This is a paid asset, but now you can download Master Audio Multiplayer Free.
Detail this asset from Unity Store: Original Link
Master Audio Multiplayer v1.3.8 (Latest version)
Master Audio Multiplayer v1.3.0
Master Audio Multiplayer v1.1.9
Upgrade pricing available if you own Master Audio!
Master Audio Multiplayer is the ONLY audio framework for Unity with extensive turnkey multiplayer features! Works with both Mirror and Photon (PUN & free version). UNET deprecated package included as well.
Videos | Docs | API | Forums | Unity thread
Your dynamic audio will be heard by all players without having to write any extra code or RPC’s. Just check the “Multiplayer Broadcast” checkbox that appears on our super powerful event-based scripts! This plugin includes the full current version of Master Audio.
Also includes an exended multiplayer API that adds on top of the Master Audio API for easy 1-line multiplayer audio code!