JP2000194366A - Sound source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently impart an effect to a musical sound becoming one instrumental tone color with musical sound waveforms of plural parts. SOLUTION: The musical sound waveforms of plural parts are formed respectively by separate sound generation slots 31. One of plural sound generation slots 31 becomes a master sound generation slot, and the others become slave sound generation slots. Respective sound generation slots 31 are provided with musical sound forming parts WG. The musical sound waveforms formed by the slave sound generation slots of the musical sound forming parts WG are outputted to the master sound generation slot. The master sound generation slot combines the musical sound waveforms inputted from the slave sound generation slots with the musical sound waveform formed by itself to input the synthesized waveform to an effector. Thus, the effect is imparted to the perfect musical sound waveform, and since the operated effector is one, a processing load is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tone generator and a tone processing method for a tone generator capable of giving various effects to musical tones.

[0002]

Some of the musical tones generated by the tone generator produce a musical tone of one musical instrument by synthesizing a plurality of musical sound waveforms. Each musical tone waveform of this musical instrument timbre is formed by a different sounding slot. Since the tone generation slot is intended to generate a musical tone of one complete instrument tone, the tone generation slot includes a circuit portion such as an effector in addition to a circuit portion for forming a musical tone waveform.

However, if effects are separately applied to musical tone waveforms separately formed in each sounding slot and then synthesized to form a musical tone of one musical instrument tone, the effect differs from the original effect. However, there is a disadvantage that the processing is duplicated and the load on the apparatus is increased. For example,
In the case of an effect that distorts the waveform when the signal level, such as distortion, exceeds a certain value, the effect of the effect is also different because the level of the tone waveform is different between a different tone waveform and a synthesized tone waveform.

[0004] An external effector different from the effect inside the sound source device is mainly connected to the subsequent stage of the sound source device. This effector is an effector for giving an effect that mainly gives a sound a spaciousness, such as a reverberation effect. Since there are many types of such effects, some of the sophisticated effectors have many effect channels and can perform a plurality of types of effect processing at the same time. However, there is a problem that the sound output slot cannot provide output channels corresponding to the number of effect slots of the effector, and that the effector cannot be fully utilized even if the effector becomes sophisticated.

Further, when attempting to fade out with a conventional tone generator, it is necessary to transmit level control information (such as a MIDI control change message) at regular intervals from the sequencer driving the tone generator, which results in a smooth fade-out. In order to realize the above, there is a problem that the frequency of transmitting a message increases, the MIDI traffic increases, and the processing of the sequencer also increases.

[0006] The present invention provides effects and fade-in
It is an object of the present invention to provide a sound source device that can efficiently perform out.

[0007]

According to a first aspect of the present invention, there is provided a sound source apparatus having a plurality of sound generating slots including a waveform forming section for forming a musical sound waveform and an internal effector for processing the formed musical sound waveform. An output unit for outputting the musical tone formed by the unit to another sounding slot and a synthesizing unit for inputting the musical sound waveform of the other sounding slot and synthesizing it with the musical sound waveform synthesized by itself are provided in each sounding slot and synthesized by the synthesizing unit It is characterized in that a musical sound waveform is inputted to an internal effector.

According to a second aspect of the present invention, a plurality of output terminals connected to individual effect circuits are provided, and the level control means for controlling the output level of the formed musical tone is provided in a number smaller than the number of the output terminals. And a plurality of output terminals are connected to some of the level control means in a one-to-one correspondence, and a plurality of output terminals are connected to some of the other level control means via selectors. .

According to a third aspect of the present invention, there is provided a storage means for storing a plurality of types of level change modes, and selecting one of the level change modes when a fade instruction is issued, and selecting a tone level based on the level change mode. And a control unit for controlling.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A karaoke apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of the karaoke apparatus. FIG. 2 is a configuration diagram of music data used in the karaoke apparatus. FIG. 3 is a configuration diagram of a sound source device of the karaoke apparatus.

In FIG. 1, the karaoke apparatus comprises a karaoke apparatus main body 1, a control amplifier 2, a DVD changer 4, a speaker 5, a monitor 6, a microphone 7, and an infrared remote controller 8. The karaoke apparatus main body 1 controls the operation of the entire karaoke apparatus. The CPU 10, which is a control device of the karaoke apparatus main body 1, has a ROM 11, a RAM 12, a hard disk storage device 14, a communication control unit 15, a remote control receiving unit 16, a display panel 17, a panel switch 18, a sound source device 20, Voice data processing unit 21, effector 22, character display unit 2
3. The display control unit 24 is connected, and the control amplifier 2 and the DVD (digital video disk) changer 4, which are the external devices, are connected via an interface.

