Audio Drops

We have been experiencing audio dropouts for the last few months in Phoenix.  We have replaced the DVR, and had technicians out to our home 3 times. All the technicians have tried their own tricks and contradict what the other technicians have done and tried.  We were told once that it may be the TV since it was warranty we even replaced it.  We can record one show and it is fine, and the next show on the same channel the audio dropouts are so bad it’s unwatchable. Is anybody else experiencing similar problems.  We have had no issues with picture.  I am thinking that its time to switch back to another provider but looking for any answers before I switch.