20c: Ligeti - Atmospheres / Various

Atmosphères is a piece for full orchestra, composed by György Ligeti in 1961. It is noted for eschewing conventional melody and metre in favor of dense sound textures. After Apparitions, it was the second piece Ligeti wrote to exploit what he called a "micropolyphonic" texture. It gained further exposure after being used in Stanley Kubrick's film 2001: A Space Odyssey.

Lux Aeterna is a piece for 16-part mixed choir, written by György Ligeti in 1966. It is most famous for its use in Stanley Kubrick's 1968 film 2001: A Space Odyssey.The text (in Latin) is from the Roman Catholic Requiem Mass: Lux aeterna luceat eis, Domine, cum sanctis tuis in aeternum, quia pius es. Requiem aeternam dona eis, Domine; et lux perpetua luceat eis, which means "May everlasting light shine upon them, O Lord, with thy saints in eternity, for thou art merciful. Grant them eternal rest, O Lord, and may everlasting light shine upon them." The piece features many of Ligeti's characteristic styles, including Micropolyphony, which Ligeti describes as "The complex polyphony of the individual parts[,] embodied in a harmonic-musical flow in which the harmonies do not change suddenly, but merge into one another; one clearly discernible interval combination is gradually blurred, and from this cloudiness it is possible to discern a new interval combination taking shape."

Cluster chords, where every note within a given interval is sung simultaneously

A focus on timbre instead of melody, harmony, or rhythm