I’ve struggled with Earl’s question, as well. Tried the mp3 route via mp3 players and set lists. Heck, I even go back to the cassette days----playing tracks on that medium. Talk about a trick staying in tune! I’ve decided that despite the hassle of taking a laptop to a gig, having a stand for it, the wires, and all the rest----BIAB still sounds best being played live. Plus, you’ve got your folders with tunes that might be requested. Also, you get the advantage of seeing the chords go by for soloing and the bar lyrics (altho’ way too small) for vocals. For me, it just works better that way. And, with the laptop, I can make quick adjustments for the bass, drums, etc. if any instrument is out of balance. That happens often, despite my best efforts to mix everything at a constant level. Across all the midi and Real Track styles, I’ve found a lot of variance in volume levels. You just can’t set the bass, say, at 90 and expect it to be right for each song.