmetic circuit 10 and the LFO circuit 30 and the fundamental wave data generating circuit 14, and the fundamental wave data generating circuit 14 is provided.
It is necessary to perform digital / analog conversion on the basic key code designation signal 100, the LFO pattern signal 600, the scale coefficient 510 and the amplitude coefficient 520 which are input to the.

In the above embodiment, a plurality of sine tables 20-1, 20-2, ... 20-4 are provided in each sound source section 18 of the synthesizer sound source circuit 16.
However, the present invention is not limited to this, and it is sufficient to provide one sign table 20 if a time sharing method is used as is well known.
In this case, for example, one sine table is time-divided into four to be used to function as one sound source section, and this is further time-divided into eight to be used in total. It only has to function as eight sound source units.

[Effects of the Invention] As described above, according to the present invention, a sound source circuit for a synthesizer including a plurality of sound source units is used, and various patterns of game vibrato audio signals that are LFO processed independently from each sound source unit are generated. Since they can be output almost at the same time, it is possible to enhance the sound effect according to the game contents of various TV games.

In particular, according to the present invention, different vibrato sounds can be efficiently generated by using the speed parameter representing the LFO pattern output period and performing the linear interpolation calculation of the representative point data group of the LFO pattern.

Further, according to the present invention, a sound generator for a TV game can be formed using a commercially available sound source circuit for a synthesizer, so that the entire device can be made inexpensive.

[Brief description of drawings]

FIG. 1 is a block diagram showing a preferred embodiment of a sound generating device for a TV game according to the present invention, FIG. 2 is an explanatory diagram showing a concrete configuration of the fundamental wave data generating circuit shown in FIG. 1, and FIG. FIG. 4 is an explanatory diagram showing the configuration of each sound source section of the fundamental wave data generating circuit shown in FIG. 2, FIG. 4 is an explanatory diagram showing the connection relationship of each sign table constituting the sound source section shown in FIG. 3, and FIG. FIG. 6 is an explanatory diagram showing the operation of the LFO circuit shown in FIG. 1, FIG. 6 is an explanatory diagram of pitch data and amplifier data output from the data generation circuit, and FIG. 7 is fundamental wave data shown in FIG. It is explanatory drawing which shows the mutual relationship of a generation circuit and the sound source circuit for synthesizers. 10 ... Operation circuit 14 ... Fundamental wave data generation circuit 16 ... Synthesizer sound source circuit 18 ... Sound source section 20 ... Sign table 30 ... LFO circuit 32 ... Pattern wave data memory 34 ... Intermediate value calculation circuit 38 ... Parameter generation circuit 100 ... Basic key Code designation signal 200 ... Pitch data 210 ... Amplifier data 300 ... Voice signal 400 ... LFO data group

Claims (1)

[Scope of utility model registration request] 1. A device for synthesizing and outputting a plurality of audio signals for a video game using a synthesizer tone generator circuit including a plurality of tone generators, comprising: a basic key code designating signal representing a scale and amplitude of a voice;
LFO pattern designation signal corresponding to the basic key code signal, L
A game arithmetic circuit for arithmetically outputting for each sound according to a predetermined TV game program, a group of LFO signals including a speed parameter indicating an FO pattern output period, a scale and amplitude coefficient specifying signal, and the LFO signal An LFO that outputs the corresponding audio LFO pattern signal based on the group and the pitch and amplitude coefficients of the audio.
Circuit, the scale and amplitude of the voice designated by the basic key code designating signal output from the arithmetic circuit, LFO pattern signal output from the LFO circuit, LFO processing based on the pitch coefficient and amplitude coefficient, the A fundamental wave data generation circuit that sequentially and independently outputs pitch data representing the scale of the LFO-processed voice and amplifier data representing the amplitude to each sound source section of the synthesizer sound source circuit. Of multiple body sounds and sound effects that compose
Between the representative wave data memory that stores the representative point data group of the LFO pattern in advance and outputs the representative point data group of the corresponding LFO pattern according to the input LFO pattern designation signal, and each representative point of the output representative point data group A linear interpolation calculation based on the speed parameter, and an intermediate value calculation circuit that sequentially outputs the LFO pattern data obtained by the linear interpolation calculation as the LFO pattern signal at a predetermined timing; An amplitude coefficient is registered in advance, and a parameter generation circuit that outputs a pitch coefficient and an amplitude coefficient specified by the pitch and amplitude coefficient specification signal is included, and LFO processing is performed independently from each sound source unit of the synthesizer sound source circuit. Video game audio output characterized by outputting vibrato audio signals for Circuit.