Although not using ARC on our system, the best I can assert is, ARC is auto-switched with the newer Marantz and Samsung models.
Pg 8 of the SR5007's e-manual makes no mention of any user required switching. It twice makes mention of the need to use a HDMI cable with Ethernet.
"When the ARC function is used, connect a device with a “Standard HDMI cable with Ethernet” or “High Speed HDMI cable with Ethernet” for HDMI."
The same with Samsung. All I can find with Samsung is in the printed model provided with the television. From Pg 11.
- We recommend using a basic high-speed HDMI cable or an HDMI cable that is Ethernet compatible. Note that this product does not support the Ethernet function via HDMI.
- This product supports the ARC (Audio Return Channel) function via an HDMI cable. Note that the ARC function is supported by the HDMI IN 2 (ARC) port only.
- The ARC function allows digital audio to output via the HDMI in 2 (ARC) port on the TV. It can be enabled only when the TV is connected with an audio receiver that supports the ARC function.
(turn page)
So far, I haven't found anything regarding ARC in Samsung's e-manual which is "ONLY" 673 pages long.
Click, click-click-click, click, click-click-click some more.......
Starting on page 580 of the Samsung UN60ES6100 e-manual, Anynet+ (HDMI-CEC) and it's use/implementation is covered.
Hmmmmmm, this might be important:
–– To hear 5.1 channel audio, connect
HDMI cables to your Anynet+ DVD
player, satellite box, etc. Then,
connect the DIGITAL AUDIO OUT
(OPTICAL) port on your DVD
player, Satellite Box, etc. (i.e.
Anynet+ Device 1 or 2) directly to
the Home Theater, not the TV.
-