GarageBand for Mac: Share songs to iTunes
You can share a song to your iTunes library to play in iTunes, add to a playlist, or sync to a mobile device such as iPhone or iPad. Songs can be shared to iTunes as uncompressed AIFF audio files or as compressed audio files with various quality levels.
Share a song to iTunes
Choose Share > Song to iTunes.
In the Share to iTunes dialog, do the following:
If you want to rename the shared file, select the name in the Title field, then enter a new name.
Enter artist, composer, and album information for the shared file in the respective text fields.
Tip: You can also add these tags in My Info preferences.
Choose the quality level for the shared file from the Quality pop-up menu.
By default the entire song is shared. Any silence at the beginning or end is trimmed. To share only the cycle area, or only selected regions (if there is no active cycle area), select the “Export cycle area only, or length of selected regions” checkbox.
The shared song appears in the iTunes library, where you can add it to playlists, convert it, or burn it to a CD. The format of the shared song is determined by the iTunes import settings.