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.