JP3234589B2 - Audio processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice processing apparatus for converting the pitch of a voice to produce a sound effect.

[0002]

2. Description of the Related Art In order to make it easier to play an electronic musical instrument, an electronic musical instrument has been put to practical use that automatically produces an additional sound in accordance with the melody of a single note played. Further, in order to increase the sense of spread and fun of musical tones to be pronounced, devices for converting and outputting pitches of sounds to be produced have been put to practical use.

[0003]

As described above, in an electronic musical instrument that produces an additional sound for a single-tone melody as described above, a separate sound source for the additional sound is provided in addition to the melody sound source (musical sound wave forming circuit). Is required, and there is a disadvantage that the circuit configuration becomes complicated.

A conventional apparatus for automatically converting pitches and outputting the pitches uses an input voice at a designated pitch (lower 5 pitches).
Degree, upper third degree, etc.)
When used in a long melody, it becomes monotonous,
In the case where a chord is pronounced in addition to the melody tone, there is a drawback that the harmony with the chord is not considered, and thus the discord becomes dissonant.

[0005] The present invention provides a chord for producing a chord.
An object of the present invention is to provide a voice processing device that solves the above-described problem by converting the pitch of input voice based on information .

[0006]

According to a first aspect of the present invention, there is provided a voice input means for inputting a voice signal, and a voice signal stored in a storage device.
Chord information to read chord information to make a chord sound
Information reading means, and said reading means for producing a chord.
Output means for outputting the selected chord information to the sound source device
And the pitch of the audio signal input by the audio input means.
Of the chords represented by the chord information
Pitch to convert to pitch corresponding to one of the constituent sounds
Pitch conversion parameter generation means for generating conversion parameters
And voice input means based on the pitch conversion parameter.
The input audio signal is composed of a plurality of constituent sounds of the chord.
The pitch is converted to the pitch corresponding to the other component sound, and
And pitch conversion means for outputting the converted audio signal, the audio input
And the audio signal input by the force means, a mixer for mixing the audio signal pitch conversion by the pitch conversion means,
Output means for outputting the audio signal mixed by the mixer
And characterized in that:

[0007] The invention according to claim 2 is based on the pitch conversion parameter.
Means for generating a voice signal input by the voice input means.
The pitch of the chord is divided into multiple chords represented by chord information.
Sounds for converting to multiple pitches corresponding to the synthesized sound
Configured to generate high conversion parameters,
The pitch conversion means, based on a pitch conversion parameter,
The voice signal input by the voice input means is
Pitch conversion to multiple pitches corresponding to multiple component sounds respectively
And output a plurality of audio signals with the same pitch conversion.
It is characterized by comprising.

[0008] The invention according to claim 3 is based on the pitch conversion parameter.
Means for generating a voice signal input by the voice input means.
The pitch of the chord is divided into multiple chords represented by chord information.
Sounds for converting to multiple pitches corresponding to the synthesized sound
Configured to generate high conversion parameters,
The pitch conversion means, based on a pitch conversion parameter,
The voice signal input by the voice input means is
Pitch conversion while switching to different component pitches in a short time
And output the same pitch-converted audio signal.
And wherein the octopus.

[0009]

In the voice processing apparatus according to the present invention, a voice signal is input from the voice input means, and the voice signal is pitch-converted by the pitch conversion means. The pitch-converted audio signal (converted audio signal) and the audio signal (direct audio signal) input from the audio input unit are mixed by a mixer and output. The voice input means can be constituted by a microphone, a line input device, or the like.

The pitch conversion means converts the voice signal to a pitch different from the input pitch. According to the invention of claim 1, the input voice signal is converted into chord information reading means.
Table by chord information read out from the storage device by the
Corresponding to one of the constituent tones of the selected chord
Is converted to a pitch. Also, this chord information emits chords.
The sound is output to the sound source device for sound. This allows the song
When the singer sings the melody part, the melody
Music signal converted to the accompaniment part pitch
Harmony suitable for
Chords are also pronounced automatically.

According to the second aspect of the present invention, the input voice
The signal is read from the storage device by the chord information reading means.
Multiple constituent tones of the chord represented by the emitted chord information
Are converted to a plurality of pitches corresponding to the respective pitches. Also,
In this case as well, the chord information is used to generate a chord.
Output to the device. This allows the singer to play the melody par
When you sing, the sound signal of the melody part is automatically added.
Musically suitable harness converted to multiple pitches
At the same time that monies are obtained, the chords based on the tone signal are automatically
Will be pronounced.

