> ## Documentation Index
> Fetch the complete documentation index at: https://docs.probe.dev/llms.txt
> Use this file to discover all available pages before exploring further.
# Audio Codecs
> Complete reference of supported audio codecs
## Supported Audio Codecs
This reference lists all audio codecs supported by Probe.dev's analysis tools. Use this to understand what audio formats your media files contain.
| Codec | Description |
| ---------------- | ------------------------------------------------------------ |
| aac | Advanced Audio Coding |
| ac16 | Voxware AC16 (Lernout & Hauspie CBS 12kbps) |
| ac3 | ATSC A/52A / Dolby AC-3 / Dolby Digital |
| ac4 | Dolby AC-4 |
| acelp\_kelvin | Sipro KELVIN |
| acelp\_sipr | RealAudio SIPR / ACELP.NET |
| adpcm | Adaptive Differential Pulse-Code Modulation |
| alac | Apple Lossless Audio Codec |
| alf2cd | NCT ALF2 CD Audio Codec |
| amr\_nb | Adaptive Multi-Rate NarrowBand |
| amr\_wb | Adaptive Multi-Rate WideBand |
| ape | Monkey's Audio |
| atrac3 | Adaptive TRansform Acoustic Coding 3 |
| atrac3plus | Adaptive TRansform Acoustic Coding 3+ |
| avc | On2 Audio for Video Codec |
| celp | Philips Speech Processing |
| cook | Cook / Cooker / Gecko (RealAudio G2) |
| dolby\_e | Dolby E |
| dsd | Direct Stream Digital |
| dst | Direct Stream Transfer |
| dts | Digital Theater Systems |
| dvaudio | DV Audio |
| eac3 | ATSC A/52B / Dolby AC-3 / Dolby E-AC-3 / Dolby Digital Plus |
| evrc | Enhanced Variable Rate Codec |
| flac | Free Lossless Audio Codec |
| ftr | FTR Voice |
| g723\_1 | G.723.1 |
| g729 | G.729 |
| gsm | GSM |
| gsm\_ms | GSM / Microsoft variant |
| iac | Indeo Audio Coder |
| ilbc | Internet Low Bitrate Codec |
| imc | Intel Music Coder |
| litewave | ClearJump LiteWave |
| mace3 | MACE (Macintosh Audio Compression/Expansion) 3:1 |
| mace6 | MACE (Macintosh Audio Compression/Expansion) 6:1 |
| metasound | Voxware MetaSound |
| metavoice | Voxware MetaVoice |
| misc4 | Micronas SC-4 Audio |
| mlp | Meridian Lossless Packing |
| mp1 | MPEG audio layer 1 |
| mp2 | MPEG audio layer 2 |
| mp3 | MPEG audio layer 3 |
| mp3on4 | MPEG audio layer 3 encapsulated into MPEG-4 |
| mp4als | MPEG-4 Audio Lossless Coding |
| mpegh\_3d\_audio | MPEG-H 3D Audio |
| msnsiren | MSN Siren |
| musepack7 | Musepack SV7 |
| musepack8 | Musepack SV8 |
| nellymoser | Nellymoser Asao |
| opus | Opus Interactive Audio Codec |
| osq | Original Sound Quality |
| pcm | Pulse-Code Modulation |
| pcm\_alaw | PCM A-law / G.711 A-law |
| pcm\_mulaw | PCM mu-law / G.711 mu-law |
| qcelp | QCELP / PureVoice |
| qdm2 | QDesign Music Codec 2 |
| ralf | RealAudio Lossless |
| realaudio1 | RealAudio 1.0 |
| realaudio2 | RealAudio 2.0 |
| rk\_audio | RK Audio |
| sbc | Lernout & Hauspie SBC |
| shorten | Shorten |
| speex | Speex |
| tak | Tom's lossless Audio Kompressor |
| truehd | Dolby TrueHD |
| truespeech | DSP Group TrueSpeech |
| tta | True Audio |
| twinvq | VQF TwinVQ |
| vorbis | Vorbis |
| wavpack | WavPack |
| wma\_lossless | Windows Media Audio Lossless |
| wma\_pro | Windows Media Audio 9 Professional |
| wma\_v1 | Windows Media Audio 1 |
| wma\_v2 | Windows Media Audio 2 |
| wma\_voice | Windows Media Audio Voice |
## Common Audio Formats
**FLAC** - Free Lossless Audio Codec\
**ALAC** - Apple Lossless Audio Codec\
**WavPack** - Hybrid lossless audio compression\
**APE** - Monkey's Audio
**AAC** - Advanced Audio Coding\
**MP3** - MPEG audio layer 3\
**Opus** - Modern, efficient codec\
**Vorbis** - Open source alternative
**DTS** - Digital Theater Systems\
**Dolby Digital (AC-3)** - Cinema standard\
**Dolby E** - Professional distribution\
**PCM** - Uncompressed audio
**RealAudio** - Streaming audio (legacy)\
**WMA** - Windows Media Audio\
**ADPCM** - Adaptive compression\
**GSM** - Mobile telephony
This list includes both modern and legacy codecs. Probe.dev can analyze media containing any of these audio formats.