For Spigot servers
OpenAudioMc gives your community a way to talk and listen together in game. They never install anything, and you never run a voice server.

Automatic location based voice chat with spatial client support, moderation features and more. All without mods. Players just need to open a link they receive when they join your server, and they're good to go.

We offer a free tier for small servers, with 200MB of storage, 10 voice slots and unlimited (fair use) audio slots. Both can be upgraded through a content creator form or a variety of patreon plans, to support the project.

Installations linked to your account can easily be managed through the web interface. You can customize the look and feel of your client, upload your own music and sound effects, and more.

Create voice channels to let players talk to each-other privately or in groups throughout your entire server. You can lock certain channels behind permissions, let players create their own and customize all command messages.

Assign music to specific World Guard regions or worlds, to add dynamic area music to different parts of your server.

Place speakers throughout your world, to play spatial music/effects emmitting from a block.

Questions
Install the plugin on your proxy and on every sub server. Make sure the proxy has the permissions it needs and you are done.
Drop the jar into your servers, link your account and you are running. The full walkthrough lives in the installation guide.
They run /audio in game and open the private link they get back. Nothing to install.
Yes. Join the Discord and link your account to verify you own the server, then ask away.