Sound echos....

Sound echos....

Alright, I'm making a kinda-sorta-like-DoTA map...with alot of custom crap ANYWAY...For some reason, whenever I select a unit (or anything else with a unit) that usses a sound, in reverbs or something making an echonig sound that is VERY Annoying! Anyidea what the hell it is?

Could it be your speakers or your sound card / settings? Have you tried this out on another computer maybe; or got a friend to try and see if the problem persists on his / her machine?