By SongTools.ai
AIFF and WAV are both uncompressed PCM audio, so it's fair to wonder why the choice matters at all. Here's the real difference, metadata, platform origin, and the situations where picking the wrong one causes actual problems.
Unlike WAV vs. MP3, which is a genuine lossless-vs-lossy distinction, AIFF vs. WAV confuses people for a good reason: audio-wise, they're essentially identical. Both are uncompressed PCM container formats. WAV developed by Microsoft and IBM, AIFF developed by Apple, and both can store the exact same sample rates and bit depths with zero compression and zero quality difference between them. If you convert a WAV to AIFF and back, you lose nothing, because there's nothing about the audio encoding itself that differs.
So why do both formats still exist, and why does it ever matter which one you use?
The real differences are in the container, not the audio:
- Metadata support. AIFF uses Apple's IFF chunk structure, which handles rich metadata, title, artist, album art, comments, custom tags, more consistently across different software. WAV technically supports metadata too (through RIFF INFO or Broadcast Wave Format chunks), but support is spottier: some applications read it, others ignore it or strip it out entirely, which is why WAV has a reputation for "losing" tags that a user swears they added.
- Byte order. WAV stores audio data in little-endian byte order (matching Intel-style processors), while AIFF uses big-endian (historically matching Motorola-based Mac hardware). This is invisible to you as a user today, modern software handles either automatically, but it's the technical root of why the two formats exist separately at all rather than being the same thing with two names.
- Platform association. WAV is more universally the default on Windows and in cross-platform audio tools; AIFF is more associated with Apple's ecosystem (Logic Pro, GarageBand) but is read and written fine by essentially all modern DAWs and audio software on any platform. Neither is actually locked to its "home" operating system anymore.
- File size. AIFF files are sometimes marginally larger than an equivalent WAV due to the metadata and chunk overhead, though the difference is negligible relative to the audio data itself and won't affect anything practically.
For most day-to-day work, it genuinely doesn't matter which you pick, audio quality is identical either way. A few situations where it's worth being deliberate:
- Sending a file where metadata needs to survive the trip. If you're delivering a track with title/artist tags embedded and need them to reliably show up wherever the file lands, AIFF's more consistent metadata handling makes it the safer bet.
- A distributor or client's spec sheet says one or the other. Some delivery specs explicitly ask for WAV; a few (often Apple-ecosystem-adjacent) ask for AIFF. When a spec is given, match it exactly rather than assuming they're interchangeable enough not to matter, better to spend thirty seconds converting than to have a delivery rejected on a technicality.
- Working across a mixed Mac/Windows team. WAV's broader default support on Windows-based tools makes it the safer universal choice if you're not sure what everyone downstream is using.
- You just don't know and there's no spec. Default to WAV, it's the more broadly expected format in most production and distribution contexts, and nothing is lost by choosing it over AIFF when either would technically work.
Because both are uncompressed PCM, converting AIFF to WAV or WAV to AIFF is one of the cleanest, lowest-risk conversions there is, no re-encoding of the audio itself happens, just a repackaging of the same sample data into a different container. The Audio File Converter handles this directly: upload either format, choose your output, and the sample rate and bit depth carry over exactly (or get resampled, if you also want to change those). Because there's no lossy compression involved in either format, there's no quality to lose in this particular conversion, a genuinely rare case where "just convert it" carries zero downside.
Q: Does converting between AIFF and WAV reduce audio quality?
A: No. Both formats store uncompressed PCM audio, so converting between them just repackages the same sample data into a different container; there's no re-encoding, compression, or data loss involved either direction.
Q: Why does my WAV file's metadata (title, artist) sometimes disappear when I share it?
A: WAV's metadata support is less consistently implemented across software than AIFF's, many applications read or write WAV metadata inconsistently, or strip it out entirely during processing. If reliable metadata matters for a specific delivery, AIFF is generally the safer choice.
Q: Is AIFF an Apple-only format?
A: No, that's a common misconception. AIFF was developed by Apple and remains closely associated with Logic Pro and GarageBand, but it's fully readable and writable by essentially all modern DAWs and audio software on Windows and Linux too.
Q: If a distributor doesn't specify, should I use WAV or AIFF?
A: WAV is the more universally expected default when no format is specified, since it has broader default support across platforms and tools. Either would work quality-wise, but WAV is the safer assumption absent other guidance.
All the tools discussed in this article are available on SongTools.ai, free to explore.