I have downloaded 8 tracks of analog from a reel-to-reel recorder, through a digital interface, to GarageBand. All I want to do is take those 8 tracks to a commercial studio for mixing and mastering. How do I transfer the 8 tracks from GarageBand to a CD that I can take to the studio? Thanks

You will need to export out each track individually. Solo a track then go to Share > Export to Disc. Make sure Compress is unticked. This will save the file as an AIFF file. Once you have exported out all these tracks you can make a Burn Folder, move these tracks into the Burn folder and burn a disc with these tracks.

You will need to export out each track individually. Solo a track then go to Share > Export to Disc. Make sure Compress is unticked. This will save the file as an AIFF file. Once you have exported out all these tracks you can make a Burn Folder, move these tracks into the Burn folder and burn a disc with these tracks.