SoundTouch
The SoundTouch Library Copyright © Olli Parviainen 2001-2012 SoundTouch is an open-source audio processing library for changing the Tempo, Pitch and Playback Rates of audio streams or audio files
- Tempo (time stretch): Changes the sound to play at faster or slower tempo than originally without affecting the sound pitch.
- Pitch (key) : Changes the sound pitch or key while keeping the original tempo (speed).
- Playback Rate : Changes both tempo and pitch together as if a vinyl disc was played at different RPM rate.