A rising line is a central figure in the opening. A four-introduction is followed by a thirty-two bar period that forms the waltz's first strain. The 16-bar antecedent phase, bars 5-20, brings a line very gradually up from D5 (doubled with D4) but it is broken after the F5 in bar 19 by a surprise harmonic break to a Neapolitan (G minor: an Ab6 chord) in bar 20, after which the consequent phase begins and plods along, becoming more and more insistent and finally pounding out the concluding notes of the rising line.
The coda follows directly on the repetition of the fortissimo cadences in the reprise and takes a classic coda form with "reminiscences" over a tonic pedal point. Note that the octaves, having fulfilled their role, are gone, and we hear the alto's tune, still in the middle of the texture.