I heartily agree with Johnny. However good the recorded music, it shouldn't be used as packaging for a live performance - something to stuff in the cracks. This sells the recorded music short as well.

We recently put the incomparable Irish fiddler Tommy Peoples on at the Lewes Saturday Folk Club. I had emails from several people afterwards saying that they'd consciously avoided listening to other music afterwards for hours and even days, because they wanted to keep Tommy's music circling in their minds. This is an extreme example, but I think that if someone had tried to switch on a recording afterwards, even of Tommy himself, murder would have been done.

Valmai