This type has been deprecated in favor of one of it's alternatives. While you should likely still support it, it should not be your first choice if assigning a MIME type.
Instead please use audio/aiff

AIFF (Audio Interchange File Format) files store uncompressed signed audio samples inside an IFF container. There's also a compressed variant, called AIFC with the same mimetype.

AIFF chunks provide native metadata. In addition, although it is not in the specification, an ID3 chunk is often used to include ID3V2 metadata.

Used in file types
  • .aiff
  • .aif
  • .aff
This type may also appear as
  • audio/aiff
Further reading
  1. Let's Solve the File Format Problem!