JPS58220191A - Singing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to electronic music equipment that reproduces musical tones and voices through an electronic circuit system.

As a conventional electronic music device, there is something called a synthesizer. This is used to specify keyboard operations, barcode reading, aru (* indicates the pitch of the reproduced sound by voice input), duration (length of the sound), intensity, etc. Although it is not impossible for such a synthesizer to synthesize and reproduce sounds similar to human voices, it should be considered a kind of musical instrument.

As an electronic music device for the purpose of singing, there is a so-called "karaoke device." This is a type of loudspeaker with an accompaniment function, although it may have audio modification functions such as reverberation effects added, and the sound input through the microphone is played back essentially as is.

OBJECT OF THE INVENTION An object of the present invention is to provide a novel electronic device for singing (hereinafter referred to as a singing device).

More specifically, the present invention provides audio signals corresponding to the lyrics and musical tone information corresponding to the main melody.
To provide a singing device that reproduces a song at the correct pitch.

Outline The singing device according to the present invention includes pitch converting means, means for manually inputting audio signals, musical tones, and news to the pitch converting means, and electro-acoustic converting means. The pitch conversion means performs pitch conversion on the input audio signal by combining the pitch with the pitch designated by the musical tone information input at the same time. This pitch-converted audio signal is sent to an electro-acoustic conversion means, converted into sound, and output.

Embodiment FIG. 1 is a block diagram showing an embodiment of the present invention. This embodiment is a device that automatically generates an audio signal from pre-stored information and automatically sings.

In the figure, 1 is a character code memory in which a character code string of lyrics is stored. For example, assuming the song "Kojo no Tsuki", [-Haruko Orou no Hananoen...]
The character string is stored. A musical tone code memory 2 stores musical tone code strings in which musical tone signals corresponding to the main melody and accompaniment of a song are encoded. Musical tone codes include information on pitch, intensity, and duration.

When this device is started, the controller 3 sequentially reads musical tone codes from the musical tone code memory 2, and converts the corresponding character code for each unit note (usually corresponds to one note of the main melody) into voice from the character code memory 1. ROM
(Read-only memory) Read to 4. The voice conversion ROM 4 outputs voice information corresponding to the input character code, and the decoder 5 converts it into an analog voice signal. This audio signal (state before undergoing pitch conversion) is sent to the sampling circuit 7 and the comparator 6.
sent to.

The comparator 6 compares the audio signal with the 0 level and outputs a signal every time the audio signal crosses the O level. The counter 8 counts the clock signal CLK at a constant period from when the output signal of the comparator 6 is output to when the next output signal is output, and calculates the fundamental frequency f of the audio signal. Detect. This fundamental frequency f. information is sent to the frequency converter 9.

When an audio signal for a certain character code is generated, the frequency converter 9 inputs the pitch of the corresponding main melody tone (1) from the controller 3.The frequency converter 9 converts these two frequencies. In order to change the fundamental frequency of the audio signal (output signal of the decoder 5) so as to cancel out the difference between f1 and 10, the sampling frequency FA of the sampling circuit 7 and the readout frequency FB of the buffer memory IJ lo are
Set. That is, the sampling circuit 7 converts the audio signal to its fundamental frequency F. Sampling is performed at a sufficiently higher frequency FA, and the sampling signal is once sent to the buffer memory 10. This way, a pitch-converted audio signal is obtained, but since this is a sampling signal, it is passed through a low-pass filter 11 and then input to an amplifier 12. Ru.

The controller 3 transmits the pitch (fl) and duration of the main melody tone from the musical tone code read from the musical tone code memory 2 to the frequency converter 9, but also transmits the musical tone signals (analog signals) of the main melody and accompaniment to an internal decoder. (not shown) and inputs it to the amplifier 12. Therefore, the speaker 13 driven by the output of the amplifier 12
(Other electro-acoustic conversion means may also be used), audio and musical tones are output simultaneously. Note that the musical tone signal and audio signal input to the amplifier 12 have a constant level, and if left as they are, a sound with no intensity will be output from the speaker 13. Therefore, the controller 3 sends to the amplifier 12 a control signal indicating the intensity of the tone specified by the tone code. The output level of the amplifier 12 is controlled in accordance with this control signal, and thus the sound quality of the speaker 13 is controlled.

