Vocal processing with accompaniment music input

摘要

Systems, including methods and apparatus, for generating audio effects based on accompaniment audio produced by live or pre-recorded accompaniment instruments, in combination with melody audio produced by a singer. Audible broadcast of the accompaniment audio may be delayed by a predetermined time, such as the time required to determine chord information contained in the accompaniment signal. As a result, audio effects that require the chord information may be substantially synchronized with the audible broadcast of the accompaniment audio. The present teachings may be especially suitable for use in karaoke systems, to correct and add sound effects to a singer's voice that sings along with a pre-recorded accompaniment track.

主权项

1. A time-aligned audio system for harmony generation, comprising:
a chord detection circuit configured to receive and analyze an accompaniment audio signal and to determine chord information corresponding to the accompaniment audio signal; a harmony processing circuit configured to identify errors in the chord information, to determine a chord of the accompaniment audio signal while ignoring the errors, to produce a harmony signal harmonized to the chord of the accompaniment audio signal, and to transmit the harmony signal to a loudspeaker; and a delay circuit configured to store the accompaniment audio signal in memory until the harmony signal is transmitted to the loudspeaker, and to transmit the accompaniment audio signal to the loudspeaker substantially simultaneously with the harmony signal; wherein the errors in the chord information are chosen from the set consisting of short-term chord changes lasting less than a predetermined amount of time, sequential key changes, and sounds produced by percussion instruments.