x42-Autotune

x42-autotune (aka fat1.lv2) is an auto-tuner based on Fons Adriaensen's zita-at1.

AT1 is intended to correct the pitch of a voice singing (slightly) out of tune. It works by resampling and looping the signal and does not include formant correction, so it should be used to correct small errors only and not to really transpose a song. AT1 can probably be used on some instruments as well, but is primarily designed to cover the vocal range.

The 'expected' pitch can be controlled by MIDI, or be a fixed set of notes.

The main differences to zita-at1 are that the LV2 plugin version reports its latency to the host, saves the state with the session and the MIDI input has sidechain semantics.