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Supports: CAF
CAF (Core Audio Format) is Apple's native audio container, designed for macOS and iOS. It can wrap PCM, AAC, Apple Lossless (ALAC), and other codecs, and unlike WAV it has no 4 GB file-size cap — useful for long captures and high-resolution audio. The downside is reach: outside the Apple ecosystem most software either can't open CAF at all or handles it poorly. WAV is uncompressed PCM in a container every operating system, DAW, sampler, and broadcast system has read since the 1990s. Common reasons to convert CAF → WAV:
| Property | CAF | WAV |
|---|---|---|
| Origin | Apple (macOS 10.4+, 2005) | IBM / Microsoft (1991) |
| Max file size | Effectively unlimited (64-bit offsets) | 4 GB (standard RIFF); RF64 / W64 extend further |
| Codecs supported | PCM, AAC, ALAC, MP3, μ-law, A-law, IMA4, more | PCM (uncompressed); some variants carry ALAW/MULAW |
| Compression | Optional (lossy or lossless inside CAF) | Uncompressed PCM in standard usage |
| Platform reach | macOS, iOS, limited elsewhere | Every OS and audio app since the 1990s |
| Editing in DAWs | Logic / GarageBand native; spotty elsewhere | Native in every DAW |
| Best for | Apple-only workflows, long high-resolution captures | Editing, mastering, distribution to non-Apple tools |
| PCM format | Quality | File size (stereo) | Best for |
|---|---|---|---|
| 16-bit / 44.1 kHz | CD quality | ~10 MB/min | Music distribution, CD burning, general listening |
| 16-bit / 48 kHz | Video-standard | ~11 MB/min | Audio for video, podcast post |
| 24-bit / 48 kHz | Pro studio | ~17 MB/min | DAW mixing, headroom for processing |
| 24-bit / 96 kHz | High-resolution | ~33 MB/min | Mastering, audiophile archives |
| 16-bit PCM big-endian | Legacy | ~10 MB/min | SGI / classic Mac toolchains |
| PCM μ-law / A-law | Telephony | ~4 MB/min | VoIP, IVR, legacy phone systems |
It depends on what's inside the CAF. If the CAF contains PCM or Apple Lossless (ALAC), the conversion to WAV PCM is bit-perfect — every sample is preserved. If the CAF contains AAC (lossy), the audio is decoded once into PCM and written to WAV; the WAV is a faithful copy of the decoded AAC, but it can't recover information that AAC discarded during encoding. The conversion step itself doesn't add new loss.
CAF is an Apple format with limited support outside macOS / iOS. Windows Media Player and most native Windows tools don't recognise it. VLC plays many CAF files, and FFmpeg can decode them, but full editor support is rare. Converting to WAV is the most reliable way to get the audio into Windows / Linux DAWs, samplers, and players.
Match the CAF source when known — Logic Pro and GarageBand sessions are commonly 44.1 kHz or 48 kHz, often 24-bit. For music distribution and CD burning, choose 16-bit / 44.1 kHz stereo. For audio paired with video, 16- or 24-bit / 48 kHz keeps the rate aligned with the video frame clock. For mastering or further processing, 24-bit / 48 kHz or 96 kHz preserves headroom.
CAF often wraps compressed audio (AAC at 128-256 kbps, or ALAC at roughly half the PCM size). WAV stores every PCM sample at full bit depth — a stereo 16-bit / 44.1 kHz signal is ~1411 kbps regardless of content. A 4 MB AAC-in-CAF clip can land around 40 MB as 16-bit WAV. That's expected: WAV trades size for editability and universal compatibility.
Yes. Drop in an entire session folder or render export at once. Each file converts in parallel within your browser session and downloads individually or as a single ZIP. Settings can apply uniformly across the batch (typical for stems from one session) or be tuned per-file.
Standard multi-channel CAF files (mono, stereo, and common surround layouts) convert to WAV with channels preserved. Highly unusual CAF variants — exotic surround layouts or non-PCM codecs that aren't widely decoded — may need a downmix step. Most music and voice CAFs from Logic, GarageBand, or iOS apps convert without manual intervention.
Sample data and basic format chunks transfer cleanly. CAF supports rich annotations — markers, region names, MIDI tempo maps — that don't all have direct WAV equivalents. Standard WAV chunks (fmt, data) are always written; non-portable Apple-specific metadata may not survive. If you need to preserve markers for DAW work, keep the original CAF as a master and use the WAV for delivery.
If size matters more than editability, yes. WAV is for editing, mastering, and tools that require PCM. For distribution and casual listening, CAF to MP3 gives roughly 10× smaller files at near-transparent quality, and CAF to M4A keeps files in an AAC container that's still well-supported on Apple devices but smaller than WAV.