A live recording in 2020 at AXART in Los Angeles of Eliane Radigue's first acoustic composition, investigating the physical properties of resonating bodies and dynamic systems, composed in 2005 in collaboration with West Coast cellist Charles Curtis, who also performed on the original 2006 recording at Rglise de Notre-Dame de Bon Secours in Paris that is included in this 2-CD set.

The first release of electronic composer Éliane Radigue's 1980 live session for the Bay Area's KPFA radio, performing two works: a studio performance of "Chry-ptus", Radigue's work for asynchronous recordings on a Buchla Modular System; and the world premiere of Parts I through III of "Tryptych", an hallucinogenic work of sound and texture.

Commissioned by Organ Reframed, the organ-only experimental music festival curated by Scottish composer/performer and London's Union Chapel organ music director Claire M Singer, this piece of deep overtones ascending through octaves was developed with organist Frédéric Blondy at the Église Saint Merry in Paris, this specially packaged release captured at the Union Chapel festival concert in 2020.

Eliane Radigue received a grant from the French Government to compose these works, realized between 1981 and 1983 in her Paris analog studio on Arp synthesizer, with vocal submission from Robert Ashley and Tibetan teacher Lama Kunga Rinpoche, composing five songs in tribute to the Tibetan saint and poet from the eleventh century, Jetsun Milarepa.

French electroacoustic composer and innovator Eliane Radigue's final work made with feedback material from 1970, five pieces that strip away at the familiar, deconstructing and decomposing classical works into mesmerizing drones, or creating rich pulsating works of sound with intense harmonic development and controlled feedback, a powerful opus of sound.