According to the third aspect of the present invention, the input voice
The signal is read from the storage device by the chord information reading means.
The different constituent tones of the chord represented by the emitted chord information
The pitch is converted while switching to the new pitch in a short time. Also,
In this case as well, the chord information is used to generate a chord.
Output to the device. This allows the singer to play the melody par
When you sing, the sound signal of the melody part is automatically added.
Music with an arpeggio effect converted to the pitch of the playing part
Harmony that is suitable for
The resulting chord is also automatically pronounced.

[0013]

FIG. 1 is a block diagram of a voice processing apparatus according to an embodiment of the present invention. This device is a device which converts the sound input from the microphone 1 into a pitch with the pitch conversion LSI 5 and then outputs the sound together with the original sound by the mixer 6.

The main part of this device is constituted by a digital circuit. The audio input from the microphone 1 is amplified by the amplifier 2 and then converted into a digital signal by the A / D conversion circuit 3. The digital signal converted by the A / D conversion circuit 3 is input to a pitch detection circuit 4, a pitch conversion LSI 5, and a mixer 6. The pitch detection circuit 4 and the pitch conversion LSI 5 are connected to the CPU 10.

The CPU 10 also has ROM 11, R
The AM 12, the external storage device 13, the panel switch 14, and the MIDI connector 15 are connected. ROM11
Stores a program for processing the input digital data. The external storage device 13 is composed of a floppy disk device or a karaoke set. Chord sequence data (chord progression data) is stored in the floppy disk to be set in advance. A performance device (electronic musical instrument) such as a keyboard is connected to the MIDI connector 15. The chord detection device 17 detects the type and root of the chord from the key data input, and then outputs chord information to the CPU 10.

The pitch of the voice is detected by the pitch detection circuit 4 and the pitch information is output to the CPU 10. CPU
10 is stored in the external storage device 13 or M
Based on the chord information input via the IDI connector 15, it is determined how much (how many cents) the pitch of the voice input from the microphone 1 should be converted, and the parameter is output to the pitch conversion LSI 5. . Pitch conversion LSI5 is CP
Based on the parameters input from U10, the pitch of the direct voice, which is the input voice signal, is converted to generate a converted voice. Here, the pitch conversion is performed by a well-known method of interpolating data in accordance with the conversion ratio.
The SI5 has a buffer, a clock, and an arithmetic circuit for this purpose.

Pitch-converted speech (harmony speech)
Is input to the mixer 6. The sound (direct sound) input from the microphone 1 and converted into digital is also input to the mixer. The mixer 6 adds the harmony sound and the direct sound and inputs the result to the D / A conversion circuit 7. The D / A conversion circuit 7 converts the added signal into an analog signal. The analog converted sound is amplified by the amplifier 8 and output from the speaker 9.

FIGS. 2 and 3 are flowcharts showing the operation of the CPU 10. The operation in FIG. 2 is an operation when chord information is input from a chord sequencer (external storage device 13), and the operation in FIG. 3 is chord information (key data).
Is input from a performance device connected to the MIDI connector 15. This operation is an operation executed by the CPU 10 every several ms.

In FIG. 2, first, the buffer of the pitch detection circuit 4 is read (n1). When the pitch detection circuit 4 can detect the pitch of the input voice, the pitch is stored in the buffer. If no pitch is detected or no sound is input, data without pitch detection (FF _H ) is stored in the buffer. When the pitch is detected, the process proceeds from n2 to n3, and when the pitch is not detected, the process directly returns from n2.

At n3, the chord information specified at the present time (at the timing) is read from the external storage device 13. The chord information is output to the MIDI connector 15 in order to cause the tone generator connected to the outside to emit the chord (n4). A pitch conversion parameter is calculated to convert the direct sound into a constituent sound of this chord in the accompaniment tone range and generate the sound (n5). The pitch is converted to a pitch corresponding to a constituent note name of a chord within an accompaniment tone range (a pitch lower than the melody range). For example, if the chord components are G ₁ , C ₂ , E ₂
If, this direct sound will be converted to this one pitch, it is reasonable to select the E ₂ is a three-degree sound as pitch conversion parameter in this case. This parameter is output to the pitch conversion LSI 5 (n6). The pitch conversion LSI 5 receiving this parameter directly converts the voice into a harmony voice.

In FIG. 3, first, the buffer of the pitch detection circuit 4 is read (n11). When the pitch is detected, the process proceeds from n12 to n13, and when the pitch is not detected, the process directly returns from n12.

At n13, the chord being played by the playing device (electronic musical instrument) connected by the MIDI connector 15 is read. In this case, if the playing device is a device that outputs chord information, the chord information may be used directly.If the playing device does not output chord information, a chord detecting device based on the input key press pattern or the like is used. At 17, a chord is determined (n14). A variety of chord determination methods can be applied, such as a method of applying a chord component to a table that stores chord component sounds that are well known in the art.

