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TV to Arc via HDMI, Arc wirelessly to Sub, SL’s (one room) and Amp (another room) and passives wired to Amp. The sound is echoey when the Amp is on and grouped with the Arc. Is this because of delay and how do I fix. My network is super fast and the Arc and Amp are within a couple feet of each other. If indeed the wireless setup is the issue, what’s an alternate setup? 

The echo is inevitable when playing TV sound because the HT surrounds have negligible lag in order to sync with the Arc and hence the video.  The key aim is to avoid lip sync issues.  However, when rooms ae grouped a larger buffer is required in order to achieve perfect sync between rooms.   So you cannot sync audio and video and two rooms at the same time.  Possible solutions:

  1. If you are listening to TV sound in the Amp room and so cannot see the video, mute the HT room
  2. Use the TV Dialog Sync setting on the Arc to delay the audio on the Arc.  You should be able to eliminate the echo, but at the cost of increasing audio - video lag

Note that this only applies to TV sound.  Music sources will play across the two grouped rooms in perfect sync.

So, I connected my Sonos amp to my tv and paired 2 fives and a sub to create a jukebox type experience and play music from the spotify app on my tv, but I still get an echo sound.  Is there anything you recommend I do?

So, I connected my Sonos amp to my tv and paired 2 fives and a sub to create a jukebox type experience and play music from the spotify app on my tv, but I still get an echo sound.  Is there anything you recommend I do?

 

Two things you can do.  Use the Spotify app or the Sonos app to play the music (music sources have no delay) or adjust the “TV Dialog Sync” in the Amp settings so the Amp is in sync with the Fives.  Note: delaying the Amp is going to cause lip sync issues when you watch TV sources that need to be in sync with the video. 

Thanks for the feedback jgaite, I will give it a try.

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