JPH0458295A - Key controller - Google Patents

Abstract

PURPOSE:To automatically control the musical interval of a taped accompaniment corresponding to the musical interval of a singer by automatically controlling the interval of played music based on pitch difference between the detected pitch of a played sound and a reproduced pitch from a recording medium. CONSTITUTION:For the pitch information of a vocal melody, a pitch difference detection circuit 17 detects difference from pitch information detected by a pitch detection circuit 18. The circuit 18 outputs the output data of an A/D converter 18b as information showing the pitch of the vocal melody to be inputted to a microphone 12. The difference detected by the circuit 17 expresses the difference between the fundamental pitch of the vocal melody and the pitch of the vocal melody of the singer. For this pitch difference information, an average value is calculated by an arithmetic circuit 20, and this average value becomes a control input to decide the shift amount of the musical interval in a musical interval control circuit 11. The circuit 11 automatically controls the musical interval of the taped accompaniment only for the shift amount corresponding to the control input.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a key controller that adjusts the pitch (key) of a performance piece.

Background technology For example, karaoke equipment uses a singer's favorite pitch (key).
It is equipped with a key controller that allows you to adjust the pitch of karaoke songs so that you can sing them.

Conventionally, key controllers have been used that allow singers to manually adjust the pitch of a karaoke song at the time of use to set the pitch to their preference. Therefore, in order to reset the pitch in the middle of a song, the singer must manually adjust the pitch by operating buttons or the like while singing, which is cumbersome.

Summary of the Invention [Object of the Invention] Therefore, an object of the present invention is to provide a key controller that can automatically adjust the pitch of a karaoke song according to the pitch of a singer.

[Structure of the Invention] A key controller according to the present invention includes a performance device that plays a recording medium in which pitch information of a performance piece and a performance sound corresponding to the performance music is recorded, and a performance device that detects the pitch of the performance sound emitted by a player. pitch detection means for detecting a pitch difference between a reproduced pitch obtained from the recording medium by the performance device and a pitch detected by the pitch detection means; output from the performance device by the performance of the recording medium; and pitch adjustment means for automatically adjusting the pitch of the performance music to be performed based on the pitch difference.

[Operation of the Invention] The key controller according to the present invention detects the pitch difference between the detected pitch obtained by detecting the pitch of the performance sound emitted by the player and the reproduced pitch obtained from the recording medium during the performance, and To automatically adjust the pitch of a performance song based on the pitch difference.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As the source of the karaoke device equipped with the key controller according to the present invention, a recording medium such as a digital audio disc called a compact disc (CD), a video disc containing digital audio in CD format, a memory, or a DAT can be used. However, in this embodiment, it is assumed that, for example, a compact disc is used as the source.

In a compact disc applied to a karaoke apparatus equipped with a key controller according to the present invention, each information of a plurality of karaoke songs is recorded as main code information, and the vocal melody information corresponding to each karaoke song is recorded as the user's bit of the subcode ( For example, MIDI (Musical Instrument
Digital Interface) format. A standard has already been proposed for recording information in MIDIID-mat for user's bits of subcodes.

FIG. 2 shows the structure of a note-on message, which is one of the channel voice messages, as an example of a MIDI ID message. In such messages, the status byte note-on is, for example, a command corresponding to the action of pressing a key on a keyboard, and is used in note-off and bare, which correspond to the action of releasing a key on the keyboard. The note number in data byte 1 specifies any one of the 128 scales assigned to the keyboard centered on "middle C" (for example, 60) of an 88-key piano. The velocity of data byte 2 is generally used to differentiate the strength of the sound. Therefore, when a vocal melody corresponding to a karaoke song is recorded as performance information in the user's bit using MIDIID-mat, the pitch of the vocal melody is represented by the note number of data byte 1.

In FIG. 1, a compact disc 1 is rotationally driven by a spindle motor 2, and recorded information is read by a pickup 3. The output signal of pickup 3 is E F M (Eight to Fourteen
This EFM signal passes through the RF amplifier 4 and is EFM demodulated by the EFM demodulation circuit 5. The EFM demodulation circuit 5 separates main code data and subcode data and outputs them. The main code data is error corrected by the error correction circuit 6 and sent to the D/
The A converter 7 converts the signal into an analog signal and outputs it as reproduced audio information. The subcode data is decoded by a subcode decoder 8. As described above, a disc player 10 for playing the compact disc 1 is configured.

