🚀 go-pugleaf

On Nov 30, 12:59 pm, Travis Garrison <travisgarri...@gmail.com> wrote:
> 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

then we might finally be able to actually measure the real benfit of
those Monster speaker cables or paper capacitors too..  :-)

Mark