Krijger
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« on: June 10, 2012, 09:25:01 pm » |
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Hi All,
I'm having an issue with the MED500X2 I just bought. After stopping a movie and (automatically) going back into the mede8er menu (videowall) the mede8er still sends audio to my reveicer. Some sort of a hissing noise. I'm using coaxial digital out and spdif passtrough. Didn't have this problem with the MED500X I have. Is this a hardware related bug or software related? (in other words: should I get back to the store to swap the mede8er? Or can I fix this myself?).
Any thoughts would be appreciated.
Thanks.
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jer1956
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« Reply #1 on: June 10, 2012, 09:52:32 pm » |
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Is your amp on Auto detect? Passthrough is not the same as bitstream. It will be using PCM whenever bitstream is not available. You amp needs to be in a mode where it can flip between the two.
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Krijger
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« Reply #2 on: June 10, 2012, 11:27:59 pm » |
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Yes, my amp is on autodetect (multichannel or stereo). But that's not really the point. The mede8er should stop sending any audio when I stop playing a movie. The old mede8er did anyway. What's the point of sending digital noise?
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Maasbommel
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« Reply #3 on: June 11, 2012, 07:44:14 am » |
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Can you post some more details about the Amp brand and type you are using and audio settings you are using on your Mede8er setup menu?
Maybe there are others around with a simular amp that can give feedback about their experiences with this and we can try to verify with simular settings getting this noise too with coax connection.
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jer1956
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« Reply #4 on: June 11, 2012, 11:56:38 am » |
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Yes, my amp is on autodetect (multichannel or stereo). But that's not really the point. The mede8er should stop sending any audio when I stop playing a movie. The old mede8er did anyway. What's the point of sending digital noise?
It sends out "null" PCM..which means "quiet" to a PCM codec..but could produce hiss or noise to another codec. |
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Krijger
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« Reply #5 on: June 11, 2012, 04:25:54 pm » |
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I got myself a new mede8er today. Checking tonight if this will solve the problem. If the same problem occurs I come back with specs about the setup.
@jer1956: Without being to technical, with the last mede8er I had this problem didn't occur. It also doesn't produce any sound when I haven't just played a file. Only after playing a movie and stopping it the hiss occurs. When I change settings in audio while the hiss is there I hear a short loud noise, like someone unplugged an analog audio cable from a speaker and then the mede8er stops sending the hiss sound. (my amp stops ventilating directly as it doesn't receive any audio anymore)
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Krijger
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« Reply #6 on: June 11, 2012, 07:28:19 pm » |
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So after setting up the new Mede8er the shop got me today the same problem occurs: 100% silence when starting up the mede8er and going through menu's but digital noise after playing a file. Also when audio kicks in or shuts down I hear a loud click through my speakers. (really annoying).
Setup:
Brand new Mede8er MED500X2, without HDD on gigabit network. Latest firmware installed. (2.0.7)
Receiver: Philips HTS 6600 hooked up to coaxial digital out.
TV: Philips PFL9664 HDMI connected
- The sound is fine when playing.
- The problem occurs after audio playback when playback is stopped. (Digital hiss / noise.)
- Loud clicking noise when audio starts or stops.
- Hiss / noise disappears with a loud click when I mess with the audio setup. (e.g. setting hdmi to downmix).
- The problem occurs on two different MED500X2 I tried.
If the mede8er sends "null" (like jer1956 says) over the digital audio connection then why? Why doesn't it just send nothing instead... Mede8er MED500X with the same hardware connected didn't have this problem. No audio resulted in no audio...
Sidenote which may be of any importance: The digital hiss appears at a certain volume only and when turning up the volume the hiss does't get any louder...
Hope this can be resolved with a future firmware update?
Thanks for any response or help.
Appreciated.
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jer1956
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« Reply #7 on: June 11, 2012, 08:31:08 pm » |
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what is happenning to the codec display on the amp? Can you see it changing between codecs?
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Krijger
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« Reply #8 on: June 11, 2012, 09:00:39 pm » |
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Yes, when it receives multichannel audio it shows up on the display with a dts or dolby logo combined with the philips ambisound logo showing it is outputting multichannel audio. When the input changes to stereo they disappear. And so they do. When the playback of a movie stops, the multichannel audio logo's go off. The subwoofer (with dac inside) keeps ventilating though. It only does that when it receives a signal...
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jer1956
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« Reply #9 on: June 11, 2012, 09:10:03 pm » |
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But is it switching to PCM..or Pro logic..when the passthrough stream ends or is paused?
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muckos
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« Reply #10 on: June 11, 2012, 09:54:05 pm » |
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Hi,
had the same Problem for MONTHS with all new Onkyo 2011 Receiver Line! Stopping and Starting movies, with an LOUDe "BANG" from all speakers! Weeks of Testing. Some Users say: Its the fault from the 1085 Realtek chip. The "Muting" went wrong....
My Workearound on Onkyo: When no Movie was playing, switch the Receiver to "Direct".
If you start the Movie, the Receiver automat. switsch to DD or DTs or what ever....No Bang more.
But when you here MP3 then you must manuall switch do DTS NEo or something els back.
Greetings an sorry for my bad english.
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Krijger
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« Reply #11 on: June 11, 2012, 10:17:18 pm » |
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Yes, indeed when I put the receiver in multichannel so it doesn't need to detect what comes in the loud click / bang is gone. But the noise/ hiss is still here after playback... Glad I'm not the only one! Do you hear a noise / hiss too after playback? (try turning the volume up...)
@ jer: my receiver can automatically or manually switch between multichannel or stereo. When it is on automatic switch the Dolby logo's etc. show up when there's multichannel input. They go off when the input is gone or when not multichannel. When I stop playback the Dolby logo's etc go off. I can't see it switching to anything else. But I'm asking: why is it necessary for the mede8er to send anything to my receiver when I stop playback? Again, like I said, the med500x did not have this problem at all...
I bought the med500x2 for better streaming from my nas, but this bug makes the mede8er less pleasant to work with. I'm already thinking of returning it to the shop and put the med500x back to work... 0 problems with that one in my setup.
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jer1956
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« Reply #12 on: June 11, 2012, 10:34:20 pm » |
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The output option is called passthrough..not bitstream. Passthough uses PCM..and adds a flag in the PCM when the contents are a passthough format. Some amps cope better with the flag changing than others.
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Krijger
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« Reply #13 on: June 11, 2012, 10:46:39 pm » |
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Jer, obviously you are a very technical person and unfortunately I'm not... I think we do not really understand eachother or I'm just not understanding you. I do not know anything about PCM, flags or bitstream.
The thing I want to know is why the mede8er is sending audio to my receiver when I stopped playback. Why is this necessary? It doesn't send anything before playback, so why should it send something afterwards? Or am I missing something here...
It seems like a bug that could be fixed with firmware right, or am I wrong?
Thanks again.
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jer1956
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« Reply #14 on: June 11, 2012, 10:50:17 pm » |
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The stream never stops...it either has media data in it, or is Null. It's how it works. It's not a bug..it just creates issues for some amps which don't like passthrough.
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