I feed the audio from my Smart TV toslink output to my Naim HiFi system and it works fine for TV programmes. The problem arises when I try to watch films using Netflix or Amazon Prime when instead of normal audio I get what I can only describe as the sound of machine gun fire and I have to revert to the tv's internal speakers. Naim says this effect is caused by a surround sound signal but I have the TV output set to PCM which surely limits it to two channel stereo? If any body has any ideas on how to solve this problem I'd be very grateful.
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Audio Output Problem - Panasonic TX50AX802B
- Thread starter JohnAins
- Start date
jjbomber
Well-known member
- Dec 22, 2006
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JohnAins said:
That sums up Naim customer services quite nicely. Totally useless these days. Once they've got your money, it's game over.
Double check the settings on the TV output are PCM for all inputs. Last resort: try the analogue stereo output from the TV.
If you dont get anywhere I would imagine this would work as a last resort:
http://www.futureshop.co.uk/product_info.php?products_id=8371#.VbklIvlVhBc
http://www.futureshop.co.uk/product_info.php?products_id=8371#.VbklIvlVhBc
Hi, John
sorry to hear about your issue with your tv but can I go off topic. How does the tv prefrom? eg: picture sounds ? I'm thinking of buying one.
James
sorry to hear about your issue with your tv but can I go off topic. How does the tv prefrom? eg: picture sounds ? I'm thinking of buying one.
James
It was jjbomber who criticised Naim but I do tend to agree with him. Mind you Panasonic are no better.
Hi James
In every other way this is a superb set. Excellent picture quality and good sound when fed into a decent HiFi system. It's also now considerably cheaper than when I bought mine a year ago. The table stand it comes with is very heavy and ideally needs two strong people to lift it. Mine was installed by the supplier but I have since moved it by inching it slowly from one cabinet to another.
In every other way this is a superb set. Excellent picture quality and good sound when fed into a decent HiFi system. It's also now considerably cheaper than when I bought mine a year ago. The table stand it comes with is very heavy and ideally needs two strong people to lift it. Mine was installed by the supplier but I have since moved it by inching it slowly from one cabinet to another.
jjbomber said:
Can't see any setting relating to inputs and audio. There is a "surround" setting and I've set that to off. Unfortunately there is no audio analogue output only optical.
Thanks from the reply John. Glad the tv is great apart from you netflix sound issue. Im guessing your tv firmware is up to the latest version? I did find this info. It may or may not help...
https://www.avforums.com/threads/panasonic-et5-netflix-pcm-spdif-issue.1750587/
https://www.avforums.com/threads/panasonic-et5-netflix-pcm-spdif-issue.1750587/
jjbomber said:
Of course, PCM doesn't have to mean two-channel, which is what the Naim is set up to accept, and I can't see anything in the Panasonic manual to suggest there is a stereo downmix option. So unfortunately it seems the TV is lagging behind the new streaming TV sources it supports.
But I agree: you'd expect Naim to be able to fly over to Osaka, sort this out, and then retro-fit it to the TV set. As already said, it's a TV output problem, but what are things coming to?
THXMovieman said:
I have the latest software update. Thanks for the link, much the same problem with other Panasonic TVs and Netflix. I have the same problem with Amazon Prime so it's not limited to the Netflix app as suggested there.
Anyone made progress on this? Just bought the TV and very happy with everything except for this, which is annoying. Having the optical out from the TV had simplified my setup quite a lot, as my DAC has only one input I'd previously had to use an optical switch.
Some quick searching brought me to this thread. I've contacted Panasonic customer care but they did not appear to undertstand my description. I'll try their technical support.
My DAC can decode the stream from the TV when using the DVB tuner in the telly, BBC iplayer app, ps3 (via HDMI), appleTV via HDMI, Sky box via HDMI. Perhaps others, the only issue is when running Netflix or Amazon.
I connected an old AV receiver of mine and see both the Netflix app and Amazon apps cause Dolby Digital to be output, not PCM as selected. Netflix allows choice of audio, when selecting std (not 5.1) the AV receiver displays Dolby pro logic but I think it does that for all stereo inputs so I cannot verify what signal is being received, just know it's one my DAC cannot decode.
I've already accidentally started a programs on Netflix while my speakers were on without thinking and got the very loud "machine gun" sound described in the earlier post a few times. If the TV is setup to output PCM then I think it should do that, if somehow that's not possible, it should not output Dolby Digital. No sound would be greatly preferable to what's currently happening.
My ps3 and appleTV both output PCM when running the Netflix app, with or without selecting 2 channel audio.
Some quick searching brought me to this thread. I've contacted Panasonic customer care but they did not appear to undertstand my description. I'll try their technical support.
My DAC can decode the stream from the TV when using the DVB tuner in the telly, BBC iplayer app, ps3 (via HDMI), appleTV via HDMI, Sky box via HDMI. Perhaps others, the only issue is when running Netflix or Amazon.
