Commented out the crowbar_hit_world section that made the sound play.
Unzip into steamapps/sourcemods folder replacing the script file of the original mod(s).
Crowbar_hit_world sound was played alongside the sounds of crowbar hitting objects/enemies, interfering with them.
For those who are embarrassed with the extra metal clang (especially when hitting flesh or wood), this is no longer the case :)
The best addition.
This comment is currently awaiting admin approval, join now to view.