TVs & Home Theaters forum


No sound from Denon receiver with optical cable

by touchdown7 / November 13, 2013 1:31 AM PST

We are not getting sound out of a Denon AVR 1312 receiver. We have DirectTV connected to the Denon via an HDMI cable. Using the HDMI out the Denon is connected to a Sharp TV. We then connected a Vizio 5.1 channel sounbar system to the Denon using an optical cable. We are getting no sound from the TV input. We were able to get sound from the speaker system using the iphone and bluetooth, thus the speakers appear to be working. Looking for help on what the problem might be. Thanks

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All Answers

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Remember those HDCP rules.
by R. Proffitt Forum moderator / November 13, 2013 1:48 AM PST

That pass through might be restriicted, blocked or degraded through the HDTV. Bluetooth is usually stereo (99.99% of the time) so if you are trying to pass 5.1 sound it might go silent.

This area is well worn but I understand folk are going to bump into this over and over.

Also, an input has no sound output. I'm sure you meant something else but wanted to be painful crystal clear because I did encounter too many setups where they connected the TV's input jacks to their receiver's input jacks and wondered why nothing happened.

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No sound
by touchdown7 / November 13, 2013 2:09 AM PST

Bob, thanks for the input.
We are a novice at connecting this equipment. I was under the understanding that an HDMI cable carried both audio and video. So we were thinking the HDMI connection from Direct TV (Genie) to the Denon was carrying both.

So would there be a solution to the TV restricting / blocked or will this setup just not work?

Thanks again for the help.

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That part is right. HDMI carries it but HDCP steps in
by R. Proffitt Forum moderator / November 13, 2013 2:18 AM PST
In reply to: No sound

Along with other rules. You may want to consider unplugging all HDMI and removing power since we have seen HDCP handshake failures that only seem to go away on a full power cycle. I'm going to shortchange you here since HDCP handshake discussions and web pages abound.

OK, so the normal chain is from SOURCE to HT and then on to the HDTV. The optical is put into play when the HDTV is the source such as OTA (over the air) or things like game consoles that you didn't connect to the HT first.

However pass-through is sadly hampered or hobbled by HDCP rules. Let me be clear there are no technical reasons all this can't work. It's all about the studio's worry that high definition content might leak. We only need to google "plugging the analog hole" to see prior content about all this.

This is why I consider HDMI and BluRay to be nice but can be consumer unfriendly.

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Link, comment
by R. Proffitt Forum moderator / November 13, 2013 2:33 AM PST seems right for this use.

It does NOT seem to support ARC which has proven problematic at times so good to see it not try that.

It supports a lot of digital audio formats up to 5.1 (check.) But then 7.1 is mentioned later in the manual at

As I read about pages 17 to 20 something I can see that using the HDMI passthrough then the audio from the HDTV optical might not be supported. I can't tell but I'd have to read it a few more times.
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Truth about using Soundbar w/ Denon AVR
by Pepe7 / November 13, 2013 4:20 AM PST

Truth be told, soundbars are not intended to be used with traditional AV receivers. For that you obtain proper surround speakers & sub. There's no such thing as 5.1 from any soundbar. Sorry.

For an good value entry level speaker/sub system, check out the Energy Take Classic 5.1 system (@ Amazon), or look at the Monoprice generic version for even less $ but decent surround sound. Just to see what you are missing w/ the overpriced Vizio soundbar.

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