I have checked the option "HDMI Audio Output: Output only two audio channels" in the Matrox MXO2 mini config panel (from MC "Tools/Video Output tool/Audio output") and yet I still get 8 output channels displayed in the Audio Tool; audio project is stereo.
Is there a way to reduce the number of output channels displayed in the Audio Tool when using the Matrox MXO2 mini ? Or is it "baked in" the Matrox driver (and MC just reads that info) ?