Difference between Fiddler and Twiddler

Fiddler

Part of speech: noun

Definition: One who plays the fiddle.

Example sentence: I've spent hours and hours doing research into Appalachian folk music. My grandfather was a fiddler. There is something very immediate, very simple and emotional, about that music.

Twiddler

Part of speech: noun

Definition: Agent noun of twiddle; one who twiddles.