REPEATS: The "REPEATS" knob feeds signal from the output of the delay line to the input. This control allows for a single repeat all the way to self oscillation.
TIME: The "TIME" knob allows for a wide range of delay times, ranging from around 60ms all the way up to over 600ms max time.
MIX: The "MIX" knob is traditional in the way it mixes into your dry path the amount of echo you want. What is not traditional the amount of boost it permits you to add... So many echo pedals out there can barely tune the repeat to unity with the gain. This is not at all the case with the Montavillian Echo! You can make your repeats much louder than the dry signal. This comes in really handy for short repeats for a dramatic doubling effect as well as self oscillation freak outs.
CUT: The "CUT" knob is a really neato control that I haven't seen before on an echo. It's function is to sweep from about 400Hz to about 1500Hz, lowpass filter... When the knee sweeps to the high side it gives a nice little bump in the mids right before the subtle fall off. Tuning this knob allows you to sweep from old school BBD dark filtering to a clear repeat. It gives you the power to adjust your echoes so that they sit in the mix perfectly against your dry signal. This control also functions to EQ the tonality of self-oscillations.