Using the OpenAudioMc webclient
The web client (also known as the website) is the page that makes the magic work. Minecraft doesn’t support audio streaming itself, so the web client is a web page which users must leave open in the background during their visit on your server to hear all sounds.
Users get prompted with a clickable link when joining to open the client, but can also manually re-generate a link using
(they all do exactly the same, just whatever fits your server style the best)
It may be a bit annoying to go back and forth between Minecraft and the webclient to get the volume just right, so you can do
to adjust the volume from in game!