The ROM 11 stores a starting program and the like necessary for starting the apparatus. A system program for controlling the operation of the apparatus, a karaoke performance execution program, and the like are stored in the hard disk storage device 14. When the power of the karaoke apparatus is turned on, a system program and a karaoke performance program are read into the RAM 12 by the above-mentioned startup program.

In the hard disk storage device 14, in addition to a program storage area for storing the above-mentioned programs, a music data storage area for storing music data and the like are set. The song data storage area can store song data for thousands of songs, and stores song data of new songs regularly downloaded by the distribution center.

The RAM 12 has a program storage area for reading a program from the hard disk storage device 14 when the apparatus is started, a reservation list for registering the song number of the requested karaoke song, and an execution song for reading the song data of the karaoke song to be played. A data storage area and the like are set.

The communication control unit 15 is connected to a distribution center via an ISDN line. The distribution center periodically calls the karaoke apparatus and downloads music data of new songs, upgraded control programs, and the like.

The remote controller 8 has key switches such as a numeric keypad, and when a user operates these switches, a code signal corresponding to the operation is output by infrared rays. The remote control receiver 16 receives the infrared signal sent from the remote controller 8, restores the code signal, and
Input to PU10. When a music number is input from the remote control device 8, the CPU 10 registers the music number in a reservation list set in the RAM 12.

The panel switch 18 includes a numeric keypad, a key change switch, and a tempo change switch for inputting a music number similar to the remote control device 8.

The display panel 17 is provided in the karaoke apparatus main body 1.
The number of the song currently being played and the number of reserved songs are displayed.

The character display unit 23 has a VRAM and develops lyrics of karaoke songs into character patterns. This character pattern is input to the display control unit 24 as a video signal. When performing karaoke, the DVD changer 4 reproduces a background image, and this image signal is also input to the display control unit 24. The display control unit 24 superimposes the character pattern on the background video in a superimposed manner and displays it on the monitor 6. The DVDs stored in the DVD changer 4 include:
In addition to those that record background images, there are those that store music data of classic songs. When playing a classic song, if there are two drives, it is sufficient to set a DVD of music data in one of them, and a DVD of background video in the other. Is set in the drive, the requested music data is read out, written in the execution music data storage area of the RAM 12, and then the background video DVD is set in the drive.
The background video is played in parallel with the performance of the karaoke song.

As shown in FIG. 3, the tone generator 20 is provided with a sounding slot 31 for 64 channels, and can sound 64 tones simultaneously. Each sounding slot is provided with an effector (insertion effect) for not only forming a musical sound waveform but also processing the musical sound waveform to make it sound like a musical tone. The tone generated by the tone generator 20 is output to the effector 22. The effector 22 has two DSPs 22a and 22b as shown in FIG. 4, and each has four channels, that is, eight effect channels in total. The effects assigned to each effect channel are effects of a delay system and a phase control system, such as a reverb and a chorus, for giving a musical sound a certain width and width. Details will be described later.

The audio data processing unit 21 forms an audio signal having a specified length and a specified pitch based on audio data included in the music data. The sound data is a signal waveform that is difficult to form electronically, such as a human voice such as a back chorus, and is stored as it is as a PCM signal. The audio signal reproduced by the audio data processing unit 21 is input to the control amplifier 2.

Two microphones 7a and 7b are connected to the control amplifier 2, and the singing voice of the karaoke singer is input. The control amplifier 2 adds a predetermined effect (vocal effect) to the singing voice, mixes and amplifies the singing voice and the karaoke performance sound, and outputs the result to the speaker 5.

FIG. 2 is a diagram showing the structure of music data.
FIG. 1A is a diagram showing the overall configuration of music data. FIG. 2B is a diagram showing a configuration of a track of music data. The music data includes a header, a musical sound track, a lyrics track, an audio control track, an effect control track, a guide melody track, an audio data section, and the like. The header is a portion in which various data related to the music data is written, and includes data such as a music title, a genre, a release date, and a music performance time.

