GarageBand Audio Formats: What to Use and Why

GarageBand is used by beginners and professionals alike. Understanding which audio formats it accepts and how to export properly will save you frustration and protect the quality of your work.

What GarageBand Stores Internally

GarageBand projects are stored as .band files (on Mac) -- a package bundle containing audio samples, MIDI data, and project settings. These are not audio files you can share directly.

Importing Audio Into GarageBand

GarageBand on Mac accepts:

WAV (recommended for samples and loops)

AIFF (Apple's equivalent of WAV)

MP3 (fine for reference tracks and imported loops)

M4A / AAC (works for imported loops and reference)

FLAC -- not supported natively. Convert to AIFF or WAV first.

For samples and loops you plan to pitch, stretch, or process heavily: use WAV or AIFF. For reference tracks: any format works.

Converting FLAC for GarageBand

If you bought a sample pack in FLAC and GarageBand will not import it, convert to WAV using AudioUtils. The quality is identical -- both are lossless -- and GarageBand will accept the WAV version without issues.

Exporting From GarageBand

On Mac: Share > Song to Music / Disk / SoundCloud. The options:

• AIFF: Uncompressed, lossless. Recommended for master files.
• MP3: Choose 320 kbps for distribution quality.
• AAC/M4A: 256 kbps is Apple Music quality.
• Apple Lossless (ALAC): Lossless in the M4A container. Good for Apple-centric sharing.
• WAVE: Same as AIFF quality. Use if recipient is on Windows.

Recommended Export Workflow

For a finished song: 1. Export AIFF as your master file -- keep this forever 2. Export 320 kbps MP3 for sharing with friends, social media, SoundCloud 3. Export 256 kbps AAC/M4A for iPhone and Apple device use

GarageBand on iPhone

iPhone GarageBand export: tap the My Songs browser, hold the project, tap Share > Song.

• Uncompressed: Exports as AIFF. Large file but perfect quality.
• Compressed: Exports as M4A/AAC at 256 kbps. Good quality, much smaller.

For casual sharing from iPhone, M4A is fine. For professional use, export Uncompressed and do any further processing on Mac.

Audio Quality Within GarageBand Projects

GarageBand records at 44.1 kHz / 16-bit by default on iPhone and 44.1 kHz / 24-bit on Mac. The Mac version's 24-bit recording gives you more headroom and detail -- valuable for recording instruments and vocals.