I'm trying to sync my TB-303 to midi with the Din Sync outs of the Beatstep Pro. It seems to sync up well when using the BSP's internal Clock. However, when I do it via USB the Din Sync is running at half time. I've looked through the manual and tutorials and can't seem to find anything. Also, I am getting ridiculous ground hum when using the Din Sync output in to the TB-303(I am using the splitter too). Any suggestions on how to fix this ?