Sobre os arquivos CAF
Apple Core Audio
Container áudio Apple (2005) usado em macOS, iOS internamente. Suporta múltiplos codecs. Equivalente Apple ao WAV/AIFF para uso técnico.
Família
Audio Files
Extensão
.caf
Tipo MIME
audio/x-caf
Pode ser usado como
COMO NASCEU O
FORMATO CAF.
CAF — Core Audio Format — shipped with Mac OS X 10.4 Tiger in April 2005 as Apple’s answer to WAV’s 4 GB file size limit. By the mid-2000s professional audio was bumping into that ceiling: a 24-bit 96 kHz multi-track recording could overflow WAV in under an hour. CAF uses 64-bit chunk sizes, so file size is effectively unlimited.
Inside Apple CAF is used for system sounds, GarageBand projects, Logic Pro session audio, and iOS app sound effects. It supports any codec that Core Audio can decode: PCM, Apple Lossless, AAC, IMA ADPCM, and more. Outside Apple, CAF is rare — most non-Apple audio tools stick with WAV or BWF for interchange. If you get a .caf file, it’s almost certainly from a macOS or iOS development workflow.
CURIOSIDADES E
FATOS INTERESSANTES.
CAF uses 64-bit file sizes — you can record continuously at 96 kHz/24-bit for days without hitting a limit.
iOS app developers often ship short sound effects as CAF because Core Audio decodes them with minimal CPU.
Logic Pro stores every track in a project as CAF — switching to WAV forces re-encoding.
CAF supports "annotations" — arbitrary text chunks that can carry song lyrics, timing cues, or session notes.
GarageBand files (.band) internally embed CAF audio for each track.
VANTAGENS E
LIMITAÇÕES.
Vantagens
- Unlimited file size (64-bit offsets).
- Can hold any Core Audio codec (PCM, ALAC, AAC, etc.).
- Native Apple ecosystem support.
- Rich annotation and metadata capabilities.
Limitações
- macOS/iOS-centric — limited non-Apple tool support.
- Not a delivery format — exists for workflow, not consumption.
- Proprietary but documented.
- No broad industry adoption; WAV / BWF dominate interchange.
Tamanhos típicos de arquivo
iOS app sound effect (short)
10-200 KB
1 hour Logic Pro track (24-bit 48 kHz)
~620 MB
Multi-track session (10 hours, 32 tracks)
100+ GB
Especificações técnicas
- MIME type
- audio/x-caf
- Extension
- .caf
- Container
- Chunked, 64-bit sizes
- Codecs
- PCM, ALAC, AAC, IMA ADPCM, µ-law, Opus, FLAC
- Max size
- 2^64 bytes (effectively unlimited)
CONVERTER A PARTIR DE
CAF
Casos de uso comuns
macOS/iOS audio development
Formatos relacionados
Comparativos populares
CAF vs FLAC
Diferenças, tamanho de arquivo e quando escolher cada formato.
CAF vs AAC
Diferenças, tamanho de arquivo e quando escolher cada formato.
CAF vs M4A
Diferenças, tamanho de arquivo e quando escolher cada formato.
CAF vs OGG
Diferenças, tamanho de arquivo e quando escolher cada formato.
CAF vs OPUS
Diferenças, tamanho de arquivo e quando escolher cada formato.
CAF vs WMA
Diferenças, tamanho de arquivo e quando escolher cada formato.
Conversões populares de CAF
Os destinos mais procurados ao converter arquivos CAF.
Perguntas frequentes sobre CAF
Perguntas frequentes
CAF (Apple Core Audio) is an audio formatoo de arquivo used to store sound recordings — music, voice, podcasts, sound effects. The formato defines how the audio samples are comprimido (or stored raw), what bitrates are suportado, e how metadata como title, artist, album, e cover art is embedded. It is part of the audio arquivos family.
VLC, foobar2000, e the default media players no Windows e macOS handle CAF natively. On mobile, iOS Music e Android media apps vary in their support — popular formatoos funcionar everywhere; niche ones may need a dedicated app. If playback fails em um device, convertendo to MP3 ou AAC Geralmente solves it.
Upload the CAF to KaijuConverter e pick MP3, WAV, FLAC, AAC, OGG, ou any other target. Our FFmpeg pipeline decodes the audio e re-encodes para o target formato at sensible default bitrates (VBR ~190 kbps para music, 96 kbps para speech). Metadata e cover art travel com the audio where both formatoos support them.
CAF can be com perdas ou sem perdas depending no specific variant. com perdas variants (smaller files) discard some audio detail durante compressão in ways tuned to be inaudible; sem perdas variants preserve every sample exactly mas produce larger files. para distribution, com perdas at alta bitrate is padrão; para archival, sem perdas wins.