Quick Verdict
Use AIFF when…
Use AIFF for professional audio production: recording, mixing, mastering, and archiving in macOS-centric workflows. AIFF is lossless — every sample value preserved exactly. Logic Pro, Pro Tools, and GarageBand work natively with AIFF.
Use AAC when…
Use AAC for distributing finished audio: Apple Music streaming uses 256 kbps AAC. iPhone, iPad, and Mac all play AAC natively. For sharing music, podcasts, and audiobooks, AAC at 256 kbps is virtually indistinguishable from lossless on consumer equipment.
AIFF vs AAC: Feature Comparison
| Feature | AIFF | AAC |
|---|---|---|
| Audio quality | Lossless (perfect PCM) | Lossy (near-transparent at 256 kbps) |
| File size (1 min stereo) | ~10 MB (44.1 kHz/16-bit) | ~2 MB at 256 kbps |
| DAW editing | Ideal — native in Logic Pro | Not recommended — convert to AIFF first |
| Apple Music | Imported but not used for streaming | Native streaming format |
| iOS/iPadOS support | Yes | Native |
| Android support | Requires app | Native |
| Best for | Production, archiving, editing | Distribution, streaming, mobile listening |
When AIFF wins
- ✓Audio quality: Lossless (perfect PCM)
- ✓File size (1 min stereo): ~10 MB (44.1 kHz/16-bit)
- ✓DAW editing: Ideal — native in Logic Pro
When AAC wins
- ✓Audio quality: Lossy (near-transparent at 256 kbps)
- ✓File size (1 min stereo): ~2 MB at 256 kbps
- ✓DAW editing: Not recommended — convert to AIFF first
Frequently asked questions
Should I master in AIFF and distribute as AAC?
Yes — this is the standard workflow. Record and mix in AIFF (or WAV) for maximum quality and editing flexibility. When the master is finished, export AAC at 256 kbps for distribution (streaming platforms, Apple Music, iTunes). Keep the AIFF master for re-releasing or re-mixing later. This two-format approach is used by every professional audio workflow.
Can you hear the difference between AIFF and AAC 256 kbps?
In controlled double-blind ABX tests, most listeners cannot reliably distinguish AAC at 256 kbps from lossless audio on consumer equipment (standard headphones, home speakers). Trained audio engineers may detect differences on specific content (cymbals, subtle harmonic overtones) on high-end monitoring equipment. For practical listening, AAC 256 kbps is transparent.
Does Final Cut Pro work with AAC audio?
Yes, Final Cut Pro reads AAC natively. However, for professional audio work: either use AIFF/WAV source audio, or Final Cut Pro will work with AAC. For color-critical and audio-critical projects, professionals work with AIFF to avoid any potential quality loss during the edit process. AAC is fine for basic video editing where audio is background music or narration.
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