There are options to adjust lip sync in the app, but there seems to be a significant delay in the audio by default. At least there was with the analogue input. I connected a microphone to the line inputs via a mixer since I was about to test the microphone, and there was a marked delay between my real voice and the sound of it appearing from the speakers.
If your TV does not support HDMI ARC, don’t worry. Sonos includes an adaptor of a kind entirely new to me. This has a plug to go into the optical digital audio output of your TV. At the other end is an inline HDMI socket. Somehow, this device converts optical digital audio into electrical digital audio carried by HDMI. I didn’t even know that the HDMI connection must carry a modest amount of current to power this activity.
My TV is fine with ARC, but it did get me to wondering. Could I use some other device? I pulled out my old Denon CD player – this one’s over twenty years old now, but still works perfectly well. It has an optical digital audio output. I plugged the adaptor in, powered it up and set a disc spinning. Yes, CD audio was now coming from the speakers.
Just another usage option for those who choose the Sonos Amp.
Well, as bit of a high-fidelity nerd from way back, I was a little disappointed about the lack of support for high resolution audio. That said, I am also fairly confident that higher sampling rates don’t actually deliver audible improvements. The main problem with the lack of high resolution support is that if, for some reason, you have accumulated a lot of high resolution music, and don’t have standard resolution versions of it, you won’t be able to use it in your Sonos system. Without, anyway, tediously converting it to lower resolution.
Were DLNA supported that might not have been a problem. Many DLNA servers – including that on my Synology NAS – can down-sample audio on the fly. But no DLNA means no access to that facility.
Still, enough of my obsessions. The Sonos Amp is a real winner if you have a virtual library full of CD-standard music in FLAC, AIFF, Apple Lossless, MP3, or if you just like streaming online sound. Sonos provides a mature and effective multiroom system. The Sonos Amp itself is well engineered and fit for use with first class loudspeakers.