I connected an old AV receiver of mine and see both the Netflix app and Amazon apps cause Dolby Digital to be output, not PCM as selected. Netflix allows choice of audio, when selecting std (not 5.1) the AV receiver displays Dolby pro logic but I think it does that for all stereo inputs so I cannot verify what signal is being received, just know it's one my DAC cannot decode.
I've already accidentally started a programs on Netflix while my speakers were on without thinking and got the very loud "machine gun" sound described in the earlier post a few times. If the TV is setup to output PCM then I think it should do that, if somehow that's not possible, it should not output Dolby Digital. No sound would be greatly preferable to what's currently happening.
My ps3 and appleTV both output PCM when running the Netflix app, with or without selecting 2 channel audio.
whodaresgin said:
Joining the 4K world and I already returned one screen (a Samsung) to get this same Panasonic Model. The picture runs rings around the Samsung and I like the Firefox software "in principle".
However, the inability to downmix to stereo PCM across the board is just sloppy and it is definitely Panasonic's responsibility as the systems integrator.
I have also found that BBC 1 broadcast TV sometimes switches encoding between segments of programming. When it does, the same thing happens and I get the same "machine gun" sound. My TV is only 2 days old and I love the picture, but if this can't be sorted out I may need to change TVs again.
I have been in touch with Panasonic customer service who don't seem to have escalated to Technical support, let alone the engineers. Their response was non-technical and didn't address the issue in any way.
John Duncan
Well-known member
- Jan 8, 2008
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This is unusual - I have found historically that when using optical out on all my TVs (including Panasonic) that everything is downmixed to stereo -except- off air broadcasts (eg Freeview) if the output is set to PCM. Let me have a dig around with your particular model.
John Duncan
Well-known member
- Jan 8, 2008
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This does not solve the TV issue per se, but have you tried selecting a non-5.1 audio track from within the Netflix app?
Hi All, I have this exact problem - nasty "machine gun" sound on optical out of Panasonic TX55CX680B connected to Q Accoustics BT3 speakers (only for Netflix and Amazon). Have tried to hunt down all SPDIF (PCM) settings I can find and changing the sound in the Netflix app to no avail. Any advice gratefully received. Thanks,
Andy
Andy
I have the same problem on my new Pansonic screen. Excellent in every other respect, the PCM (stereo?) down-mix does not appear to work off the television. Anybody had success with an adapter going from Digital audio into digital audio? I don't particularly want to revert to using analogue inputs on my hifi.
I bought a Lindy Dolby Digital converter, have not found anything that will do a Dolby Digital to stereo PCM converstion (and would also need to passthrough PCM). It's a little white box powered by usb that takes the optical in and outputs 2 channel analogue via RCA. Functional and sits in the cabling but doesn't quite fit with my other hifi kit, amp needs turning up over 2-3x to get the same volume when using that input.
This is a real pity for me, I really like the TV except for this issue. I wouldn't mind if it just ouptut nothing if an app writes Dolby Digtial and you've set the output to PCM, but it sends down a signal that causes a really terrible and loud sound to be played which means I cannot have the TV connected to my hifi dac at all just in case someone opened Netflix or Amazon. The TV can decode Dolby Digital as it can play this though the internal speakers and there are not 5.1 speakers inside so it is down mixing, doesn't mean it would be able to output this via the optical out though.
I have been looking to upgrade my amp/dac/speakers and because of this I tried looking for something stereo ( I only want 2 speakers) that would decode dolby digital. The only match I've found is Arcam's SR250 but this is over my budget and has much more features than I need (video for starters). Would make much more sense to replace the new TV with another brand and select from the huge choice of stereo equipment.
This is a real pity for me, I really like the TV except for this issue. I wouldn't mind if it just ouptut nothing if an app writes Dolby Digtial and you've set the output to PCM, but it sends down a signal that causes a really terrible and loud sound to be played which means I cannot have the TV connected to my hifi dac at all just in case someone opened Netflix or Amazon. The TV can decode Dolby Digital as it can play this though the internal speakers and there are not 5.1 speakers inside so it is down mixing, doesn't mean it would be able to output this via the optical out though.
I have been looking to upgrade my amp/dac/speakers and because of this I tried looking for something stereo ( I only want 2 speakers) that would decode dolby digital. The only match I've found is Arcam's SR250 but this is over my budget and has much more features than I need (video for starters). Would make much more sense to replace the new TV with another brand and select from the huge choice of stereo equipment.
I found another similar thread describing this issue on another site and the most recent comment said this had been fixed for the Amazon app and yes I can now have the audio through my hifi DAC when watching content in the Amazon app.
I updated the TV applying the HDR update a few weeks ago, perhaps it's also automatically applied other updates.
Just Netflix to go now.
I updated the TV applying the HDR update a few weeks ago, perhaps it's also automatically applied other updates.
Just Netflix to go now.
Ignore me if this has been mentioned / or is irrelevant (as the thread is a couple of years old!)
But I think I saw someone mention that the Panasonic TV did not have an analogue output.
The good old SCART socket gives stereo analogue out.
But I think I saw someone mention that the Panasonic TV did not have an analogue output.
The good old SCART socket gives stereo analogue out.
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