Patent ID: 6148086
Filing Date: 2000-11-14
Classification: G10H,H04R

Abstract:
A method for merging a varying amount of an original lead singer vocals with an instrumental audio stream wherein said varying amount of said original lead singer vocals is dependent on a vocal-amplitude analog signal on a karaoke machine comprising:providing a first input channel and a second input channel;sensing said vocal-amplitude analog signal;converting said vocal-amplitude analog signal to a vocal-amplitude digital signal having a vocal-amplitude digital waveform;smoothing said vocal-amplitude digital waveform and thereby creating a smoothed exponential waveform including ramps and decays in said vocal-amplitude digital waveform; andadjusting the amount of said first input channel in output through an output channel relative to said second input channel according to the strength of said vocal-amplitude analog signal corresponding to said smoothed exponential waveform using a variable mixer to balance between said first input channel and said second input channel.