For something like the harp from Skyward Sword, you could try drawing lines on the bottom screen with each one corresponding to the notes on a regular scale.
Windwaker, just set the different time signatures to different buttons and have circle pad act as the c-stick so it's compatible with o3ds
Windwaker, just set the different time signatures to different buttons and have circle pad act as the c-stick so it's compatible with o3ds