Thanks for the link, fastlane, that's a fascinating recording. It's too bad that Moreschi was so old when this recording was made, but it does give us a framework to imagine what these guys must have sounded like in their prime. It really is a surreal sound, and unlike anything to which our modern ear is accustomed. The countertenors of today sometimes come close, but Moreschi's sound is devoid of that flutelike falsetto quality--in fact, in the lower voice, it sometimes almost sounds vaguely tenorial. The ease of the tone is beguiling as well, and even in his old age Moreschi shows glimmerings of that fabulous agility for which the castrati were renowned.
Anyway...very interesting indeed. Thank you again for posting this, it made my morning.