Is it possible to make a sound echo?

Is it possible to make a zombine “scream” echo?

Thanks in advance.

I’m not sure but I think that can be done by creating your own soundscape for it or using one of valves soundscapes (Although none of them have a zombine scream echo I think).

If I recall right, just adding an indoor soundscape to the area will cause things to echo.
At least that’s how it seems.

use the outdoor soundscape, im pretty sure that’s the one that echoes… although you will have the issue of the small “hummmmmm” in the background

Make a custom soundscape that causes echoes and either have the scream as part of it, or add an ambient_generic.