A German theorist of a slightly later period, Franco of Cologne, was the first to describe a system of notation in which differently shaped notes have entirely different rhythmic values (in the Ars cantus mensurabilis of approximately 1280), an innovation which had a massive impact on the subsequent history of European music.
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Artists who have recorded for the Edelweiss Emission label include the Argentine classical pianist Daniel Levy (classical pianist), the baritone and conductor Dietrich Fischer-Dieskau, the Philharmonia Orchestra, the baritone Wolfgang Holzmair, the Polish-Italian cellist Franco Maggio Ormezowski, the ensemble Ars Antiqua de Paris and the sitarist, Ravi Shankar.