[Bob Greschke]

Can you (i.e. is there a program) that can take two digitized copies of
a song from, let's say two different copies of the same album, compare
the waveforms and come up with one clean version of the song (pops and
clicks and general noise in one copy won't be in the other copy, yes?)?
If so, how about if they have already been MP3'ed and are not WAVs?

Thanks!

Bob

[Richard Crowley]

"Bob Greschke" wrote ...
Can you (i.e. is there a program) that can take two digitized copies of a
song from, let's say two different copies of the same album, compare the
waveforms and come up with one clean version of the song (pops and clicks
and general noise in one copy won't be in the other copy, yes?)?

http://en.wikipedia.org/wiki/Auto-correlation

If so, how about if they have already been MP3'ed and are not WAVs?

That would make it even more doubtful, especially if they were not
exactly the same source encoded into MP3 with exactly the same
parameters, etc.

[Don Pearce]

On Thu, 25 Oct 2007 17:28:51 -0600, Bob Greschke
wrote:

Can you (i.e. is there a program) that can take two digitized copies of
a song from, let's say two different copies of the same album, compare
the waveforms and come up with one clean version of the song (pops and
clicks and general noise in one copy won't be in the other copy, yes?)?
If so, how about if they have already been MP3'ed and are not WAVs?

Thanks!

Bob

Adobe Audition will do something with this.

Divide each into separate files of left and right. Now, take, say one
left side file of each. Record them both onto the same track - one on
the right channel and one on the left. You will need to do some
careful adjustment to make sure they are perfectly time-aligned from
start to finish. Now use the centre channel extraction tool - the one
provided for pulling a vocal out of a mix. This will emphasize
whatever is common between the two.

Now do the same thing for the pair of right channels.

Finally take the pair of cleaned up left and rights, and put them back
together into a stereo file.

There are easier ways.

d

--
Pearce Consulting
http://www.pearce.uk.com

[Matt Ion]

Don Pearce wrote:
On Thu, 25 Oct 2007 17:28:51 -0600, Bob Greschke
wrote:

Can you (i.e. is there a program) that can take two digitized copies of
a song from, let's say two different copies of the same album, compare
the waveforms and come up with one clean version of the song (pops and
clicks and general noise in one copy won't be in the other copy, yes?)?
If so, how about if they have already been MP3'ed and are not WAVs?

Thanks!

Bob

Adobe Audition will do something with this.

Divide each into separate files of left and right. Now, take, say one
left side file of each. Record them both onto the same track - one on
the right channel and one on the left. You will need to do some
careful adjustment to make sure they are perfectly time-aligned from
start to finish. Now use the centre channel extraction tool - the one
provided for pulling a vocal out of a mix. This will emphasize
whatever is common between the two.

Now do the same thing for the pair of right channels.

Finally take the pair of cleaned up left and rights, and put them back
together into a stereo file.

There are easier ways.

Audition has scripting support, doesn't it? You could probably script a
procedure like this. Wouldn't even be surprised if someone already had
a downloadable script for this.