Critic and Hear and Now presenter Ivan Hewett nominates Hungarian composer Gyorgy Kurtag's Officium Breve in memoriam Andreae Szervanszky for string quartet. With commentary from writer Paul Griffiths.

Singer and conductor Paul Hillier celebrates Terry Riley’s icon of musical minimalism and monument to the experimental atmosphere of 60s West Coast America, In C. With commentary from Richard Bernas.

Composer and Hear and Now presenter Robert Worby singles out V of IV, an early electronic work by American pioneer Pauline Oliveros; author and journalist Rob Young provides the background to this period of her work, and we also hear from the composer herself.

Gavin Bryars's mould-breaking 1971 score Jesus' Blood Never Failed Me Yet is a work which came about almost accidentally, when Bryars found a recording of an elderly homeless man singing lines from a Victorian hymn. Cultural historian Robert Hewison makes the case for why the work is important, and commentary comes from author and musician David Toop.

Four Tet’s Kieran Hebden explains why Silver Apples of the Moon by the American composer Morton Subotnick stands out for him as a classic of early electronic music. Author and journalist Rob Young provides some background to the work, which was created on a Buchla synthesizer at the San Francisco Tape Music Center, and conceived specifically for two sides of an LP.

Cellist Frances-Marie Uitti celebrates the music of Giacinto Scelsi, the Italian composer from an aristocratic background whose work looks to the East for inspiration. Ygghur is Sanskrit for catharsis and is the final part of Scelsi's autobiographical La Trilogia. With commentary from Paul Griffiths.

Pianist Pierre-Laurent Aimard champions the music of maverick German composer Helmut Lachenmann and his 1980s work for ensemble Mouvement (- vor der Erstarrung); conductor Richard Bernas explains how the use of unconventional playing techniques created a rich and highly crafted soundworld the composer has described as "musique concrete instrumentale".

Violinist Alexander Balanescu recounts his part in Michael Nyman's groundbreaking score for Peter Greenaway's 1982 feature film The Draughtsman's Contract; while commentator Gillian Moore links Nyman's work to the British experimental music tradition.

Author Paul Griffiths singles out this early work for ensemble by Danish composer Hans Abrahamsen, a sonic evocation of nature which takes its name from a poem by Georg Trakl; Gillian Moore highlights some of the other influences at work, including the pictures of M.C. Escher, one of the piece’s dedicatees.

The soprano Barbara Hannigan celebrates Claude Vivier’s profoundly moving work for soprano and orchestra, Lonely Child. Vivier conceived the piece as one single melody, with the entire orchestra "transformed into a timbre", to create "great beams of colour". Writer Paul Griffiths explains how Stockhausen, Gregorian chant and the traditional music of Bali all contributed to this composer’s distinctive soundworld.