Question

Problemer med syncing/gruppering av lyd fra TV

  • 27 April 2019
  • 3 replies
  • 1915 views

Har to soner som er tilkoblet TV’er via optisk. Den ene via en playbar og den andre via sonos amp. Når jeg prøver å gruppere disse sonene med andre sonosenheter så opplever jeg at de andre enehetene faller ut fra tid til annen. De gangene jeg spiller musikk (dvs ikke TV-lyd) så fungerer grupperingen helt fint. Noen andre som har opplevd dette problemet?

3 replies

Translation...
Have two zones connected to TVs via optical. One via a playbar and the other via sonos amp. When I try to group these zones with other sonos units, I find that the other units fall out from time to time. The times I play music (ie no TV sound) the grouping works just fine. Anyone else who has experienced this problem?

Reply...
Yes, this is because the TV audio is delivered to the Playbar and/or Amp with minimum/virtually no buffering in order to keep the audio in perfect-sync with the video that’s showing on screen. That’s also why the faster 5ghz WiFi band is used to deliver the Surround audio to any speakers “bonded” to the main player.

However the Sonos speakers, in general, use the 2.4ghz WiFi band for audio playback and there is approx ~70ms delay, as the audio is buffered in order to keep the playing audio in sync across “grouped” rooms.. so there is a difference between TV audio playing across 'grouped' rooms.

The good news is, if you Goto to the “Room Settings” in the Sonos App for your Playbar main player ... you can adjust the playing TV audio. Goto “Advanced Audio/TV Dialog” and slide the lip-sync slider bar over to the right hand side and with a bit of luck you maybe able to get all speakers in sync with no noticeable echo. The only issue you may find is that the audio may then be slightly behind the video on screen. In some cases, you may see the delay is hardly noticeable, so just try it and see if it works for you.

Hope that helps.?

Svar Oversettelse ...
Ja, dette er fordi TV-lyden leveres til Playbar og / eller Amp med minimal / nesten ingen buffering for å holde lyden perfekt synkronisert med videoen som vises på skjermen. Det er også grunnen til at det raskere 5ghz WiFi-bandet brukes til å levere Surround-lyden til alle høyttalere "bonded" til hovedspilleren.

Men Sonos høyttalere bruker generelt 2,4ghz WiFi-bandet for lydavspilling, og det er ca. 70mars forsinkelse, da lyden er buffet for å holde lyden i synkronisering over "grupperte" rom .. så det er en forskjell mellom TV-lyd som spilles over "grupperte" rom.

Den gode nyheten er at hvis du går til "Rominnstillinger" i Sonos App for din Playbar-hovedspiller ... kan du justere lyden som spilles av TV. Gå til "Avanserte Audio / TV Dialog" og skyv glidebryteren til lip-sync over til høyre side, og med litt flaks kan du kanskje få alle høyttalere synkronisert uten merkbart ekko. Det eneste problemet du kan finne er at lyden kan være litt bak videoen på skjermen. I noen tilfeller kan du se forsinkelsen er knapt merkbar, så prøv det og se om det fungerer for deg.

Håper det hjelper.?
Hi Ken. thanks for your answer!
Seems you are more describing the echo issue that arises when TV sound through optical has some delay. i have already adjusted for that, What I am experiencing is that the connected zone (to main TV zone) falls out and in with sound. However, I have tested a bit, and a workaround seems to be to first join the zones before feeding the TV sound. My issue has been when I first run TV sound on main zone connected via optical, and then connected another zone.
As far as I’m aware, the audio output should normally be the same, whether you Group the speakers before, or after, you start playing the TV audio, but I am aware that the audio delays from different video sources can vary, for example PCM stereo audio on a UK terrestrial standard TV channel has less delay than a Dolby Stereo signal from a cable TV Channel and there’s even more delay when playing a 5.1 Netflix source from an App built into a TV etc. ...so I find I sometimes have to move the lip-sync slider bar depending on the source that is being played.

I also understand that adding additional Sonos Rooms into the mix, can also alter timings. Presumably the more Sonos rooms added, the more things have to also contend with the available network bandwidth.

For music sources, it’s not a big issue of course, as there is no video to have to stay in lip-sync with, but the various TV sources need to stay in sync and they do vary ...and so they can present problems from time to time.

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