Does 'So it wasn't Missenhardt's singing--marvelous though that was--that made Osmin's rantings so thrilling.' exist in a separate context from 'Osmin was going off on a rant.', without logical interdependence?
So it wasn't Missenhardt's singing--marvelous though that was--that made Osmin's rantings so thrilling.###Osmin was going off on a rant.