I've bought another device to do this. A Blustream embeddder/de-embedder.
Slightly more expensive, larger and is mains powered so yet another wall
wart to find a home for. Digital and analogue audio out, but only analogue
in. It has a load of DIL switches for various video signals, but worked on
the default settings. Just as well, as the instructions talk about signals
I've never heard of, and there are 16 choices.

--
*A nest isn't empty until all their stuff is out of the attic

Dave Plowman London SW
To e-mail, change noise into sound.