Mediaeval music

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Across
  1. 3. Second significant composer of polyphonic choral music, expanded upon previous works
  2. 5. French composer of late mediaeval period, composer of secular music
  3. 7. multiple simultaneous lines of melody
  4. 8. Founder of modern music staff and note length system
  5. 9. First significant composer of polyphonic choral music
Down
  1. 1. Sacred, polyphonic composition with complex structure
  2. 2. variant of plainchant developed during the reign of Pope Gregory I
  3. 4. travelling musician, composer of ballads
  4. 5. one line of melody
  5. 6. music intended for a non-religious audience