Is this possible to use while running Pulseaudio? I've noticed that alsamixer has a toggle 'Stereo Upmixing' with options like 'Front+Surround'. I'm not sure how this will work, I have the 4.1 profile selected in pulse with remixing/LFE enabled so this probably conflicts. I'm guessing pulse would have to pass stereo output to the Alsa driver for this to work which I'm also guessing is not possible if pulse has remixing enabled.
