1. What makes the Theremin unique compared to almost all other musical instruments?

2. What material was the world's oldest known musical instrument made from?

3. What physical phenomenon does a Leslie speaker use to create its shimmering sound?

4. Which earlier instrument did the clarinet evolve from?

5. What playing technique is used to produce sound on a harpejji?

6. Why was the glass armonica rumored to be dangerous to players in the 18th century?

7. What are the movable bridges on a koto called?

8. How many strings does a standard balalaika have?

9. What type of scientific resonator is formed by the hole on the bottom of a Hang?

10. How was the cello primarily held before the invention of the endpin?

11. What is the name of the large plectrum used to play the shamisen?

12. What is the function of the 'dog' (chien) on a hurdy-gurdy?

13. What type of resonator is a didgeridoo scientifically classified as?

14. What did John Cage place inside a piano to create a 'prepared piano'?

15. What does pulling a 'stop' on a pipe organ do?

16. What is the primary material difference between a glockenspiel and a xylophone?

17. What acts as the primary resonator for a jaw harp?

18. What was Leon Theremin originally researching when he discovered the instrument?

19. In which famous ballet did the celesta make its orchestral debut?

20. What is the function of the 'escapement' in a piano action?