A signature collection of exquisite works for onde Martinot and piano by Olivier Messiaen, N'Guyen Thien Dao, Jacques Charpentier and Tristan Murail, exploring the many voices of this extraordinary instrument. The onde (or ondes musicales or le Martenot) was first demonstrated at the Paris Conservatoire in 1928 and immediately attracted the attention of Varese, Milhaud, Koechlin, Jolivet, Honegger and Messiaen, who all wrote for it - cumulatively ensuring its survival. Although only a year younger than the theremin, the onde is a far more sophisticated, complex and versatile instrument, not least because of the combination it offers of pitched and glissando tones, and the wide range of filters and different resonating media through which it can sound: loudspeakers, gongs, sympathetic resonating strings and reverberant enclosures. The compositions here exploit every unearthly aspect of the instrument and are beautifully performed: a remarkable and exquisite collection.