'Chry-Ptus' (1971). Originally two tapes which are to be played simultaneously, with or withour synchronisation, which does not affect the structure of the work, but creates changes in the game of sub-harmonics and overtones. Three variations on this piece were performed at the New York Cultural Center in 1971, with variations of amplitude and location modulation as well as synchronisation. Realised on the Buchla Synthesizer at the New York University. The booklet contains a text by painter Paul Jenkins, who also realised the watercolor on the front cover, written on occasion of Radigue's first concert in New York, April 6th, 1971. CD 1 : 'Chry-Ptus I' (1971). 'Chry-Ptus', version 2001, realised by Eliane Radigue with the assistance of Stefano Bassanese at CCMIX, Paris. CD 2 : 'Chry-Ptus II' (1971). 'Chry-Ptus', version 2006, realised by Giuseppe Ielasi, Milano.

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