Volante has 4 playback and 4 feedback buttons that are used to select which of the playback heads are active which will be feeding back to the record head.
When in standard operation, Volante has 4 playback heads, each of which can be enabled or disabled with their corresponding playback buttons.
Each playback head has a corresponding feedback button which determines if the signal from the head will fed back to the record head.
The SPACING knob is used to adjust the spacing between the playback heads. Turning the knob morphs the heads between the noted even, triplet, golden ratio, and silver ratio settings.
Here are some examples to help with using the playback and feedback buttons (with the SPACING knob set to even):