The reproduced audio information output from the disc player 10 is karaoke song information, and after passing through the pitch adjustment circuit 11, it is mixed with the vocal information output from the microphone 12 in the mixer 13, and then sent to the speaker 1 via the amplifier 14.
5 drive inputs.

On the other hand, the subcode signal output from the disc player 10 is supplied to the MIDI ID-der 16, and this MIDI
MIDI ID of user's bit in ID-da 16
- The mat note number (see Figure 2) is decoded and output as vocal melody pitch information. The pitch difference detection circuit 17 calculates the difference between the pitch information of the vocal melody and the pitch information detected by the pitch detection circuit 18. For example, the pitch detection circuit 18 converts the output frequency F of the microphone 12 into a voltage V.
F/V converter 18a that converts into F/V converter 1
A/D converter 18b that digitizes the output voltage of 8a.
The output data of the A/D converter 18b is output as pitch information indicating the pitch of the vocal melody input to the microphone 12.

The output data of the A/D converter 18b is converted by the frequency-note converter 19 into a note number similar to the note number of the sub-code, and then supplied to the pitch difference detection circuit 17.

The difference obtained by the pitch difference detection circuit 17 represents the pitch difference between the pitch of the singer's vocal melody and the pitch of the basic vocal melody. However, pitch differences in octave units are excluded because there is no difference in pitch. The average value of this pitch difference information within a certain period of time is determined in the arithmetic circuit 20. This arithmetic circuit 20
The average value of the pitch differences obtained in step 1 becomes a control input for determining the pitch shift amount in the pitch adjustment circuit 11.

The pitch adjustment circuit 11 is configured to automatically adjust the pitch of a karaoke song by a shift amount corresponding to a control input.

According to the key controller according to the present invention having such a configuration,
The pitch of the karaoke song is determined based on the average value within a certain period of time of the pitch difference between the detected pitch obtained by detecting the pitch of the singer's vocal melody and the reproduced pitch obtained from the sub-chord of compact disc 1 during performance. The pitch will be automatically adjusted to match the pitch of the singer.

In the above example, the average value of the detected pitch difference within a certain period of time was calculated and the pitch of the karaoke song was automatically adjusted based on this average value, but the pitch difference was detected without calculating the average value. The pitch may be adjusted in real time according to the pitch difference.

In addition, it is not necessarily necessary to record the entire pitch information for one song as the pitch information of the basic vocal melody; for example, to check the pitch in a part of the header before singing, and to respond accordingly, it is necessary to record the pitch information at the beginning of the song, the so-called By recording only pitch information such as the chorus part or the highest pitch part of the song in the previous part of the song, and having the chorus sing by specifying the chorus part etc. in advance before starting to sing the song, the appropriate pitch can be determined. It is also possible to leave it activated. According to this, since a song is officially sung after the pitch is set, the pitch does not change during the song, and it is possible to automatically adjust the pitch to suit the singer.

As described in detail, the key controller according to the present invention detects the pitch difference between the detected pitch obtained by detecting the pitch of the performance sound emitted by the player and the reproduced pitch obtained from the recording medium during performance. The system detects this pitch difference and automatically adjusts the pitch of the performance song based on this pitch difference, so there is no need for singers to have to adjust the pitch themselves while singing, as in the past. This makes it possible to make intuitive adjustments that match the pitch.

[Brief explanation of the drawing]

FIG. 1 is a program diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing an example of the configuration of a MIDI ID board. Explanation of symbols of main parts 10... Disk player 11... Pitch adjustment circuit 12... Microphone 15...
Speaker 16... MIDI ID-da 17... Pitch difference detection circuit 18... Pitch detection circuit Applicant: Pioneer Corporation

Claims (1)

[Scope of Claims] A performance device that plays a recording medium in which pitch information of a performance piece and a performance sound corresponding to the performance piece is recorded; a pitch detection means that detects the pitch of the performance sound emitted by a performer; pitch difference detection means for detecting a pitch difference between a reproduced pitch obtained from the recording medium by the performance device and a pitch detected by the pitch detection means; and a pitch of a performance piece output from the performance device by the performance of the recording medium. and pitch adjustment means for automatically adjusting the pitch based on the pitch difference.