Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
All Roku devices support passthrough audio, including 5.1. However, in order to get 5.1 audio for most services, you connected device must support DD+ (EAC3), not just DD (AC3).
If you have older equipment that only supports DD (and not DD+), the new Ultra (4800) can convert the DD+ to DD, giving you 5.1 in all supported apps/scenarios.
