Although the main key is F major, the frequent use of augmented triads blurs the tonality. The theme wavers, ascending and descending within a second interval, either in chords or octaves. The chords drift as if constantly troubled. The bass line also fails to clarify the tonality. From measure 17, the outer voices are in unison, while the inner voices form chords on the off-beats. From measure 37, accents are used to emphasize anxiety. From measure 47, the recapitulation begins, and in the coda, after the bass repeatedly strikes the dominant, the tonic chord of F major appears for the first time.