??? ???? ??? ??? ? ??? ???? ??????. ?? ? ??? ???/?/?? ??? ??? ?? ? ????. ?? ???? ?? ??? ???? ???? ????? ?? ????? ? to have the quasi-karaoke (mono) keep track of, the remaining channel of the original audio is subtracted from the proper channel. The Sega Saturn also includes a "mute vocals" feature that relies on the same basic principle and is l

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