Methods and apparatus for use in sound modification

Abstract

The digitized audio signal (310), such as an amateur concert, and the digital guide audio signal (312) are provided to a time alignment process (320) that produces a time aligned new signal (330) time aligned with the guide signal. In processes (340) and (345), the tones along the time-aligned new signal (330) and along the guide signal (312) are measured, and in processes (340) and (345), these measurements are provided to the tones The tuning calculator (370) calculates the pitch correction factor C(Fp) from these measurements and the nearest octave ratio of the signal. A pitch change process (380) modulates the pitch of the time-aligned new signal (330) to produce a time-aligned and pitch-adjusted new signal (390).

Description

technical field [0001] The present invention relates to signal modification. More particularly, but not exclusively, the invention relates to problems arising in modifying a digitized sound signal based on features in other digitized sound signals, wherein corresponding features of a first sound signal and a second sound signal are in each Signals do not appear at the same relative position in time. Background technique [0002] It is notoriously difficult to speak or sing along with audio or audio / video segments such that the new performance is exactly synchronized repetition of the original actor or singer's words. Therefore, it is very unlikely that the recording of a new performance will have its beginnings and details of the acoustic properties synchronized with the original audio track. Similarly, features such as a new singer's pitch may not change as precisely or as intricately as the original singer. There are many situations in the professional audio recording i...

AI Technical Summary

Problems solved by technology

Such a system can go out of scale, causing e.g. a karaoke singer's vowel to match the wrong part of the guide's target singing

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