I don't really know what digital would mean in these circumstances. Isn't all sound digital coming from a motherboard, soundcard or simular? Analog sound (I'm a musician) for me is tube amplifiers, old mixing desks etc
When he says digital, he means that it's output in digital format. I fit's output via those headphone jack sized ports, that's analog output. if it's optical, coax, and usb it'd be digital.