So ... I have this problem. I got had to do an 911 call, an emergency call. I got the .mp3 files from the 911 company. Now the problem is that some people (witness) were also talking near me... but I can't hear very clean what they are saying because of my voice and the operator voice. Where the heck I can find an software (demo or freeware) with I can cut off my voice , the operator voice and only hear the background voices (what witness were talking)