liebrecht@xxxxxxxxxxxxxxxxxxxx wrote: > Bitwig absolutely requires to have exclusive access to a USB pad Controller ALSA has two MIDI APIs. The low-level RawMIDI interface gives low-level access to the raw bytes going over a port, and usually allows only exclusive access. The sequencer interface deals only on messages, allows user-space programs to create their own ports, and allows multiple connections per port. When a sequencer port corresponding to a hardware port is opened, the RawMIDI port is also opened and thus blocks other accesses. Apparently, Bitwig uses the RawMIDI interface. Try loading the snd-virmidi module (which creates a virtual sound card), and tell Bitwig to use that. You can then connect its sequencer ports to whatever hardware or software ports you like. Regards, Clemens
