Piano Roll — Bach, Prelude in C Major BWV 846, Bars 1–4

The opening four bars of the first prelude of The Well-Tempered Clavier, Book I: each half-bar holds a bass note for two beats and the second note from the second sixteenth, while the upper three notes arpeggiate twice. The harmony — C, Dm7/C, G7/B, C — is legible as the stacked colours.

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title "Bach — Prelude in C, BWV 846, bars 1–4"
tempo 66
time 4/4
beats 16
# Dark: held bass. Mid: held second voice. Light: sixteenth-note figuration.
note C4 at 0 length 2 color "#1e3a8a"
note E4 at 0.25 length 1.75 color "#2563eb"
note G4 at 0.5 length 0.25 color "#60a5fa"
note C5 at 0.75 length 0.25 color "#60a5fa"
note E5 at 1 length 0.25 color "#60a5fa"
note G4 at 1.25 length 0.25 color "#60a5fa"
note C5 at 1.5 length 0.25 color "#60a5fa"
note E5 at 1.75 length 0.25 color "#60a5fa"
note C4 at 2 length 2 color "#1e3a8a"
note E4 at 2.25 length 1.75 color "#2563eb"
note G4 at 2.5 length 0.25 color "#60a5fa"
note C5 at 2.75 length 0.25 color "#60a5fa"
note E5 at 3 length 0.25 color "#60a5fa"
note G4 at 3.25 length 0.25 color "#60a5fa"
note C5 at 3.5 length 0.25 color "#60a5fa"
note E5 at 3.75 length 0.25 color "#60a5fa"
note C4 at 4 length 2 color "#1e3a8a"
note D4 at 4.25 length 1.75 color "#2563eb"
note A4 at 4.5 length 0.25 color "#60a5fa"
note D5 at 4.75 length 0.25 color "#60a5fa"
note F5 at 5 length 0.25 color "#60a5fa"
note A4 at 5.25 length 0.25 color "#60a5fa"
note D5 at 5.5 length 0.25 color "#60a5fa"
note F5 at 5.75 length 0.25 color "#60a5fa"
note C4 at 6 length 2 color "#1e3a8a"
note D4 at 6.25 length 1.75 color "#2563eb"
note A4 at 6.5 length 0.25 color "#60a5fa"
note D5 at 6.75 length 0.25 color "#60a5fa"
note F5 at 7 length 0.25 color "#60a5fa"
note A4 at 7.25 length 0.25 color "#60a5fa"
note D5 at 7.5 length 0.25 color "#60a5fa"
note F5 at 7.75 length 0.25 color "#60a5fa"
note B3 at 8 length 2 color "#1e3a8a"
note D4 at 8.25 length 1.75 color "#2563eb"
note G4 at 8.5 length 0.25 color "#60a5fa"
note D5 at 8.75 length 0.25 color "#60a5fa"
note F5 at 9 length 0.25 color "#60a5fa"
note G4 at 9.25 length 0.25 color "#60a5fa"
note D5 at 9.5 length 0.25 color "#60a5fa"
note F5 at 9.75 length 0.25 color "#60a5fa"
note B3 at 10 length 2 color "#1e3a8a"
note D4 at 10.25 length 1.75 color "#2563eb"
note G4 at 10.5 length 0.25 color "#60a5fa"
note D5 at 10.75 length 0.25 color "#60a5fa"
note F5 at 11 length 0.25 color "#60a5fa"
note G4 at 11.25 length 0.25 color "#60a5fa"
note D5 at 11.5 length 0.25 color "#60a5fa"
note F5 at 11.75 length 0.25 color "#60a5fa"
note C4 at 12 length 2 color "#1e3a8a"
note E4 at 12.25 length 1.75 color "#2563eb"
note G4 at 12.5 length 0.25 color "#60a5fa"
note C5 at 12.75 length 0.25 color "#60a5fa"
note E5 at 13 length 0.25 color "#60a5fa"
note G4 at 13.25 length 0.25 color "#60a5fa"
note C5 at 13.5 length 0.25 color "#60a5fa"
note E5 at 13.75 length 0.25 color "#60a5fa"
note C4 at 14 length 2 color "#1e3a8a"
note E4 at 14.25 length 1.75 color "#2563eb"
note G4 at 14.5 length 0.25 color "#60a5fa"
note C5 at 14.75 length 0.25 color "#60a5fa"
note E5 at 15 length 0.25 color "#60a5fa"
note G4 at 15.25 length 0.25 color "#60a5fa"
note C5 at 15.5 length 0.25 color "#60a5fa"
note E5 at 15.75 length 0.25 color "#60a5fa"