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Deadmau5 has this grand piano retrofit with some epic midi thing that allows him to send MIDI out from his computer into the Steinway and then has a mic hooked up to it going through some reverb then back into the interface. Boom, MIDI controlled Steinway FTW. Joel mentions in [this article](http://www.torontolife.com/informer/features/2011/11/01/man-in-the-mouse-deadmau5-profile/6/) that the concert grand piano is a Model D that is autographed by both Harry Connick Jr. and Josh Groban.more
In 1972-1973 At Trident, they used the studio house Steinway piano (surely a D model, 8' 11 3/4" Concert Grand). Considering they recorded downtime and probably couldn't bother setting their equipment, it's also very possible that Roger had to use whichever drums were in the studio at the time (i.e. Hayman or Ludwig) instead of bringing his own. The famous Marquee photo shows a white piano in the corner, it could be the famous Bechstein used by Fred 3 years later on Bo Rhap, considering the Marquee club was also (AFAIK) having some sort of special deal with Jacques Samuel (where the white Bechstein would also be rented from).more