I finally got around to trying my digital delay (which had been out on loan) on my plasma/SKY setup last night to see if I could cure my lip sync issue on terrestrial TV, so here are the results for anyone interested : The delay unit is a 4 year old Alesis Midiverb 3 unit. 19" rackmount that does lots of things just one of which is a straight forward audio delay (anything from 0-500ms). There is a simple bypass button that allows the delay to be turned on and off. I hooked this up in the audio path between SKY and my amp. Just to put this in context I find that the sync gets progressively worse as you get less mainstream i.e. BB1 - Channel 4 are generally OK, Sky One, E4, ITV2 are slightly noticable, MTV, Sci-fi, Discovery and kids channels are very noticable. As ever this is personal opinion and everyone's tolerence to lip sync is different. Since plasmas introduce 80ms delay (I've only ever got that from this forum I hasten to add) I decided to try a variety of delays from 60ms upwards. On most channels I found that a delay of ~120ms pretty much cured the problem for me. I almost instantly found myself concentrating on what was being said instead of whether it was in sync. For BBC1, 120ms had no adverse effect - it was probably putting the picture ever so slightly ahead of the sound and therefore not noticable and for Sky one etc it was putting it either on the nose or just behind, again not noticable. So that setting would work across the board for the channels that I watch. For the more obscure channels the delay was still there and in some cases (stand up UK Living) it needed 250ms delay - a quarter of a second - to compensate! Luckily those aren't parts of the broadcast spectrum that I visit (honest ) but its interesting to see just how bad it is. So for me I think I might look into a discreet delay unit - there are many available on the music market quite cheaply - as this one doesn't look right with my gear (though if anyone is interested in it let me know as it is gathering dust). I might even write to the manufacturer and suggest they make a consumer model as I'm sure they could knock one out for £50 these days, they just don't know that there's a market there.