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ECM compilation series featuring music selected by the artists themselves from their ECM recordings. These releases do not have the usual ECM catalog number, they are all referenced as ":rarum n" where n is an upper-case roman numeral.
ECM compilation series featuring music selected by the artists themselves from their ECM recordings. These releases do not have the usual ECM catalog number, they are all referenced as ":rarum n" where n is an upper-case roman numeral.