So I have this device running on Windows 10, with all drivers and firmware are up to date as of this posting. I use both speakers and phones to listen to audio, and I am only using the USB connection from my PC as an audio source. There are 3 playback devices shown in the Windows sound control panel: "Speakers (Mixing Driver 1 for Us 2x2)", "Speakers (Mixing Driver 2 for US-2x2)", and "Speakers (US-2x2)" Here's the problem: I can get sound if I select "Speakers US 2x2" as the default playback device, but If I select either Mixing drivers 1 or 2, I get nothing. The volume meter in control panel does show activity through these devices. This applies whether I'm using headphones or the line out. I'd really like to get this "mixing driver" device to work so that I can have control over the volume through the PC, rather than having to manually turn knobs to control it. Strange thing is this used to work just fine for the past month since I've owned it, but something triggered this problem and I have no clue what it is. I double checked all the applicable monitor balance and volume knobs. I also uninstalled/reinstalled the device and all drivers multiple times. Anyone able to provide some insight? Thank you for reading. Edit: Also worth noting.. it worked flawlessly before with Ableton Live 9, but now I get a lovely "audio device engine is off. please choose an audio device" message. Then when I attempt to choose the US-2x2 I get a "failed to open" message.