Variable cd pitch by changing clock speed
 

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Possibly these crystals from the posts years ago have been replaced by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 wrote:
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.

Do you want to change the pitch, or just slow/speed up the tempo?

Travis Jordan wrote:
Mr Guy wrote:
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.

Do you want to change the pitch, or just slow/speed up the tempo?

Save yourself a lot of hassle and time - do it in software. Here is
just one product for the job. You probably can find some freeware
solutions if you look around.

http://www.bits.com/115173.html

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.

Variable cd pitch by changing clock speed
 

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.

"Mr Guy" wrote in message
m...
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.



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Variable cd pitch by changing clock speed
 

On Wed, 7 Jun 2006 14:09:19 -0400, "Steve W."
wrote:

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.

---
Would you elaborate on how easy it is to accomplish, please?


--
John Fields
Professional Circuit Designer

Variable cd pitch by changing clock speed
 

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.

--
Steve W.

"John Fields" wrote in message
...
On Wed, 7 Jun 2006 14:09:19 -0400, "Steve W."
wrote:

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.

---
Would you elaborate on how easy it is to accomplish, please?


--
John Fields
Professional Circuit Designer



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Variable cd pitch by changing clock speed
 

On Wed, 7 Jun 2006 21:37:07 -0400, "Steve W."
wrote:


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.

---
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?

--
John Fields
Professional Circuit Designer

Variable cd pitch by changing clock speed
 

John Fields wrote:
On Wed, 7 Jun 2006 21:37:07 -0400, "Steve W."
wrote:


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.

---
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.
--
ciao Ban
Apricale, Italy