Auto Tune

Do you believe in tune after all?


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.



User Interface

The control knobs respond to mouse click and mouse-drag movements:

The Ctrl key allows for fine-grained control when dragging or using the mouse-wheel on a knob.

Hovering the mouse over label below a control displays a tooltip with information.

Operation Modes

AT1 re-tunes the input signal to the note closest in the configured scale. The scale consists of up to 12 notes (1 octave), which are set and indicated on keyboard on the left side. By default all 12 are enabled.

Left-click allows to en/disable individual notes, and right-click on the keyboard brings up a dialog to select common major/minor scales. The keyboard also indicate the current note as selected by the pitch estimator.

The following operation modes are supported: