The human voice ‘riding upon waves of rippling sound’ was the starting point for the glittering, pulsing soundscapes of John Adams’s Harmonium – one of the American composer’s defining works, harnessing the motoric energy of Minimalism to large-scale architectural form and textural richness. Commissioned by the BBC in 1947, Poulenc’s Sinfonietta is a typically playful, nose-thumbing riff on the traditional symphony, full of wit and brilliance – a mood it shares with the composer’s joyful, Mozart-inspired Concerto for two pianos. ‘Breathtaking’ Dutch siblings Lucas and Arthur Jussen make their Proms debut, joined by the CBSO and Music Director Kazuki Yamada.