🚀 go-pugleaf

On Nov 30, 9:30 am, zvo...@gmail.com wrote:
> Is there a way that a mono recording, (i.e. the Beatles), can be
> separated to isolate separate instrument/vocals and then apply Auto-
> Tune/pitch correction or other fx?
>
> Is it that it would take a lot of tech knowledge to execute this or
> has something like this reached the point of just making the right
> adjustments in a program like Cakewalk, Pro Tools, etc.?
>
> Thanks.

As others have mentioned, this is not a trivial process - certainly
nothing commercially available can accomplish this task.  However,
this sort of audio extraction has been a research topic for the past
couple of years, with some promising results.

At the International Computer Music conference in Miami a few years
back, I recall attending a paper session discussing this exact topic.
The researchers took on the task of separating out the two instruments
from a Mozart piano/violin duet.  As this was a piece with a readily-
available score, the researchers knew in advance which pitches and
rhythms were present in each instrumental part.  The extraction was a
matter of synchronizing a MIDI score with the audio recording, and
using that as a guide to perform selective FFT bin extraction.  In
this case, separating the violin from the piano met with marginal
success.  The difficulties lie when the two instruments occupy the
same frequency range.  An FFT analysis will give you frequency content
over time, but cannot distinguish whether a certain frequency bin
originated with piano or violin.

The resulting extracted instruments were recognizable, but both
suffered from washy FFT resynthesis artifacts.  But still impressive.
Give it a few more years and I'm sure someone will crack this problem.

Travis Garrison