I've been using my roku devices for years, and this problem only occurs for Boston Legal, repeatedly and for all or most episodes. When the episode begins, the audio turns into a mess of digital static white noise. We have to rewind the content, or get out and restart, and then the audio plays back correctly. Happens every time we play episodes of Boston Legal, and not for any other content that I can recall.
A few questions here to better understand what you're experiencing: Which streaming channels are you experiencing this issue on? Are you using a Roku TV or a Roku device? What troubleshooting steps have you taken so far to try to resolve the issue?
I'd be happy to take a closer look to see how we can help get you up and running.