Variable cd pitch by changing clock speed

[Mr Guy]

I am interested in modifying one of my cd players, so that i can
adjust the pitch of the music played by it. I have read various other
posts on this subject, but all are over 10 years old.

Please do not post providing information on the various types of cd
players for sale with this function built in, I already know and dont
care.

I am aware that this is not just a matter of changing the rotational
speed of the cd. But a high school physics and general interest in
electronics background has allowed me to realise that it cant be to
hard to change the speed of the clock that cd players use to sample
the music by.

A previous post suggested that this "clock" was created by a crystal
oscillator, although when i ripped my old cd player apart, i couldnt
see anything that might be a crystal, although i dont really know what
it would look like. (obviously not a little rock in the cd player)

Possibly these crystals from the posts years ago have been replaced by
an IC???

Can anyone verify this, and give me details about different clock ICs,
or anything else that may help me.

Was thinking about using a variable frequency oscillator as input into
the place where the clock/timer was. Uhhm, but yeh, any suggestions?

 

[Mr Guy]

i would like to change both the pitch and the speed, as theyre
directly related.
i am interested in this so that i could buy some cheap discmans, and
have a control to speed them up or slow them down, so that i can match
the tempo of different songs.
I know i could do this by computers, but would rather do it this way.

 

[Steve W.]

They are only directly related if you are using speed control on tape or
vinyl.
Both are independent for any other use. It is very easy to sped up a
song while keeping the pitch the same or to vary the pitch at the same
speed setting. If it wasn't over half of today's "artists" would be out
of work due to singing off key and off tempo.

 

[Steve W.]

Variable clock speed controls during either playback or recording allows
the speed of conversion to be altered to control tempo. To vary pitch
you need to play with the audio waveform in real-time. Frequency
conversion up/down allows the pitch to be altered. Use both and you can
have Frank singing My Way in Mickey's voice with the song playing at the
original speed. Or you can have Franks voice stretching the song out a
couple minutes. Take a loot at a modern mixer panel and you will find
lot's of toys to "shape" the tone and tempo of the inputs and allow
everything to work.

Even a SoundBlaster card has the parts and software to handle it. Take a
look at the environmental sound adjustments sometime.

 

[Ban]

---
OK.

Let's say that I wanted to take a recording of Nancy Sinatra's
rendition of "These Boots Are Made For Walkin'" and make it sound
like her dad sang it.

How would I go about doing that?

Get Adobe Audacity, load the song, click Effects/Time Shift/Stretch, choose
Streching Mode: Pitch Shift(preserves Tempo), click "preview" and adjust the
strech% slider to the desired value. Click "OK" and wait 35 seconds. You are
done.