Paul's Extreme Sound Stretch

Paul from ZynaddsubFX has written a great tool that is suitable for extreme sound stretching of audio (like 50x) and for applying special effects by “spectral smoothing” the sounds. It can transform any sound/music to a texture.


  • It produces high quality extreme sound stretching. While most sound stretching software sounds bad when trying to stretch the sounds a lot, this one is optimized for extreme sound stretching. So, the stretch amount is unlimited
  • You can play the stretched sound in real-time (including the possibility to “freeze” the sound) or you can render the whole sound or a part of it to audio files
  • Support for WAV and OGG VORBIS files
  • It is a Free Software

Here are the results of some tests I did on the default 8.04x stretch.
The original sound and the stretched sound

Material with drums and percussion came out a bit hissy, but you might find use for that I guess (my result sounded a bit spooky).
Compare the original beat with the stretched one

Cool stuff! Check out Paul’s Extreme Sound Stretch page for more information.