Two frequencies for the reference tone: 440 Hz to 432 Hz
Endorphin.es Autopilot Introduction
Endorphin.es Autopilot silver is a tuner module for modular synthesizers in Eurorack format. The module has two tuners that tune oscillators very precisely to the note "A". Simply connect the module's "Drop Out" jack to the VCO's 1V/Oct input and connect any waveform output to the tuner module's reference input (Tune In). If a keyboard or sequencer is connected to the module's key input and the tuner button is pressed, the oscillators will tune to "A". If you press the Tuner button longer, the reference tone can be shifted from 440 Hz to 432 Hz.