I'm planning to make a atari punk console for an electronics project, but i have a question, the original circuit published here: http://compiler.kaustic.net/machines/apc.html has a "line outout". Is this a suitable way to drive headphones as well? Should i remove this resistor array and replace it with a log pot in series with the 556's output? Or how should I modify the circuit to drive headphones and have some kind of volume control?
Also, is line output that important?