If the chord can be determined, pitch conversion parameters for directly converting the voice into the constituent sounds of the chord are calculated (n15 → n16). Since this conversion method is the same as the method described with reference to FIG. 2, the description is omitted here. This parameter is output to the pitch conversion LSI 5 (n17). Pitch conversion LS receiving this parameter
I5 directly converts the voice into the converted voice. The other constituent sounds of the determined chord are not output again from the MIDI connector 15 assuming that they have already been generated by the performance device (electronic musical instrument). If the chord cannot be determined in n14, pitch conversion cannot be performed.
Returns directly from

In this embodiment, one pitch conversion LSI 5 is provided so as to convert it into one of the chord constituent sounds. However, a plurality of pitch conversion LSIs 5 are provided in parallel and all the chord constituent sounds ( A root tone, a third note, a fifth note, and a seventh note in the case of a 7th chord) may be simultaneously converted. In this way, a chord can be produced only with this device.

Even when only one of the chords is output as in this embodiment, the root, the third and the fifth are switched in a short period of time so that an arpeggio-like sound can be obtained. It can also be effective. Further, this effect can be similarly (more complicated) realized in a device that can simultaneously output a plurality of chord constituent sounds.

[0026]

According to the chord processing apparatus of the invention, as described above, according to the present invention, the singer sparse song the melody part, automatically same
Converts the audio signal of the melody part to the pitch of the accompaniment part
In addition to providing musically appropriate harmony,
Chords from sound signals are also automatically generated, making them musically suitable
And various effects can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of an audio processing device according to an embodiment of the present invention .

FIG. 2 is a flowchart showing the operation of the voice processing device.
It is.

FIG. 3 is a flowchart showing the operation of the voice processing device.
It is.

[Explanation of symbols]

1. Microphone, 4. Pitch detection circuit, 5. Pitch conversion LSI,
10 CPU, 13 external storage device (code sequencer), 15 MIDI connector.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-174096 (JP, A) JP-A-59-116696 (JP, A) JP-A-59-126294 (JP, U) 25676 (JP, B2) Jiko 63-36400 (JP, Y2) (58) Fields studied (Int. Cl. ⁷ , DB name) G10K 15/04 G10H 1/00 G10H 1/10 G10H 1/38

Claims (3)

(57) [Claims] An audio input means for inputting an audio signal,Chords stored in the storage device to produce chords
Chord information reading means for reading information; The read chord information is used to generate a chord.
Chord information output means for outputting to a source device; Pitch of a voice signal input by the voice input means
Is a plurality of constituent tones of the chord represented by the chord information.
For converting to pitch corresponding to one of the constituent sounds
Pitch conversion parameter generation for generating pitch conversion parameters
Means, The voice input means based on the pitch conversion parameter
A plurality of constituent sounds of the chord
The pitch is converted to the pitch corresponding to one of the constituent sounds.
Pitch conversion means for outputting a pitch-converted audio signal, An audio signal input by the audio input means;
Mix with the sound signal whose pitch has been converted by the pitch conversion means
Mixer, Said Audio mixed by mixersignalOutput to
meansAndAn audio processing device comprising: (2)Voice input means for inputting a voice signal; Chords stored in the storage device to produce chords
Chord information reading means for reading information; The read chord information is used to generate a chord.
Chord information output means for outputting to a source device; Pitch of a voice signal input by the voice input means
Is a plurality of constituent tones of the chord represented by the chord information.
Pitch conversion for converting to multiple pitches corresponding to
Pitch conversion parameter generation means for generating a conversion parameter
When, The voice input means based on the pitch conversion parameter
Sound entered by A voice signal comprising a plurality of constituent tones of said chord
The pitch is converted to multiple pitches corresponding to the
Pitch conversion means for outputting a plurality of converted voice signals, An audio signal input by the audio input means;
Mix with the sound signal whose pitch has been converted by the pitch conversion means
Mixer, Said Audio mixed by mixersignalOutput to
meansAndAn audio processing device comprising: (3)Voice input means for inputting a voice signal; Chords stored in the storage device to produce chords
Chord information reading means for reading information; The read chord information is used to generate a chord.
Chord information output means for outputting to a source device; Pitch of a voice signal input by the voice input means
Is a plurality of constituent tones of the chord represented by the chord information.
Pitch conversion for converting to multiple pitches corresponding to
Pitch conversion parameter generation means for generating a conversion parameter
When, The voice input means based on the pitch conversion parameter
The sound signal input by the
The pitch is converted while switching to the pitch of the
Pitch conversion means for outputting a converted audio signal, An audio signal input by the audio input means;
Mix with the sound signal whose pitch has been converted by the pitch conversion means
Mixer, Said Audio mixed by mixersignalOutput to
meansAndAn audio processing device comprising: