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Old 13th October 2002, 03:57 PM   #1
djdan is offline djdan  Romania
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Default Changing play speed for CD Player.

How can I change the play speed ( pitch ) for a normal home CD-Player ? I need something special : +60% .

Any help , link or sugestion , please !!!

Best regards !
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Old 13th October 2002, 06:17 PM   #2
sangram is offline sangram  India
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PC, lotsa shareware floating about on the 'net.
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Old 13th October 2002, 08:25 PM   #3
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Default +60% speed

Hi djdan,
Install a clock with 60% higher frequency.
If you want it variable make a clock with VCO. See application note 12 on though I doubt you can pull the crystalfrequency that much. Is it for dj use?
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Old 13th October 2002, 08:42 PM   #4
djdan is offline djdan  Romania
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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 !
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Old 14th October 2002, 12:07 AM   #5
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I have seen standard cd players fitted with an aftermarket added master clock oscillator module providing +/- 20% playback speed.
I doubt that the tracking and focus servos would cope with +60%

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