Arduino projects and demos that use the PC speaker.
/eyes/ - Plays "Eyes on Me" from Final Fantasy VIII. Uses 8 LEDs to show which notes are played.
/gongjinou/ - Plays "Gong Jin Ou," the Qing national anthem. Uses 5 LEDs as a pitch analyzer.
/rain/ - Plays "Rain" from Xian Jian. Uses a serial shifter and digital LED to display note names as they are played. The decimal point indicates sharps.