I have connected the Amp to the ARC channel but there is no sound. I found the diagram below on the Sony site which appears to explain why -
"However, if connecting a system that is not BRAVIA Sync-compatible or ARC capable, an additional audio connection via DIGITAL AUDIO OUT (OPTICAL) is necessary."
I can stay with the optical connection from the TV to the Amp but this appears to lose any DTS signal and the amp has to use one of its artificial surround options:
Making a Connection
HDMI cable
- Antenna cable
- HDMI cable with ARC (Audio Return Channel)
If your Home Theatre System, TV, and the HDMI cable support ARC, it means the TV can transmit sound to Home Theatre System. When you connect the TV to the Antenna/Cable directly (without Set Top Box, it will allow you to hear the TV sound through speakers connected to Home Theatre System.
If you are using Set Top Box, you will need to output the sound from Set Top Box to Home Theatre System.
When connecting a BRAVIA Sync-compatible digital audio system with Audio Return Channel (ARC) technology, find the HDMI jack (socket) that carries the "ARC" mark (HDMI IN 1 or HDMI IN 2, depending on your model/ region/ country) and connect to it with an HDMI cable. However, if connecting a system that is not BRAVIA Sync-compatible or ARC capable, an additional audio connection via DIGITAL AUDIO OUT (OPTICAL) is necessary.
If connecting a system that is not compatible with Control for HDMI or ARC, an additional audio connection is necessary:
HDMI + Optical Audio cable