I've tried the auto chord feature with a number of mp3 songs and can't really get it to work (just tried it again with Build 3). I purposely selected early Beatles songs with simple chords. After telling the program where the first bar is, the only thing it seems to be able to do is find the key it's in. But most of the chords are wrong. I tried "Long Tall Sally," which is made up of only three chords, and the program came up with about 15 chords, almost all of which were wrong. I can't imagine what would happen with more complex songs. Is there something I'm doing wrong?