Pianos have been with us since 1700 and there are thousands if not millions of compositions using those 88 keys. PIANO DAY, which is officially March 29^th, is being celebrated in events all over the world, with at least one in the Austin area.   But what about the instrument itself?  Steinway VP Matthew Bird stands with one of their older model pianos and talks about the advancements in piano technology including a back to the future player piano.