USB Headphone Hack!

Step 5 My Theory on Why It Works Well

The ADC is designed simply to convert the signal from analogue to digital before passing the data to the USB port. Signal Hum is eliminated because the PC component interference is largely blocked by the PC case. As for the signal quality, I believe that impedence mismatching is not nearly as large an issue with the ADC chip in the headset controller, as it merely takes the signal it recieves and converts it to digital data and into the PC, where digital to analog conversion then takes place, and amplification is applied by the drivers and software in the PC.