(29 mai 1771 – 31 déc. 1771)
Description:
Johann Zumpe’s design of piano was expanded greatly by English inventor John Broadwood, who added more octaves to cover treble and bass, added pedal and strings were much more robust and lauder.Ajouté au bande de temps:
Date:
29 mai 1771
31 déc. 1771
~ 7 months