<HTML>Tune the Piano normal when the Organ cools down it will go flat and warms up goes sharp which is the opposite of a piano. It should have been tune when the room was at 72%. The organ will also change pitch more drasticly when the tempature does change. I have tuned in several churches that have pipe organs. I don't change the pitch of the piano unless I have been requested to. Alan Meyer Associate Las Vegas</HTML>