Left to right: (a) Chord chart notation for guitar; (b) Henry Purcell, “Dido’s Lament” from Dido and Aeneas in figured bass notation, ca. 1968; (c) Hymn tune for the text “Come Thou Fount of Every Blessing” (1758) by Robert Robinson in Nashville number system notation, nineteenth century; and (d) Thelonious Monk, Off Minor in lead sheet notation, 1947.
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