I listen to this every few years and love it. I mean, this performance is actually live isn’t it? Sounds somewhat astonishing just how well they play it.
The bit you better bow your head (1:45) it doesn’t look like he’s singing that bit live. That looks like a snazzy mic for 1970 so maybe it picked him up anyway, not sure. It is live isn’t it? Love how bored the audience look.
They are at a Deep Purple show
Here he is!