The first picture below shows the piano at home with my old IBook running Garage band. The second picture show the piano with Ruth. The third picture shows the piano in action. The movie to the left shows the piano in action too. Ruth plays (with some help of built in demo songs).

Yamaha Nocturne 100 Piano
Ruth Knill sitting near piano
Oliver Knill playing the piano

Oliver Knill, Department of Mathematics, Harvard University, One Oxford Street, Cambridge, MA 02138, USA. SciCenter 432 Tel: (617) 495 5549, Email: Quantum calculus blog, Twitter, Youtube, Vimeo, Linkedin, Scholar Harvard, Academia, Google plus, Google Scholar, ResearchGate, Slashdot, Ello, Webcam, Spring 2018 office hours: Mon-Fri 4-5 PM and by appointment.