Or play the keys below, several at once if you like. Whatever you hold gets named and drawn.
The live spectrum of the recorded piano. The dotted lines are where each note's partials should land, worked out from the tuning and stiffness measured in these recordings: a real piano is stretched, flat in the deep bass and sharp at the top, so they sit off the CSV frequencies. Turn sound on and play.
Note names and frequencies: piano_88_keys.csv (88 keys, A4 = 440 Hz equal temperament). String lengths come from this piano's model up to C4, then a typical treble scale; wire gauges are typical values, so tensions are estimates. Inharmonicity and the beats come from the recordings themselves.