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The vocal eliminator is a device for removing vocals from stereo audio. It would typically be used for karaoke applications (sing along with pre-recorded accompaniment music). The technique for this audio trick is not new and involves using phase cancellation to remove vocals, which are usually recorded with equal level on both Left and Right channels. For this reason, stereo audio is required. Mono recordings or only Left or Right channels will not work.
A Fine Tune control is provided for those instances where the Left and Right channels are not properly time-aligned, such as when a tape head is misaligned. This error in the recording can ruin the whole effect. The Fine Tune is the Delay Time in samples ('z'=Audio Samples). The delay time is expressed in samples to allow the finest control of the delay.
Note: This algorithm will not remove a multi-mic choir from a recording.