Convert AIFF-C Compressed Audio (.aifc) to Audio Interchange File Format (.aiff) online for free. Fast, secure audio conversion with no watermarks or registration.
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AIFC (AIFF-C) and AIFF are closely related Apple audio formats. AIFF stores strictly uncompressed PCM audio in big-endian byte order, while AIFC extends AIFF with a compression type field supporting IMA ADPCM, MACE 3:1/6:1, u-law, A-law, and uncompressed PCM (type 'NONE'). Both formats share the same IFF-derived container structure and were developed by Apple in the late 1980s.
Converting AIFC to AIFF decompresses any compressed audio in the AIFC container and stores the result as uncompressed PCM in a standard AIFF file. For AIFC files that already contain uncompressed PCM (compression type 'NONE'), the conversion is a lossless remux — the audio data is copied bit-for-bit into the AIFF container without any transcoding.
AIFF has broader software support than AIFC. Professional DAWs like Logic Pro, Pro Tools, and GarageBand handle AIFF reliably, but some choke on AIFC files — especially those containing MACE or IMA ADPCM compressed audio. Converting AIFC to AIFF ensures clean import into Apple's professional audio ecosystem.
Archival workflows often mandate uncompressed PCM in AIFF format. Broadcasting organizations, music libraries, and audio preservation projects typically reject compressed formats. Converting AIFC to AIFF satisfies these requirements while staying within Apple's native audio format family.
FFmpeg reads the AIFC container and identifies the compression type. For uncompressed PCM (type 'NONE'), it performs a stream copy — the big-endian PCM data is transferred bit-for-bit into the AIFF container with no transcoding. For compressed variants (IMA ADPCM, MACE 3:1/6:1, u-law, A-law), FFmpeg decodes the audio to raw PCM samples and writes them as 16-bit big-endian PCM into the AIFF container. The COMM, MARK, and SSND chunks are reconstructed to standard AIFF specification.
For AIFC files with uncompressed PCM ('NONE' compression), quality is perfectly preserved — zero loss, bit-for-bit identical audio data. For AIFC files with IMA ADPCM, the decompressed PCM faithfully represents the ADPCM-encoded audio, though ADPCM's original 4:1 compression introduced minor quantization noise. MACE 3:1 and 6:1 sources produce the most degraded AIFF output, as MACE was a crude lossy algorithm. The conversion itself adds no additional quality loss — it only decompresses what was compressed.
| Device | AIFC | AIFF |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
AIFC to AIFF converts Apple's compressed audio format back to the universal uncompressed AIFF standard. For PCM-containing AIFC files, this is a lossless remux; for compressed AIFC, it decompresses to full PCM for maximum compatibility.
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| No |
| Характеристика | AIFC | AIFF |
|---|---|---|
| Повна назва | AIFF-C Compressed Audio | Audio Interchange File Format |
| Розширення | .aifc | .aiff |
| Найкраще для | Compressed AIFF | Lossless quality |