Due to John Austins review I was very confident concerning the technical quality of this recording. Today I got the CDs and am utterly disappointed.
Although Naxos mentions that it has been restored to remove crackle and disturbing sound it is simply not true. Already to listen to the ouverture is thus a torture. And the the famous aria Pace gran dio is not "listenable".
The whole recording seems to have been taken directly from a Schellack record or a bad broadcast resource without any restauration.