CD player, simple pitch/tempo control

[philip]

I want to be able to change the pitch and/or tempo of music played on
a CD player. This used to be a fairly common facility with some cheap
CD players but is now difficult to find. Does anybody know how to do
this in a simple way? I wondered if the crystal oscillator in the CD
control circuitry could be replaced by a variable oscillator for
instance or maybe the existing crystal could be padded perhaps. I am
after a pitch/tempo swing of about +/- 15%. Any ideas greatly
appreciated.

Philip

 

[Martin Griffith]

I want to be able to change the pitch and/or tempo of music played on
a CD player. This used to be a fairly common facility with some cheap
CD players but is now difficult to find. Does anybody know how to do
this in a simple way? I wondered if the crystal oscillator in the CD
control circuitry could be replaced by a variable oscillator for
instance or maybe the existing crystal could be padded perhaps. I am
after a pitch/tempo swing of about +/- 15%. Any ideas greatly
appreciated.

Philip

If you want to do it in real time, somewhat difficult, but if it is
not realtime google for audacity or cooledit software, they have
pitch/tempo functions


martin

 

[philip]

If you want to do it in real time, somewhat difficult, but if it is
not realtime google for audacity or cooledit software, they have
pitch/tempo functions

martin

No, I want to do it real time with a portable CD player. Can it really
be that difficult? Its been done before with a ghetto blaster type
machine.

 

[donald]

No, I want to do it real time with a portable CD player. Can it really
be that difficult? Its been done before with a ghetto blaster type
machine.

Its not a matter of "if it can be done" its a matter of "can it be sold"

The manufacturers of older equipment tried something that did not sell well.

So they dropped it on the newest versions.

So, either search for what you want or use what you can get.

Your choice.

But complaining about "what should be easy" will do no one any good.

donald

 

[philip]

Its not a matter of "if it can be done" its a matter of "can it be sold"

The manufacturers of older equipment tried something that did not sell well.

So they dropped it on the newest versions.

So, either search for what you want or use what you can get.

Your choice.

But complaining about "what should be easy" will do no one any good.

donald

I'm not so much complaining but pointing out that since it was
possible to commercially implement such a function on a cheap machine
then it should be possible to do it as a one off exercise on one's own
CD player. I have looked everywhere for ideas as to how to do this in
practice but have, so far, drawn a blank.

 

[donald]

I'm not so much complaining but pointing out that since it was
possible to commercially implement such a function on a cheap machine
then it should be possible to do it as a one off exercise on one's own
CD player. I have looked everywhere for ideas as to how to do this in
practice but have, so far, drawn a blank.

Have you opened up your CD player to see what chips are inside ??

Again, its not "if it can be done", its a matter "if it can be done at
all" with the unit you have.

With out knowing what you have, this question can not be answered.

After knowing the unit you have and the chips inside, is still may not
be able to modify your unit.

Now if you want to re-engineer your unit......

donald

 

[JosephKK]

If you want to do it in real time, somewhat difficult, but if it is
not realtime google for audacity or cooledit software, they have
pitch/tempo functions


martin

It is available in better karaoke machines about 500 us$