Each track of the musical tone track, the lyrics track, the voice control track, the effect control track, and the guide melody track is described in the MIDI format. The MIDI format includes a plurality of event data and timing data Δt indicating a read timing of each event data. The sequence program counts [Delta] t at a predetermined tempo clock, and when the read timing comes, reads out event data following the timing and outputs it to a predetermined processing unit. Data other than the tone track and the guide melody track are normal MI
Although not a DI message, this track is also described in MIDI format (system exclusive message) in order to standardize the implementation and facilitate the work process.

The musical sound track is composed of 16 or 32 tracks, to which musical instrument tones (parts) such as a piano, an electric guitar, and a drum set are assigned. Some musical instrument tones constitute one musical instrument tone in two parts, such as a shock sound when played and a sustained sound (slow decay sound) of a string vibration like a guitar tone. In each track, a note-on / off message for instructing sound generation or silence of a musical tone, a control change message for controlling an insertion effect 33 (see FIG. 3) for the musical tone, and the like are written.

The effect control track includes effect setting data for instructing what effect is to be assigned to each effect channel of the effector 22, and the tone of each part of the tone generator 20 is assigned to which effect channel. Send level setting data indicating whether or not to input is written.

FIG. 3 is a diagram showing the structure of the sound source device 20. This tone generator has a sounding slot 31 of 64 channels and a control unit 30 for controlling the sounding operation of each sounding slot 31.

The control unit 30 stores waveform forming information for forming a musical tone waveform of each musical instrument tone (part) and fade curve data (described later) for controlling an automatic fade mode of the musical tone. Sequencer (CPU1
The various MIDI messages received from 0) are stored. The contents include the instrument tone (part) assigned to each MIDI channel, the insertion effect assigned to each part, the send level (to the external effector 22) of the musical tone of each part, and the like. FIG. 4B shows the stored contents.

When a note-on message instructing the generation of a musical tone is input from the sequencer, the musical tone is assigned to one of the (currently inactive) sounding slots (random assignment). Then, the waveform formation information of the instrument tone (part) assigned to the MIDI channel to which the note-on message has been input, the velocity data included in the note-on message, the setting data of the insertion effect, and the send to the external effector 22 The tone data is started by inputting level data and the like into the tone generation slot 31.

Each tone generating slot 31 includes a waveform forming section (wave generator) 32 and a fader / equalizer section 3.
3, an effector (insertion effect) 35, a level control unit 36, and a fader / equalizer unit 33
An output unit 37 for outputting a musical tone waveform to another tone generating slot and an adder 34 for inputting a musical tone waveform from the other tone generating slot are inserted between the tone generator and the effector 35.
Although one effector 35 is provided in each sounding slot in FIG.
5 may be provided outside instead of being provided, and when the application of the effect to the musical sound waveform is requested, an effector may be inserted into the sounding slot (insertion) to apply a desired effect.

The waveform forming section 32 forms a tone waveform based on tone waveform data and velocity data supplied from the control section 30. This tone waveform is equalized by the fader / equalizer unit 33. When fading this tone, the output is faded by inputting a fade level signal to the fader / equalizer unit 33 every moment. Details of the fade function will be described later. The musical sound waveform equalized by the fader / equalizer unit 33 is input to the effector 35 via the adder 34.

The effector 35 gives an effect to the input musical sound waveform. This effector 35
The effect (distortion etc.) for processing the musical sound waveform such as distorting the waveform to make the tone sound like the part is added. The musical sound waveform to which the effect is given by the effector 35 is input to the level control unit 36.

FIG. 3B shows a detailed diagram of the level control section 36. The level controller 36 divides the input musical sound waveform into four output channels (channel a, channel b, channel c, and channel d), and includes a send amplifier 40 and a pan circuit 41 for each output channel. The send amplifier 40 is an amplifier (a coefficient multiplier in the case of digital) for controlling the output level (send level) of the tone waveform for the output channel.
The pan circuit 41 is a circuit that splits the musical tone waveform input to the output channel into two left and right channels and sets an output level for each channel.

