What's extremely interesting about the system (as I was explaining and demo-ing today) is that it plays exactly what's on the LP. I was playing the Ballet Music of the Opera, and someone was commenting that the trumpets on the Aida march was a bit hard and harsh.
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Well, the thing is - the trumpets are hard and harsh. But not because the speakers are distorting or anything like that. This is something that my sister Carolyn and I know very well, but not a single person in the audience was aware of.
You see, when Verdi composed Aida, concert pitch referenced A=432Hz. In 1936, the American Standards Association recommended that A=440Hz. So, by the time this album was recorded in the late 50's even the International Standards Organization followed the ASA standards.
The Air Force One allows me to flatten the pitch by reducing the speed - the above album played at 32.7rpm (1.6% slow)..... well, you'll have to hear it for yourself
When I played the same track again at a concert pitch that the composer would have used - well, let's just say that
everybody in the audience MUCH preferred it.