[linux-audio-user] Time/pitch shifting software?
cannam at all-day-breakfast.com
Mon Dec 18 16:33:53 EST 2006
On Monday 18 Dec 2006 18:41, iain duncan wrote:
> Subjective opinions on which linux time/pitch shifting utility is the
> most usable for changing keys and tempo of music ( no voices )?
There are several LADSPA pitch shifters, some of which are of vaguely
musical quality (the TAP one, Steve Harris's better one, probably Tim
Goetze's PVOC Transposer although I don't seem to have that here at the
I couldn't think of a Linux application for interactive musical pitch
shifting -- guessing or being told the current key or pitch and
adjusting to a different key, rather than just twiddling a multiplier
in a LADSPA window. Atte's suggestion of Transcribe looks good.
For time stretching and studying a recording, Sonic Visualiser (mine) is
handy. The current Subversion trunk, which is fairly stable and will
turn into a new release soon, has a much better time stretcher than the
0.9 release (which can only slow things down and only in big steps).
It's a bit of a pain to build from Subversion, but it does work on
Windows and OS/X as well.
Rosegarden can also now do drag-to-fit time stretching using the same
code as SV. Again the feature's in Subversion only -- release soon.
Ardour has done the same thing for ages. I like Rosegarden's time
stretcher (a phase vocoder with phase locking at transients) better
than that in Ardour (or Transcribe), but it's much slower. Time
stretcher quality is very subjective though and I don't believe any of
these is really state of the art.
None of the above can guess the tempo and shift it to a different
specified tempo. Freecycle might be able to do that, though I don't
think it's really designed for it.
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