I also am new to this, the manual says that youn can use the mixer to adjust the volume of different parts, and certainly some posts from advanced users indicate that this can be done quickly even during perfromances between numbers. BUT I can't get mine to work-------i set the mixer parts ( parts A9 and a10 ) drums. to a low volume but as soon as i start playing they come back to full volume ----suspect the thing is faulty.