On March 21, 2017 at 16:50, BobL said...
In most situations the audio needs to be delayed because the video processing takes longer than the audio processing. Most receivers have a delay setting for this situation, in fact in HDMI 1.3 and above there is an automatic lip-sync function. When using a Sonos connect through its line in, the Sonos needs to convert the audio signal to digital and make sure it can be time aligned if being sent to multiple Sonos devices. This processing makes the audio lag behind the video and no display that I know of has a setting to delay the video to match the audio.
So...
In devices other than Sonos devices, the audio leads the video. Audio delay must be added to synchronize the signals.
In Sonos devices, audio delay is introduced which makes the audio lag (always?) behind the video signal.
What exceptions do we know of?
