[URL]http://www.kempa.com/blog/archives/000053.html[/URL]
A friend of mine had the Pete Shelley lp and a Spectrum, but we couldn't get the programme to work. I think the snaps and crackles interfered too much... I'm sure we didn't miss much though!
I dunno about all that, but I love the site about locked grooves etc; I have a few LPs other than the obvious Sgt Pepper that have locked grooves, including the first one I ever heard - the Muppet Show, Volume 2 (he eh!).