American rock group led by Mayo Thompson. Has collaborated with Art & Language and Jim O'Rourke. Thompson was also once a member of the group Pere Ubu (above). Red Noise, French rock group led by Patrick Vain (see below). Not to be confused with Bill Nelson's Red Noise. Reform Art Unit, Austrian jazz ensemble founded by , , and and Kristin Novotny. Steve Reich, American composer and musician. Achim Reichel, German guitarist and leader of the group A.R. & Machines. The Residents, American group. Catherine Ribeiro + Alpes, French avant-rock group. Boyd Rice, American musician and creative force behind NON. Terry Riley, American composer and musician. Ritual ALL-7-70, American group led by Alan Sondheim. Claudio Rocchi, Italian musician. , Italian jazz-rock group. Ron 'Pate's Debonairs, American performance-rock group featuring Fred Lane. Roth, Rühm, & Wiener, see Selten Gehörte Musik (below). Ray Russell, British guitarist. Terje Rypdal, Norwegian jazz guitarist. S Martin Saint-Pierre, Argentinian percussionist. Samla Mammas Manna, Swedish rock group. , German guitarist. Second Hand, British rock group. also see Chillum (above). , Danish rock group. Seesselberg, German electronic duo of Eckart and Selten Gehörte Musik, Austrian group featuring Dieter Roth, Gerhard Rühm, and . Part of the Viennese Actionism art movement which also included Rudolf Schwarzkogler and Hermann Nitsch. Semool, French rock group. Sonny Sharrock, American jazz guitarist. Silberbart, German rock group. Siloah, German rock group. Smegma, part of the Los Angeles Free Music Society. LaDonna Smith and Davey Williams, American musicians and founders of the Trans Museq record label. Sally Smmit, project of Sally Timms who is a member of the British group Mekons. Alan Sondheim, see Ritual All 770 (above). Snatch, American duo of Judy Nylon and Patti Palladin. Has worked with Brian Eno. Soft Machine, British rock group. , Finnish group led by Pekka Airaksinen (see above). Sphinx Tush, German group that became Tomorrow's Gift' (see below). Only recorded one song (but appears in two different versions). Karlheinz Stockhausen, German composer and pioneer of electronic music. Stooges, American rock band. Demetrio Stratos, Greek singer and musician. Was a member of the Italian group Area (see above). , Dutch rock band. T Taj Mahal Travellers, Japanese group led by Takehisa Kosugi. , French singer. Tangerine Dream, German group. Ghédalia Tazartès, French composer and musician. Technical Space Composers Crew, duo of Holger Czukay and Rolf Dammers. Holger later went on to join Can (see above). , French singer.