Method and apparatus for replacing a voice with an original lead singer's voice on a karaoke machine

A vocal and instrumental merging karaoke machine comprising:

• means for providing a first input channel and a second input channel;
• means for sensing a vocal-amplitude analog signal;
• means for converting said vocal-amplitude analog signal to vocal-amplitude digital signal having a vocal-amplitude digital waveform;
• means for smoothing said vocal-amplitude digital waveform thereby creating a smoothed exponential waveform including ramps and decays in said vocal-amplitude digital waveform;
• and
• means for adjusting 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.

A vocal and instrumental merging karaoke machine comprising:

• a first input channel and a second input channel;
• a vocal-amplitude analog signal sensor;
• a vocal-amplitude analog/digital signal converter for converting a vocal-amplitude analog signal to a vocal-amplitude digital signal having a vocal-amplitude digital waveform;
• an amplitude follower for smoothing said vocal-amplitude digital waveform and thereby creating a smoothed exponential waveform from ramps and decays in said vocal-amplitude digital waveform;
• and
• a channel-output adjuster for adjusting the amount of said first input channel output through an output channel relative to 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.