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