Disklavier

On Tue, 18 Nov 2003, playerkenn wrote:
> http://www.digital-ear.com
> Here is another one to try. Hopefully a good version can be found to
> capture all that is recorded other than on rolls.

As Midimagic says, this is really a fantasy. This kind of task is
extremely difficult and is the subject of much research. Nobody really
knows how the human ear can identify all the different notes and
instruments that are playing at any one time in a piece of music which
makes it quite hard to try and model.

Some approaches work to a degree, but not very well yet. If you have a
relatively good model of each instrument you can analyse the frequencies
present to work out which notes are playing, but this is hard. You can
also perform things like independent component analysis, but this is
really only any good for separating out individual parts from a mix and
requires you to know how many signals were used to begin with.

Sadly, it isn't going to happen any time soon. The best way to capture
performances from audio recordings (at the moment) is to sit there and
transcribe them.

James