I was getting some garbled audio from my HR20 -700 during Bill Maher a few minutes ago... was running 0570, just dl 0576, when it comes back up will see ... this is thru a denon receiver & hdmi... first time I've had this ever.
the normal the A/V small RCA surround sound,i really don't know, my tv is hook up by HDMI , receiver: HR22/100 i found one that look the same to just show you, RCA Home Theater System with DVD Player - Walmart.com
Optical connection, I'll have to check my other dvr tomorrow & see if I notice anything, it is connected with optical but I downloaded the CE on it tonight also.