The ensemble has also reached outside these areas to perform very early music (organa by the twelfth-century French composer Perotinus) and very recent music (new works by the Australian Elliott Gyger).
Léonin (fl. 1150s — d. ? 1201), the first known significant composer of polyphonic organum;
The Organum Mathematicum was an information device or teaching machine that was invented by the Jesuit polymath and scholar Athanasius Kircher in the middle of the 17th century.
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The Organum Mathematicum was later described in a 1668 book of the same title by Gaspar Schott, who was Kircher's pupil.
Snatch Tapes was part of the then burgeoning cassette culture scene and also released tapes by David Jackman (later of Organum), and Claire Thomas & Susan Vezey as well as tracks by the Lemon Kittens, Alien Brains, Cultural Amnesia and the Beach Surgeons (led by a young Graham Massey, later of 808 State).