I suspect the problem is that the audio file actually starts at the beginning of the song, and you can't move it back before the beginning of the file. Instead, I would probably load everything into RealBand (just select the BIAB file; it should also pick up the associated audio file). Then, you can instead cut out however much you want from the (most likely) silence at the beginning of the file and then slide the audio content to the left by that amount. Listen to it to make sure everything lines up. Save it back as a BIAB file (you may have to export that audio file with the same name as the BIAB file; not sure). Be sure to use different file names so as not to overwrite anything important.

Just a thought.


John

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