Changing play speed for CD Player.

Thank you for answere !

I don't want to make variable. I want to make a master CD-player for a cassette duplication sistem wich use normal home cassette recorders with some change at tape speed. It is a school project for my brother.

Why 60% ? Becouse is the good compromise speed/sound quality, using non-pro equipment.

When you say clock , do you mean 70 Khz ?

Regards !