Somewhere between the Sound Blaster and using RF leakage in the AM band to generate sound was the Covox Speech Thing, which used the pins from your parallel por

Somewhere between the Sound Blaster and using RF leakage in the AM band to generate sound was the Covox Speech Thing, which used the pins from your parallel port and a resistor ladder to generate PCM sound. You could solder one together yourself. Some games supported it, and Disney marketed an improved version with a built-in speaker and powered amplifier as the Disney Sound Source.