Currently the Matrixbrute sends 14 bit MIDI CCs through the mod (and pitch?) wheels. Some hardware modules, such as the Novation Peak, interpret the added bits (CC 33) as a separate control message and thus do not respond properly to expression from the Matrixbrute. It would be fantastic if an option was added in the MIDI control center to restrict the wheel signals to their traditional 7 bit CCs, which would make the Matrixbrute a much more versatile and appealing controller for other synths.
