The opening movement begins with the solo clarinet imitating a blackbird's song and the violin imitating a nightingale’s song. The underlying pulse is provided by the cello and piano: the cello cycles through the same five-note melody (using the pitches C, E, D, F-sharp, and B-flat) and a repeating pattern of 15 durations. The piano part consists of a 17-note rhythmic pattern permuted strictly through 29 chords, as if to give the listener a glimpse of something eternal.