The USB port is used for MIDI, plus two-way communication with the PolyBrute Connect editor-librarian software, including firmware updates. The PolyBrute can be set to send and receive MIDI via the traditional 5-pin DIN ports, the USB port, or both.
Note: The USB connection does not stream audio to and from a computer.
Yes. It can sync to MIDI clock from, say, a DAW, sequencer, drum machine, or other synth. This can happen via the USB or DIN ports. You can make this setting manually, or it can auto-detect an incoming clock signal and sync up. It can also sync via the analog sync jacks mentioned above.
You can assign each pedal to different destinations by pressing the Settings button, then numeric button 3 for Expression Control, then 6 or 7 for either pedal.
Six of the options for each pedal are the same: Master Filter Cutoff; the X, Y, and Z axes of the Morphée controller; the ribbon controller; and the modulation wheel. The seventh option is Volume for Exp pedal 1 and a source in the modulation Modulation Matrix for Exp pedal 2.
Yes. You can also reverse the polarity of either expression pedal, so that pressing the pedal further down decreases the value. Press Settings, then 8 (Misc.), then 7 (Pedals) to access these settings.
Note: By default, this setting is set to Auto, which automatically detects your pedal polarity on power-up.