7.With DSD files playing, why doesn't the DSD indicator on Q1MKII light up?
A: Some music players doesn't support DSD playback via DoP. Though they're playing DSD files, those files are already converted. Therefore, Q1MKII couldn't tell there're DSD files playing.
Note: If you connect the Q1MKII with the computer, here is the instruction to guide how to play DSD file by foobar2000: click here. As we know, the music player JRiver also can support DoP.