Although not mentioned above, if the fundamental frequency of the audio signal changes widely due to pitch conversion, the length of the audio signal in the buffer memory 10 may be insufficient. That is, this is a case where the end of the audio signal in the buffer memory 10 is read out before the duration specified by the controller 3 has elapsed. In this case, the frequency converter 9 repeatedly reads out an interval of about C from the rear end of the audio signal from the buffer memory January 0, and uses it to cover the shortage of the audio signal.

This takes advantage of the characteristic that the waveform is almost constant in the latter half of the audio signal, and generally does not cause any problems.

The process of generating the pitch-converted audio signal as described above is schematically shown in FIG. In the same figure, 11M is the character code 1
. Here, it is assumed that the character codes of "ko", "o", and "gu" are also read out from the character code memory 1 in this order.

N is a tone code (code of the corresponding note of the main melody) corresponding to the character code, and is read out from the tone code memory 2. P is the waveform of the straddle signal generated by the decoder 5 for each character code. Q is the fundamental frequency 1 of the audio signal
It is ゜. 1t is the waveform of the audio signal after pitch conversion.

FIG. 3 is a block diagram showing another embodiment of the present invention. In this embodiment, the voice is directly inputted manually through the microphone 2o, and can be used as a type of ``karaoke apparatus'' having a pitch correction function. Note that parts equivalent to those in FIG. 1 are given the same reference numerals and will not be described.

When this device is activated, the musical tones (main melody and accompaniment) of a certain song are output from the speaker 13 in accordance with the musical tone code read out from the musical tone code memory 2. The volume of this musical tone is controlled by adjusting the level of the musical tone signal within the amplifier 12 using a control signal output from the controller 3.

Microphone 20 according to the musical sound coming from spill force 13
When the lyrics are recited or sung (even if out of tune), the audio signal is amplified by the preamplifier 21 and input to the comparator 6, the sampling circuit 7, and the peak hold circuit 22. . In other words, analog audio signals are directly input. This audio signal is outputted from the speaker 13 after being pitch-converted in the same manner as in the previous embodiment.

Here, the peak hold circuit 22 is provided to detect the envelope of the audio signal. Inside the amplifier 12, the audio signal level is adjusted according to the level of the output signal of the peak hold circuit 22 (intensity of input audio). As a result, the level of the audio output from the speaker 13 is
It changes depending on the strength of the human voice.

Note that in this embodiment, the input audio signal is l+l
It is preferable to store the data in the buffer memory 10 in small chunks of about 1J seconds.

In each of the above embodiments, musical tone information is encoded and stored, but the present invention is not limited to this. For example, a musical tone may be recorded in the form of an analog signal on a medium such as a magnetic tape, and then the fundamental frequency of the main melody tone may be detected from the reproduced musical tone signal. This detection can be easily performed in the same manner as for audio signals. Similarly, it is also possible to manually reproduce audio signals from magnetic tape or the like.

Effects The present invention is as described above, and if the audio information of the lyrics is stored in advance or the audio signal is directly input through a microphone or the like, the song can be reproduced with the correct g-level. Therefore, according to the present invention, it is possible to realize a tone correction training device, a karaoke device for tone habits, an automatic singing device based on the voice value of an arbitrary person, and the like.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a diagram explaining audio signal generation and pitch conversion in the same embodiment, and FIG. 3 is a block diagram showing another embodiment of the present invention. It is a diagram. 1... Character code memory, 2... Musical tone code memory, 3... Controller, 4... Voice conversion ROM, 5
... Decoder, 6... Comparator, 7... Sampling circuit, 8... Counter, 9... Frequency converter, 10... Buffer memory, 11... Low pass filter, 12... Amplifier, 13...Speaker, 20
...Microphone, 21...Preamplifier, 22...
peak hold circuit. Representative Patent Attorney Makoto Suzuki Figure 2 Figure 3

Claims (1)

[Claims] (1) The pitch converting means includes a pitch converting means, a means for inputting an audio signal and musical tone information to the pitch converting means, and an electro-acoustic converting means, and the pitch converting means specifies the pitch in the voice signal using the musical tone information. A singing device that performs pitch conversion to match the pitch of the vocalist, and converts the pitch-converted audio signal into sound using the electric g-acoustic conversion means and outputs the sound.