How to set a trigger to play a sound?

In a map I'm playing, I want to play a sound effect when <event> happens. How would I do that?

I figured maybe this belongs in the sound forum, but it's really more about implementing sound than making it.

Event:
(What ever you want)
C-
A:
Sound-Play sound(your sound)

go to sound manager and choose a sound you want first

btw. wrong forum