AudioPlayerRenderer

AudioPlayer -- the same promise as VideoRenderer, in a bar rather than a frame.

Nothing plays here either, and the note on VideoRenderer is the whole of why. What is different is that the catalog gives an AudioPlayer a description -- "a title or summary" -- so unlike a video this one has words of the agent's own to show, and it shows them: an audio component that drew only a transport bar would be an unlabelled control in a surface whose text is the entire point of the component. The description doubles as the accessible name, which is the ImageRenderer pattern -- the part of a medium a renderer without the medium can still deliver.

A bar spanning its container, per the guide's "like video, its container should span the full width of its parent".