Three fictitious characters (P, M, and their musical
friend MF) continue their enthusiastic search in trying to unravel
the mystery of timing in music performance. This time they find
out about the kinematic approach to expressive timing, and discuss
the possible relation between motion and music.
That morning MF's kitchen turned into a real
workshop. "Can we use one of your music boxes?" P asked
sheepishly. With some hesitation MF collected one of his
beloved machines from the living room. And after some hours of
trifling and hammering they had built it--a "true" physical model of constant braking force!