i use optical from my tivo to the mani, coax from my oppo blu-ray to it, also. the usb stumped me - oppo has a type of usb output, but there’s no cable to make the connection, so guessing they’re not intended to be used like that. don’t have a pc to connect into it. always struck me as odd that amps with built in dac modules only use usb or only have that option. i could have used a phone option more on asgard 3, by the way, as with others in the subsection of the range. essentially i’m watching tv and movies with headphones ... on a tv, with physical discs. have a turntable i would have hooked up, but the separate phono stage is expensive compared to the phono card. with all the knowledge applied to getting the sound and cost right on schiit, the options on the models absolutely baffles me every time i look at making sense of it. can’t decipher what the thinking was or the application might be for most of it, and the things i have bought were hard to opt for and feel like they’re solutions without them necessarily being intended to be, without them solely being for what i use them for.