I got a USB VOIP phone to use on my PC for Skype. And when I tried it out the sound quality was awful. In my tests the recording coming from the microphone was almost robotic sounding.
It was way too bad to put up with, so I ordered a USB headset. In hindset, a headset is really more practical anyway for my needs. So I got the headset, plugged it in, and Windows 7 immediately installed the appropriate drivers. I set it up on Skype and... same problem. It sounded awful.
So I knew something weird was going on. Then I had the bright idea of plugging the USB cable into the back of my computer (directly into the USB coming off the motherboard). Voila, that solved it. You see, I had been plugging in both devices into my internal multi-purpose card reader on the front of my computer. The card reader is powered by USB 2.0, and acts as a sort of hub. In the end I suppose the throughput was so low that it was massively compromising sound quality.
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