On the other hand, the sound source device has eight output terminals 43, namely terminals 43a to 43h. Output terminal 43
An output channel a is connected to a. Output terminal 4
The output channel b is connected to 3b. The output channel c is connected to the output terminal 43c. Also,
The selector 42 is connected to the output terminals 43d to 43h. The selector 42 selectively connects one of the output terminals 43d to 43h to the output channel d according to a selection signal input from the control unit 30. The output terminal 43
Level control units 36 of all 64 sounding slots are connected to a to 43h, and musical sounds generated by each sounding slot and distributed to each output channel are collected and output.

The send level setting data of the effect control track of the music data has a MID indicating which channel of the output terminals a to h is output at which level.
Instruction is given for each I channel. However, outputs to the output terminals d to h are described so as not to overlap. The control unit 30 that has input the data outputs the output terminals a to c.
Output to each output channel a
To the output channel c. If output to the output terminals d to h is instructed, the signal is output to the output channel d, and the selector 42 is set to select the instructed output terminal.
Switch.

In the figure, the output terminal 4 of the sound source device 20
Four output terminals 3a to 43d are connected to four effect channels of the DSP 22a, and output terminals 43e to 43d
3h is connected to the four effect channels of the DSP 22b. Each DSP 22a, 22b can process four types of effects corresponding to each input channel in parallel. Of these, the three channels (channel a, channel b, and channel c) of the DSP 22a are:
The content of the effect is predetermined. Channel a is dry (no effect), channel b is reverb, and channel c is chorus. Channel d and DSP 22 which are the fourth channel of DSP 22a
Various effects are assigned to the four channels b (channels e to h) for each music piece (music piece data). The effect is assigned based on the effect designation data described in the effect control track of the music data. Since the effect designation data is described at the head of the track, a predetermined effect is assigned to each channel before the start of the music.

Since the effect is constituted by the DSP, the assignment of the effect is a process of incorporating a processing procedure and parameters into steps corresponding to the effect channel.

As a result, the output channels of the tone generation slots are four, but four types are selected and assigned from eight types of effects for each tone slot (actually, each part assigned to each tone generation slot). be able to. In this embodiment, a plurality of output terminals can be selected by connecting the selector 42 only to the output channel d. However, a plurality of output terminals may be connected to other output channels via the selector. You may.

Here, one instrument tone may be composed of a plurality of parts as in the case of the guitar tone described above. A plurality of parts are assigned in the tone generator to the MIDI channel to which such a musical instrument tone is assigned, and note-on events and note-off events of the MIDI channel are input to the plurality of parts (FIG. 4). (See MIDI second channel in (B)). On the other hand, the musical tone waveforms of the plurality of parts become musical tones of one musical instrument tone only after being added and synthesized. Each sound slot 31
Although each of the effectors 35 is provided with an insertion effect, an ideal effect cannot be provided even if the musical sound waveforms of a plurality of parts constituting one instrument tone color pass through the effector 35 separately.

Therefore, in such a case, the control unit 30
One tone generation slot of the master is determined from a plurality of tone generation slots to which the formation of musical tone waveforms of a plurality of parts is assigned, and the other tone generation slots are set as slaves. Then, the tone waveform output from the fader / equalizer unit 33 of the slave sounding slot is set to be input to the adder 34 of the master sounding slot (see FIG. 4A). The adder 34 of the master sounding slot adds and synthesizes the musical sound waveform formed by its own sounding slot and the musical sound waveform inputted from the slave sounding slot, and then applies this musical sound waveform to the effect 3.
Enter 5 Thus, even for a musical instrument tone composed of a plurality of parts, it is possible to apply an effect after forming a waveform of one musical instrument tone.

As described above, since only the effector 35 of the master sounding slot actually causes the effector 35 to function, the processing load is reduced, and the amount of processing (deformation) corresponding to the tone level such as distortion is performed. In the case of the effect to be applied, a correct amount of effect can be applied because the effect is applied to the musical sound waveform that has been added and synthesized to the original musical sound level.

Even if the music data is a musical instrument tone composed of a plurality of parts, the effect can be controlled by one data, so that the description becomes easy and the data amount can be reduced correspondingly.

A fade message is written in the effect control track of the music data as one of the event data. The fade message is composed of data indicating "target value, speed, characteristic", and is data indicating the fade of the tone currently being sounded and its mode. In the case of fade-out, the target value is 0.

