As an update, the RB pitch tool has worked better than anything I've tried so far, did the gold wave thing awhile back, but that was no better than anything else I've tried.

Do hardware karaoke players have a more advanced key changer function, the CD+G tracks that I've heard in karaoke bars etc, just don't seem to sound that bad, even at 2 to 4 semi tones.

But PG has done very well with the RB pitch shifter, works as well as anything I've tried, and it's built in.

Thanks PG