Re: [linux-audio-user] Time/pitch shifting software?

On Monday 18 Dec 2006 18:41, iain duncan wrote: 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 moment). 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. Chris