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As far as R32's diagram, you will most probably need to install a capacitor between where the 5v connects to the - line and the output of the soundcard. If you have it without the capacitor, you will notice that when you turn your computer off it will automatically turn off.
The best way to test (wihtout soldering) is to buy a breadboard (radioshack) and just plug your wires and capacitors in.
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