Anotha one!

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Across
  1. 4. A woodwind instrument with a single reed
  2. 6. The distance between two notes
  3. 11. The basic rhythmic pulse of music
  4. 12. A brass instrument with valves
  5. 13. A woodwind instrument, the highest in its family
  6. 14. A musical term meaning "sweetly"
  7. 16. A musical form with a recurring theme
  8. 17. The speed of the music
  9. 18. A string instrument often played in orchestras
  10. 19. A symbol that raises a note by a half step
  11. 20. A woodwind instrument with a double reed
Down
  1. 1. A brass instrument similar to a trumpet
  2. 2. A percussion instrument with tuned bars
  3. 3. A musical term meaning "gradually getting slower"
  4. 5. A musical term meaning "held back"
  5. 7. A percussion instrument that can be tuned
  6. 8. A gradual increase in volume
  7. 9. A sharp, forceful attack
  8. 10. A brass instrument with a long slide
  9. 15. The lowest brass instrument