I've got the comcast cable going in to the eyeTV hybrid (2009), which goes in to the mac mini, which outputs (mini displayport --> HDMI) to a Sony Bravia. Here's the problem: sometimes when I change channels, the sound on the new one is high-pitched static. Usually changing a few more times brings back the normal sound, but it's really annoying and obviously shouldn't be happening. Has anyone experienced this? Fixes? Thanks!