in close proximity to the art-world project of the Theatre of Eternal Music. Cale's departure from the Velvet Underground in 1968 blurred matters considerably, as Reed continued to play primitive figures (sometimes in reference to R&B), while Cale went on to produce Stooges' 1969 debut album, the final mix included his viola drone on the track "We Will Fall". That same year Cale also performed viola on Nico's The Marble Index (1969), on the track "Frozen Warnings". Later, Lou Reed issued in 1975 a double LP of multi-tracked electric-guitar feedback entitled Metal Machine Music which listed (misspelling included) "Drone cognizance and harmonic possibilities vis a vis Lamont Young's Dream Music" among its "Specifications". In the late 1960s and early 1970s, German rock musicians such as Can, Neu!, Kraftwerk, Cluster and Faust drew from 1960s rock groups that experimented with duration and repetition—for example the Velvet Underground, Pink Floyd, and Captain Beefheart at his most collagic—and from composers such as Karlheinz Stockhausen and La Monte Young. These krautrock groups influenced art rock contemporaries in their own day and punk rock and post-punk players subsequently. Tony Conrad, of the Theatre of Eternal Music, notably made a collaborative LP with Faust which included nothing but two sides of complex violin drones accompanied by a single note on bass guitar and some percussion. Single-note bass-lines also featured on Can's track "Mother Sky" (album Soundtracks, 1970) and the entirety of Die Krupps's first album (1979). British band Spacemen 3 recorded a live 45-minute drone album entitled Dreamweapon: An Evening of Contemporary Sitar Music, with liner notes by La Monte Young. New age, cosmic and ambient music Across North America and Europe, some musicians sought to reconcile Asian classicalism, austere minimalism and folk music's consonant aspects in the service of spirituality. Among them was Theatre of Eternal Music alumnus Terry Riley, with his 1964 In C. Along with La Monte Young and Zazeela, Riley had become a disciple of the Hindustani classical singer Pandit Pran Nath. In parallel, then-Krautrock band Tangerine Dream and its recently departed member Klaus Schulze moved toward a more contemplative and consonant harmonic music, each releasing their own drone music album on the label Ohr in August 1972 (Zeit and Irrlicht, respectively). Throughout the 1970s, Irv Teibel released his psychoacoustic Environments series, which consisted of 30-minute, uninterrupted environmental sound and synthesized soundscapes ("Om Chant" and "Tintinnabulation"). Meanwhile, as an increasingly elaborate studio