I've found that the melody often comes across when I didn't want it!

I'm using BIAB 2012, which may make a difference.

I use BIAB to produce jazz leadsheets, so the melody and chords are all there in the file, but for practice purposes I just want the accompaniment. On my laptop, I just "mute" the melody track, but if I save the song in the "BB2Go" folder, and generate the .mp4 file there, what's transferred to my iPad has the melody still present. I can then use Set.=>Volume=>Melody to "Off" on the iPad, and re-generate the mp4 file to get what I want.