(registered 2026-07-13, last updated 2026-07-13)

Media type name: audio

Media subtype name: prs.aaud

Required parameters: N/A

Optional parameters: encoding: underlying codec (e.g., "wav", "mp3")
version: AAUD format version (e.g., "1")

Encoding considerations: binary

Security considerations: This media type represents a binary container for audio data and associated AI provenance metadata.

The format does not contain executable code. However, all embedded audio and metadata must be treated as untrusted input.

AAUD includes integrity mechanisms such as cryptographic hashing to detect tampering. Future versions may support digital signatures for authenticity verification.

Metadata may include model identifiers, timestamps, or generation fingerprints. Applications should avoid embedding sensitive or personally identifiable information unless properly protected.

If standard audio formats (e.g., WAV, MP3) are embedded, their respective security considerations apply.

Secure transport (e.g., TLS) is recommended.

Interoperability considerations: AAUD is designed to interoperate with existing audio systems by optionally embedding standard audio formats during early adoption.

Systems that do not recognize AAUD metadata should still be able to extract and play the underlying audio payload.

Correct parsing of metadata structures is required for full functionality.

Published specification: https://github.com/aimediaformat/media-engine/blob/main/spec/ai-media-format.md

Applications which use this media: AI voice generation systems, audio verification tools, digital forensics, and media authenticity pipelines.

Fragment identifier considerations: N/A

Restrictions on usage: None

Additional information:

1. Deprecated alias names for this type: AAUD
2. Magic number(s): 41 41 55 44 ("AAUD")
3. File extension(s): .aaud
4. Macintosh file type code: N/A
5. Object Identifiers: N/A

Person to contact for further information:

1. Name: Ai Media Format
2. Email: aimediaformat&gmail.com

Intended usage: COMMON

AAUD is part of a broader AI media format family including AIMG (image) and AVID (video), which follow similar design principles.

Author/Change controller:Ai Media Format
Open-source community (future evolution)