The glorious spectrum of orchestral colour is refracted through a combination of four of the most brilliantly original voices in twentieth century music. Two evocatively-titled unconventional concertos are set against Messiaen’s glittering primary colours and the effortless symmetry and rich, burnished grandeur of Sibelius’ ingenious symphony. Murail’s 2012 work was described by the New York Times as ‘an elemental, shimmering mass of layered sounds, nuanced colours and stacked up harmonies’ after its American premiere, and Janáček’s mini-concerto makes the perfect counterweight, sparse, raw, but lyrical and earthily impassioned.