Does anyone know how to properly use an env_microphone? I want to have a radio song reverberated through a chamber, when brought to a specific location. I tried using 2 ambient_generics and triggers, but hey, major sound collision happened.
Dunno what to do.

Your env_microphone must have an info_target set as speaker target. As soon as this is set, env_microphone is used to record all sounds. All those recorded sounds get played at the speaker target.

https://developer.valvesoftware.com/wiki/Env_microphone

I tried this. And I tried to play many sounds near the microphone, including ambient generics, physics sounds. No projection at all. Also yes, I did check the developer wiki first since I rarely get help on these forums.