Using voice chat as in-game radio?Solved
In response to Wulf ():
You can use the in-game voice system in Rust to send byte[] data to other players from the server,...
Yeah, and getting the byte[] data is the hardest and currently impossible part afaik
In response to Slydelix ():
Yeah, and getting the byte[] data is the hardest and currently impossible part afaik
I believe you could download it using a Unity WebRequest, but I've not tested that.
In response to Wulf ():
I believe you could download it using a Unity WebRequest, but I've not tested that.

yeah but voice chat uses steam's compression (Facepunch.steamworks), just sending the audio converted to byte[] cannot work (as far as I know)

When you press V in-game game tells Steam to look for voice input and if it's found it's sent from Facepunch.Steamworks.Client in a compressed format thru an Action<byte[] or somethin> 

Some of the info may be wrong as I was looking into this a few months ago, basically managed to play music but it was limited

yeah @Slydelix same :-( but one guy did this (somehow compressed/.. music using steam using his plugin) and he doesnt wanna share it with me
In response to Slydelix ():
yeah but voice chat uses steam's compression (Facepunch.steamworks), just sending the audio converte...
this was one of the reasons why right now using the Rust ingame voice commmunication system makes it right now impossible for a reasonable use. When i was using it for 5 players who tested it, the server was able to handle the data but at about 8-10 players who sends or and recive data the server was beginning to kick the transmitting players "Packet flooting"!  Double the sending bytes in a stady stream couses the server to thing that someone is trying to floot the server. How ever. When you aren´t changing the normal voice ingame and add extra voice transmitting possibilities the server is unwilling to handle it. But when you add the voice to items the server simple starts to lagg for all of the players on the server even when they arent listening to a station.
In response to misticos ():
yeah @Slydelix same :-( but one guy did this (somehow compressed/.. music using steam using his plug...
you tryed to compress music file into byte[]? i hope not
In response to misticos ():
yeah @Slydelix same :-( but one guy did this (somehow compressed/.. music using steam using his plug...

This is what I was able to achieve... 
https://youtu.be/IyzAEsN7NBg
This was ~6+ months ago, the code is long gone and the implementation was so AWFUL I regreted I made it (Recorded on my test server (not by me))

Currently biggest obstacle is figuring out the compression method used by steam

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