Old post, but in case somebody is still wondering, I've got a Volca Beats connected to the BSP via a MIDI cable (default drum channel 10 on both) and the BSP is connected to my Mac running Ableton via USB. Just send stuff to channel 10 in Ableton — works without a hitch. I didn't have any free MIDI outs elsewhere so this saved me from spending on a MIDI splitter :-)
According to a Sonic Lab video, you can actually use any cheap miniplug splitter to get multiple MIDI outs from the BSP!