Hi, Can two musicians who both have GarageBand collaborate on the same song by exchanging the files back and forth to each others computers? As an example, if someone lives in Florida and someone else is in California, can the person in Florida create a drum pattern and a bass track, send the project to the person in CA, they add keyboards and send it back, and the person in FL then adds guitar? Can this be done at the track level? Can the person in FL create a drum track, bass track, and guitar track, send it to the person in CA, and will the person in CA be able to edit the tone of the guitar or bass, change the volume levels, etc... add their keyboard part and send it back to FL? Thanks!