Patent ID: 8847056

Claim:
A time-aligned audio system for harmony generation, comprising: a chord detection circuit configured to receive and analyze an accompaniment audio signal in a first duration of time and to determine chord information corresponding to a chord of the accompaniment audio signal; a harmony processing circuit configured to receive and analyze the chord information and a melody note received from a singer, and to produce a harmony signal harmonized to the chord of the accompaniment audio signal and the melody note, the harmony processing circuit being configured to transmit the harmony signal to a loudspeaker to produce harmony audio; and a delay circuit configured to receive the accompaniment audio signal, and to store the accompaniment audio signal in memory for a predetermined delay time, the delay circuit being configured to stream the accompaniment audio signal to the loudspeaker after the predetermined delay time has lapsed to produce accompaniment audio, wherein the predetermined delay time approximates the first duration of time.