I have a LG LED TV and just bought this soundbar from Costco. TV does not have ARC so from reading the post here, I should hook up my HD cable box and Blue Ray DVD to my TV via HDMI and then hook digital Optical cable from TV to soundbar.
Can anybody confirm?
You didn't mention WHAT soundbar you bought. Does it have HDMI inputs and an HDMI output, or does it only have optical?
The way you intend to connect is fine if the soundbar does not have HDMI inputs for your source devices. If it does have HDMI inputs, you'll likely get better audio by connecting to the soundbar and then run HDMI from bar to TV for video.
The way that I do my Vizio soundbar, is audio from the set-top box, and blu-ray through just a set of RCA cables. That way, if I want just the sound bar, not the AVRS, I can choose which I want to listen to. Just remember KISS, no reason to over think these things.