How do I stop my receiver from down-mixing 5.1 audio to stereo?
I have an Onkyo Sr-500 and a Samsung UN55C8000 (Old receiver + new TV). When I watch over-the-air broadcast stations, many of them are broadcast in 5.1.
I am running a digital optical cable from my TV audio out directly to my receiver. I know the cable should be able to transmit the 5.1 signal, but my receiver displays the Dolby Digital icon in addition to a stereo icon.
I can hear sound only coming out of the Front L & R speakers. I know the other speakers are hooked up properly. The only other audio selections I can make are Pro-Logic movie/games, etc. and sometimes All Channel Stereo. I have read of people having issues with their receiver down-mixing the audio signal to stereo. How do I get mine to play dolby digital 5.1?
Thanks for your help!
My first thoughts are that you haven't set up the receiver correctly.
You can test this by selecting Pro-Logic II processing on the receiver. This will play audio (including stereo) around your 5.1 speakers. Do you hear audio from all speakers when you send it some audio from the TV? If you still only hear stereo, then you haven't set the receiver correctly.
On page 18 of the Onkyo TX-SR500 manual, it tells you how to configure the unit for the number of speakers you have. Check the 'speaker adjust' setting and make sure it isn't set to 'Speaker 2ch'. It should be on 'Speaker 5ch' to play surround audio.
Do you have any other devices connected to the receiver - like DVD or Blu-ray? Do these play in surround sound?
If it is set correctly, then I can only assume you are only getting Dolby Digital 2.0 from the broadcast TV station and not 5.1. Are you absolutely sure they transmit in 5.1 over the air?
Hope that helps.
Paul (Site Editor)
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About Home Cinema Guide
Paul started the Home Cinema Guide to help less-experienced users get the most out of today's audio-visual technology. He has worked as a sound, lighting and audio-visual engineer for around 20 years. At home, he has spent more time than is probably healthy installing, configuring, testing, de-rigging, fixing, tweaking, re-installing again (and sometimes using) various pieces of hi-fi and home cinema equipment.