The Extensions by audio element category contains subcategories for the various sorts of audio elements that can be embedded within a MediaWiki article. This would include things like chat boxes, audio players, click activated music clips, narration support for the visually impaired and the like.
If you are looking for extensions that edit audio, upload, or download audio files rather than play them, please see:
This category has only the following subcategory.
The number of included categories (C), pages (P) and files (F) is stated in brackets.