Brought my programmable BDDI to practice for the first time today. I discovered a great use for the multiple channels. As your venue changes, you'll have to make adjustments to the room/system, no problem. But, say I roll back the bass a bit. Fine, but then I switch channels, and switch back, it would revert to where it was. So, since I really only use two channels, clean and overdrive, the third will be my designated 'floater' where I can save those adjustments. Now I have my basic sound, an adjusted channel, and the od.