A description of the audio e.g. ‘Bee Gees - Stayin’ Alive’, or some kind of content description for accessibility e.g. ‘audio attachment’.
OptionalfileRequired if the file is encrypted. Information on the encrypted file, as specified in End-to-end encryption.
OptionalinfoMetadata for the audio clip referred to in url.
One of: [m.audio].
OptionalurlRequired if the file is unencrypted. The URL (typically mxc:// URI) to the file.
Content format of media events with msgtype
m.audioSee
https://spec.matrix.org/v1.9/client-server-api/#maudio