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Across
  1. 4. Featured in psychedelic rock
  2. 7. Adds depth to rock arrangements
  3. 8. Featured in rockabilly
  4. 10. Provides the lowend groove
  5. 14. Handheld percussion in rock
  6. 15. Heard in early rock hits
  7. 16. Rarely used, but unique in early rock
  8. 18. Essential for rock rhythm
  9. 20. Bob Dylan's signature instrument
Down
  1. 1. Early use in experimental rock
  2. 2. Backbone of rock 'n' roll sound
  3. 3. Sometimes heard in 50s rock
  4. 5. Adds rhythm in some rock songs
  5. 6. Occasionally heard in folk rock
  6. 9. Jerry Lee Lewis' pounding instrument
  7. 11. Pedal steel in country rock
  8. 12. Used by The Beatles for a unique sound
  9. 13. Latin percussion in rock
  10. 17. Prominent in The Doors' sound
  11. 19. Adds a shake to rock beats