When I order movies from Verizon, the sound fluctuates up and down. This does not happen on HD channels on regular TV. I am using optical cables. I have played with all of the compression settings: Dynamic Range off to heavy.
If you are having an issue with your Verizon service, you can use the Verizon Troubleshooter to fix and report issues with your Verizon Phone, FiOS TV, or Internet Service. You can also schedule a repair. Here is the link: http://www.verizon.com/repairYou can also find tools on the Verizon Residential Support page that may help you diagnose your issue: http://www22.verizon.com/residentialhelp
