Can I use RCA cables to connect the Panasonic Viera TX-P50G30Y 50" Full HD plasma TV to an amplifier to get TV's own speakers muted and volume control to work?
One thing that's really important here if you're using the TV as the audio source (or audio passthrough) is to NOT use RCA outs; this set does include an optical audio out, you should definitely take advantage of that. Chances are if you do, this set (like many others) is already be smart enough to know that it should disable its internal audio since there's a receiver on the other end.
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Check the manuals for both the plasma and your receiver (I am assuming you meant receiver) and see about using the Audio Return Channel (ARC) - which is part of the HDMI 1.4 spec. That would be the easiest way to handle surround sound audio. However, the North American manual for this TV does not describe ARC support - it is only mentioned in the specs on Panasonic's web site. It is described in an online FAQ:
"Connect an HDMI cable to the HDMI connection on the back of the TV labeled HDMI 1 (ARC). Then connect the other end of the HDMI cable to an ARC-enabled HDMI connection on your A/V receiver."
"ARC allows the TV to play the audio from TV programming (or another source device) through a home theater system or an external A/V amplifier device connected to the TV's HDMI (ARC) connection."
If you really did mean amp (and not receiver) and if you really only want stereo, then I suppose RCA is your only option. The same online FAQ says the following about getting this to work:
"An optical cable can be connected to the TV to send audio from the TV to a digital to analog audio converter. A digital to analog audio converter can convert audio from the television’s “Digital Audio Output” and send the audio to your headphones or home theater system using an RCA connection."
If so, then the remaining problem is volume control. The TV will output line level audio (fixed volume - not adjustable); the NuForce (HDP?) will have to provide the volume control, and I don't think the HDP supports a remote control. Perhaps the new model NuForce device provides that?
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