您要查找的是不是：
- self-acting piano link regulator (清棉機的)天平桿自動均勻裝置
- 史蒂夫·里奇和他的《鋼琴相位》(Piano Phase,1967)Steve Reich and His Piano Phase
- 這跟聽別人彈鋼琴不一樣,那你能參地進去共同欣賞,攝影這玩意兒,製作和表演之間要隔很長時間。It's not like listening to someone practice the piano, where you can be part of it.In photography, production and performance are separated by a long time span.
