Roamio - Dolby Sound Issues

Newbie here.



Hello. Hoping someone can help! I recently upgraded from a Series 3 Tivo to a Roamio Plus. The Tivo is connected via HDMI and Optical to my Amplifier (Yamaha). I simply removed the connections from the old Tivo, and plugged them into the Roamio....



Now, when I un-pause any roamio recordings or live TV, I get this incredibly loud static / scratchy noise through the Amplifier. I can see that when TV is paused, the AMP is receiving PCM (2 channel from Tivo), when I un-pause it changes to 5ch audio, which is when the terrible noise occurs. I never had this problem on the old Series3.



I tried Tivo support, and they will only troubleshoot anything that connects to a TV only. Also, I don't want to buy a new AMP that supports Audio passthrough on HDMI. (apparently Tivo will do Dolby Digital over HDMI, but I can't confirm this).. The other option is to go HDMI to TV, then optical from TV to AMP, but I'm 99% sure that the TV doesn't support 5ch Audio passthrough from HDMI to Optical....



The short of it is, I think there's a problem with the Roamio, and Tivo wont even attempt to help.



any thoughts? thanks!