Engine credits

Independent pitch and tempo: Signalsmith Stretch (MIT). Faust reverbs: Zita / Julius O. Smith, Dattorro / Jakob Zerbian, Freeverb / Romain Michon. MP3 encoding: lamejs 1.2.1 (LGPL-3.0), served from this website’s own files.

Download effects engine source and licenses

BPM and key analysis are independent FN prototypes. Loudness measurement is an independent implementation based on ITU-R BS.1770. These meters are not certified compliance tools.

MP3 encoder: lamejs source, based on LAME. Encoder notices · LGPL license · GPL license. The local encoder file is unmodified and replaceable.