It's not just instruments that have changed over the centuries, but playing techniques. By looking at instructional handbooks on how to play the piano from the early 19th Century, this woman has discovered how the different techniques lead to actually different musical sounds and impressions. Very cool.
(h/t +Yonatan Zunger)
Playing Mozart’s Piano Pieces as Mozart Did – The New York Times
A music scholar plays classical piano pieces with techniques that 19th-century performers learned, producing a markedly different effect that researchers are studying.