One of the earliest German Krautrock acts which debuted alongside Amon Düül's "Phallus Dei" and Can's "Monster Movie" in the year 1969 was the Osnabrück based TRIKOLON which released its sole album the very same year but has not enjoyed the same resurgence of interest. Unfortunately this band has fallen into the obscurity bins with only rare collectors giving it any consideration at all. TRIKOLON was the predecessor of the longer-lived Tetragon which produced three albums in the early 1970s. Formed by keyboard virtuoso Hendrik Schaper who also added vocals and trumpet sounds on TRIKOLON's one and only album CLUSTER, this band that also included Rolf Bettberg on bass and Ralf Schmiedling on drums has mostly been obscure due to the fact only 100 copies of its album were pressed and sold at live shows. Presumably this entire album was recording in a live setting.