Klarinet Archive - Posting 000244.txt from 1997/10

From: Mark Charette <charette@-----.com>
Subj: Re: MIDI
Date: Wed, 8 Oct 1997 14:28:10 -0400

Ryan Lowe wrote:
>
> Until you know everything about the situation, wait to make accusations.
> Have you ever heard of a CD Burner? You can buy them at most computer
> stores. If you then go to an electronics store, you can buy yourself a
> microphone. The combination of these two things and a computer can enabel
> any idiot to make a cd of him/herself. You do not need to be a pro to be on
> a cd, all you need is a love of computers.

Ryan - you asked to load a CD into the computer and alter the parts.
It is well-nigh impossible to do a frequency discrimaination of all
possible combinations of instruments and decompose them into parts.
We can run a DFT and tell you the amplitude of the frequencies over
time, but we cannot get the parts back out.

It is analagous to getting the juices separated from a glass of V8
juice, but in this case we have 80 or more juices, and four of the
juices from different varieties of tomato, 3 of carrot, etc.
We don't have the practical technology (yet) to separate them back
out.

If you meant to alter as in timing and/or frequency of the piece; yes,
that is possible and is trivial to do (via playback speed and
resampling). Most WAV editors allow you to do this.

If you want to do this and have about 500Mb available on a hard disk,
you can record the CD off an attached CD player and store it on your
hard disk for replay as a WAV file (I do this once in a great while)

--
Mark Charette, MIKA Systems, Inc., charette@-----.com
">>As far as I can tell, no."
">Fortunately, this is not correct."
"Proving once again that ... the best way to extract useful infor-
mation is to post wrong information." - Roger Glover, F90 mail list