I have a Vizio VHT215 soundbar hooked up to my Tivo Premiere via digital coaxial from the TV (a 42" Philips Costco special from 4 or 5 years ago. It does not support ARC). Whenever I change channels, skip, go to the tivo options, etc I almost always get a loud chirrup - very short and sharp. Something that, to me at least, sounds like some sort of weird discontinuation on the sound - like a burst of high pitched static. During play back or live TV it seems to work just fine but the high pitched burst is unacceptable. This sound did *not* occur prior to using the sound bar. Also, if I just use the analog audio the sound doesn't happen. So I'm not sure if its the soundbar that is defective, the TV introducing a problem on the digital out, of if it's something odd with the Tivo. Has anyone come across this before or have any ideas or suggestions? Next step is to use the HDMI from the Tivo to the soundbar to the TV (via passthrough) but that's not my optimal solution (we have 3 HDMI device and the soundbar only has two HDMI inputs). Thanks!