Problem: The hand pan audio didn't always initialize properly, causing silent notes on first interaction.
Solution: Added robust audio context state checking and automatic initialization.
1. Try clicking on tone fields - you should see an audio status indicator if audio isn't ready
2. Click the audio status indicator or any tone field to initialize audio
3. Once audio is initialized, the indicator should disappear and notes should play
4. Use the "Test Audio Context" button to check the current audio state