Hey I just recently downloaded Fallout New Vegas from Steam.

Finally got it installed and going and from the moment the bethesda 'slid' comes up it starts to make a clicking noise like an old record looping on a record player...and this sound
continues constantly even tho dialouge and sound effects are fine.

It doesnt do it during FMV cutscenes tho like the one at the begining.

Ive tired all the fixes for other sound issues but still wont work correctly, Im hoping someone has had the same issue as me and may know a solution,

Hope someone can help

Many Thanks.