Default Format where you select sound quality frequency is grayed out. On any Wave Out devices output format 16/48. But on a Master Mixer device output format 32/48. First, why the choice is blocked? With what real bit depth is the audio stream transmitted to the sound card? If I listen to music, choose Stereo Mix, is there 32/48, will the sound stream to the card be 32 bits? If I choose Wave Out 2/3 then 16/48? Or is the stream always converted to 24 bits?