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As of todays cvs (qtractor 0.1.2.911+) audio pitch-shifting makes its first appearance with the optional help from Chris Cannam's RubberBand library.

Pitch-shifting applies to audio clips only and its setting is accessible through the audio clip properties dialog (Edit/Clip/Edit...). Please note that this is very experimental stuff and shall have a better user interface in the future, at least for changing the pitch of an audio-clip in some intuitive way, just don't know what atm. :)

As the rubberband library also does time-stretching, one might want to keep use of the old internal WSOLA like algorithm borrowed and refactored from Olli Parviainen's SoundTouch library, which is 10-fold faster and quite effective for small time stretchings. That's why there's this new global configuration option (View/Options/Audio/WSOLA time stretching) which implies just that.

Cheers && Enjoy.
--
rncbc aka Rui Nuno Capela

P.S. this is NOT an April-fools prank.