Just ran into this today - it allows for incredible stretching of audio tracks, lengthening them by factors of 20X on up. What is a punchy drum beat driven song becomes a pastoral sonic landscape.
Here is the website for Paul's Extreme Sound Stretch
From the Introduction:
This is a program for stretching the audio. It is suitable only for extreme sound stretching of the audio (like 50x) and for applying special effects by "spectral smoothing" the sounds. It can transform any sound/music to a texture. The program is Open-Source and it's released under the version 2 of the General Public License. You can download the source code for Linux or the Windows binaries.
Please note that this is suitable only for extreme time stretching (e.g. if have a melody of 3 minutes and you want to listen it in 3 hours). If you want "less extreme" time stretching, you can use a program which contains the SoundTouch library.
Here is how to use it as a plug-in in Audacity
Very cool stuff - my immediate thought was to process some thunder and stream/waterfall/surf recordings I have on file...
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