Asmus Tietchens (born 3 February 1947, Hamburg), who also records under the monikers Hematic Sunsets and Club of Rome, is a German composer of avant-garde music.Tietchens became interested in experimental music and musique concrète as a child, and began recording sound experiments in 1965 with electronic musical instruments, synthesizers and tape loops. In the 1970s he met producer , and the two formed a decades-long partnership. Peter Baumann (of Tangerine Dream) heard a recording of Tietchens' music and offered to produce an album; the result was Nachtstücke, Tietchens' 1980 offering on . His early recordings feature more accessible synthesized music, but beginning with Formen Letzer Hausmusik, his 1984 release for Nurse With Wound's label , he began moving toward more abstract sound col