[Darryl Ramm]

A quick Google shows that your UMC202HD supports ASIO. You should uninstall ASIO4ALL from the computer and run the latest installer for windows drivers for the UMC202HD that you download from the Beringer website. Then connect that interface, and select it in the Playback Engine dialog panel in Pro Tools. Make sure Windows audio/sounds and all other apps are *not* set to use the UMC202HD, just Pro Tools. Even if this does not fix the immediate problem, leave it as the audio interface and continue with other troubleshooting.

And since the QX1222USB comes with ASIO4ALL software it clearly does not support ASIO natively. This is cheap crap from Beringer who know ASIO is superior, but they do this with some of their low end products. But this mixer, like many low end digital mixers only provides stereo out/in to the DAW, you don't get to record the inputs or drive outputs directly like you do on standard DAW interfaces, or higher end digital live mixers. And the mixer does not act as a control surface for any DAWs via say HUI. Because of all that it's maybe not the best choice for working with a DAW. These small live mixers can be great for band practice and live events, including where you want to play stereo backing music from the computer, or capture a stereo main mix of the live performance.