Heard the audio on some of the captures posted on the site you linked. While AAC and a stereo downmix, it doesn't have that heavy metallic ringing present in the AGPtek, because it seems the HP has a much higher bitrate with its AAC encoding. I may stick to the Hauppauge because it seems easier to use, and I don't feel like spending any more money on internal upgrades for my Pavilion, when I'll likely be getting a Win 10 unit down the road (hopefully with much better specs, ala Intel I5 and 16GBs of ram).