How does a xylophone change pitch?

Related questions

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4. Is a glockenspiel the same as a xylophone?
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6. How does the xylophone produce sound?
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Tags

1. #organization
2. #higher
3. #producing
4. #determined
5. #xylophone
6. #composite
7. #material
8. #sound
9. #plastic
10. #rubber
11. #struck
12. #longer
13. #length
14. #notes
15. #lower
16. #shorter
17. #wooden
18. #produces
19. #pitch
20. #mallet