core + attic (Attic Area): these terms have been either deprecated from the core or extentions, or removed from pending as not accepted into the full vocabulary.

audio

Canonical URL: http://schema.org/audio

Thing > Property > audio

No comment

Usage: Between 1000 and 10,000 domains
Values expected to be one of these types
AudioObject
Used on these types
CreativeWork

Schema Version 3.4