external pitch control mod for cd player - diyAudio
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Old 16th November 2008, 07:04 AM   #1
amc32 is offline amc32  United States
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Join Date: Mar 2008
Default external pitch control mod for cd player

May seem odd,but could come in handy.Seems alot of people here in the south (Florida) have become accustomed to playing music at slower speeds.
Variable speed control on motor?
Processor Mod.??

Need input!
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Old 16th November 2008, 07:23 AM   #2
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do you mean the songs like tommy mckinnie uses?most ppl just uses software to slow them down and than burns them to a disc.i've used audacity you can slow them down,add bass or about anything you want to. http://audacity.sourceforge.net/
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Old 16th November 2008, 02:40 PM   #3
ppia600 is offline ppia600  United States
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Ask DJ screw, lol
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Old 19th November 2008, 08:44 AM   #4
dangus is offline dangus  Canada
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Location: Vancouver Island
With oldschool CD players you could change a clock crystal, or inject a signal from a variable frequency source. I tried that with my old Philips CD-150 deck, and it worked (using fixed crystals). Elektor magazine published plans for a variable frequency source for pitch-controlling CD players; it looked useful, but by the time I came across the article the PC board and EPROM were no longer available.

These days, the smart thing would be to just use a laptop, or get a cheap DJ CD player. Or a DJ add-on for an iPod.

But, if you like messing around, get a cheap/old CD player, build some kind of variable frequency oscillator and substitute that for the crystal oscillator.

The only external mod I can think of would be a gizmo that changes the pitch without changing the tempo, like some karaoke processors have.
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Old 19th November 2008, 10:48 AM   #5
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My old CD player used to drag. I guess it had a crystal out of tolerance. That explains a lot.
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