Automatic melody following method and system of music accompanying device

Abstract

The invention discloses an automatic tone adjustment method and system of music accompaniment device and adopts the following technical proposal: a tone estimator is used to calculate the basic frequency of the sound of a user at preset intervals; inside a musical scale sequence recorder, the basic frequency of the sound of the user is converted into a user musical scale sequence to be recorded; a musical scale matcher compares the difference of the user musical scale sequence and a preset music score theme musical scale sequence in a mode similar to dynamic time distortion or calibration; in addition, a transposition judgment device is adopted to determine the transposition and transposition time of accompaniment music; if transposition is needed, the musical scale parameter in a music synthesizer is adjusted automatically; finally, the music synthesizer synthesizes the music score recorded digitally into actual music waveform which is output along with the singing of a user through an audio mixer and a loudspeaker. Therefore, a music accompaniment device can automatically adjust the tone of an accompaniment song according to the tone of a singer.

Description

technical field [0001] The invention relates to an automatic tuning method of a music accompaniment device and an innovative design of the system. Background technique [0002] When ordinary people sing with musical accompaniment (such as a singing machine), they tend to lose pitch because the pitch of the accompaniment music is too high or too low. The incongruity between the singing voice and the music voice will greatly affect the singing effect. [0003] In view of this, although relevant technical personnel have developed a device that can allow the music accompaniment device to change the pitch of the accompaniment music with the pitch of the singer's singing in response to the above problems; time period, and then obtain the "average pitch" of this time period through calculation, and then compare the "average pitch" with a reference pitch of a matching accompaniment music to provide a mismatch signal, and then change the pitch of the accompaniment music; however , ...

AI Technical Summary

Problems solved by technology

[0002] When ordinary people sing with musical accompaniment (such as a singing machine), they tend to lose pitch because the pitch of the accompaniment music is too high or too low. The incongruity between the singing voice and the music voice, which greatly affects the singing effect

[0003] In view of this, although relevant technical personnel have developed a device that can allow the music accompaniment device to change the pitch of the accompaniment music with the pitch of the singer's singing in response to the above problems; time period, and then obtain the "average pitch" of this time period through calculation, and then compare the "average pitch" with a reference pitch of a matching accompaniment music to provide a mismatch signal, and then change the pitch of the accompaniment music; however , the automatic tune-up method of this kind of existing music accompaniment is to get the pitch of a period of time cycle to calculate and obtain an average value (being average pitch) for the calculation of singer's singing pitch, so, the time to obtain an average value each time The point interval (such as 5 seconds) has already caused the situation of producing obvious delay on the comparison, if adding the time required for calculation and comparison, the situation of delay will be more obvious. Therefore, the automatic following method of this existing music accompaniment In practical application experience, it is found that the process of changing the pitch of the accompaniment music to match the pitch of the singer cannot achieve better real-time performance, and often has to wait for the singer to finish singing a line of lyrics, and then the music pitch will be achieved when the next line of lyrics is in progress. and the above-mentioned existing method is a comparison of two fixed-point values, and it is difficult to obtain a high-accuracy transposition value. This is obviously not enough to meet the most anticipated needs of users, and there is room for further improvement and breakthrough.

Images