Sequencer (program on CPU 10)
Reads out the music data and inputs a fade message to the tone generator 20, the control unit 30 determines a sounding slot to which the MIDI channel (part) instructed to be faded is assigned, and for a predetermined time (for example, The output gain changed every 10 ms) is output. This output gain is set to fader equalizer 3
In step 3, the output level of the musical tone waveform is changed. As described above, the sequencer only needs to output the fade message at the time of the fade start, and it is not necessary to input the level control message to the sound source device 20 at regular intervals.

The control unit 30 stores a plurality of fade waveforms for determining the mode of the fade as shown in FIG. 5, and when a fade message is input, selects one fade waveform based on the characteristic data. The y-axis is an output gain coefficient, where the origin indicates the current value and the upper limit indicates the target value. The x-axis is a time axis, where the origin is at the start and the right end is at the end of the fade. The control unit 30 increases the value of x in increments specified by the speed data, and obtains a function (fade waveform) value y corresponding to x. Then, an output gain coefficient between the current value and the target value is calculated using the y, and the output gain coefficient is calculated by the fader equalizer 3.
Output to 3.

The fade message is composed of one MID.
In some cases, only the I channel is specified, but all MIDI
Sometimes a channel is specified. In this case, the above processing is executed for all the sounding slots. All MIDs
To specify a fade for the I channel, for example,
There is a case where a song ends with a fade-out at the end of the song.

In addition to the case where a fade message is described in music data, a fade may be performed by a user operation. For example, when the user turns on the stop key and stops playing (fade out)
There are also cases where the pause key is turned on to pause the performance (fade-out), and where the restart key is turned on to restart the performance (fade-in).

The karaoke apparatus 1 stores a fade message corresponding to each operation in the RAM 12 or the like in preparation for such various fade instruction operations, and when a fade instruction operation is performed, a fade message corresponding to the operation. May be input to the sound source device 20 by interruption.

[0049]

According to the first aspect of the present invention, an effect can be applied to a tone composed of a plurality of tone waveforms after the plurality of musical tones are synthesized. In addition to being able to perform the effect processing in one system, the processing load can be reduced.

According to the second aspect of the present invention, when a plurality of output terminals are respectively connected to individual effect circuits, the effect circuit which is always used or the effect circuit which is used regardless of the instrument tone is used. By connecting directly from the level control means and connecting the effectors that are sometimes or depending on the instrument tone through selectors, many effect circuits can be used while simplifying the circuit configuration. Become.

According to the third aspect of the present invention, since the external device automatically fades only by instructing the sound source device to fade, communication between the external device and the sound source device can be simplified. Further, one of a plurality of level change modes is selected, and the fade is performed in that mode, so that the fade according to the scene can be easily applied.

[Brief description of the drawings]

FIG. 1 is a block diagram of a karaoke apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of music data of the karaoke apparatus.

FIG. 3 is a diagram showing a configuration of a sound source device of the karaoke apparatus.

FIG. 4 is a diagram illustrating grouping of the sound sources.

FIG. 5 is a diagram showing a fade waveform stored in a control unit of the sound source.

[Explanation of symbols]

20 ... sound source device, 22 ... (external) effector, 22a,
22b ... DSP, 31 ... Sound generation slot, 32 ... Waveform formation unit, 33 ... Fadic equalizer, 34 ... Synthesis unit, 35 ...
Effector, 36: Level control unit, 37: Output unit, 40
... Send amplifier, 41 ... Pan circuit, 42 ... Selector, 4
3. Output terminal

Claims (3)

[Claims] 1. A sound source device comprising a plurality of sound generating slots including a waveform forming section for forming a musical sound waveform and an internal effector for processing the formed musical sound waveform, wherein each sound generating slot is adapted to transmit a musical tone formed by the waveform forming section. An output section for outputting to another sounding slot and a synthesizing section for inputting a musical sound waveform of another sounding slot and synthesizing it with a musical sound waveform synthesized by itself, and for inputting the musical sound waveform synthesized by the synthesizing section to the internal effector apparatus. 2. A method according to claim 1, wherein a plurality of output terminals connected to the individual effect circuits are provided, and level control means for controlling an output level of the formed musical tone are provided in a number smaller than the number of the output terminals. An output terminal is connected to the level control means in a one-to-one correspondence, and a plurality of output terminals are connected to other part of the level control means via a selector. 3. A storage means for storing a plurality of types of level change modes, and a control for selecting one level change mode when a fade instruction is issued, and controlling a tone level based on the level change mode. Sound source device comprising: