Well, I though of adding a good DAC to the thing, so it could play MP3s while flying (sort of whistling while you work), but didn't have the board space

Actually, one thing I have been thinking about is making an addon for the board that would drive a couple of three-phase brushless motors. The drive method allows you to run the coils at audio frequencies, thereby making beeps and whatnot come from the motor itself. I wondered if you could mix in audio data to the drive signals, and superimpose music on the motor output! Since my latest plane design is a twin-motor design, you could even have stereo

Maybe I should patent the idea.

pca