make voice chat sound different

I was thinking about this for a while,
is there a way to make the sound transmitted in voice chat just sound like something out of a real radio or maybe some type of echo?
Like a special effect overlaying the normal voice chat?

You can hook onto

GM:PlayerStartVoice and play a sound.

That doesn’t really manipulate the actual voice stream, though.

But it’s not possible in lua to truly manipulate it. I’ve tried looking for a way to do it in lua in the past. So the best you can do is put a static sound over the voice.