In terms of chords and melody, Knock has complexity on par with the typical song, having near-average scores in Chord Complexity, Chord-Melody Tension, Chord Progression Novelty and Chord-Bass Melody and below-average scores in Melodic Complexity.
Knock has sections analyzed in the following keys: F Major, and F Dorian. Click on the linked cheat sheets for popular chords, chord progressions, downloadable midi files and more!