Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
If I import two tracks into GarageBand, split and cut so the song is together again, and export in AIFF, will there be any loss from the original lossless files? Say I import two separate apple lossless files, they have different bit rates. Would that be a problem (i dont think so)?

Bit rate means nothing when it comes to loss less formats.

I was going to suggest you do what you describe but it was not clear from your description exactly what the problem was. It what you need to do re re-cut then yes stick them all together them again.
 
Yeah, all I need to do is recut the song. I want absolutely no loss at all, so my question would be, does GarageBand cause loss at import, and does it cause loss at export in AIFF (is the algorithm reliable)?
So to recut, I would have to:
1. Import whole album in GarageBand
2. Cut songs, then export in AIFF.
Repeat.
3. Convert into Apple Lossless from iTunes.

Provided the files you put in are lossless and that you export in AIFF you will encounter no loss in quality.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.