What do you mean the keyboards' playback?
You can connect up midi in and out of your interface to the keyboards midi in and out, and send the backing, so that the sounds being played are your keyboards sounds. That's easy-just set the midi drivers in BIAB to midi in and out mpu 401. No need for midi commands like start, stop etc--you are not syncing the keyboard, or using it's sequencer-you are just using it's tone generator to make the sounds. |