Hector Martin

Plenty of cheap cards have gone to doing this, assuming later stages can either handle the ultrasonics, or they'll filter them out. "Can't hear it anyway, lol" Though that's usually high-oversampling sigma-delta cards that have the hash moved way out into RF.

Oh ick, I was just talking about not filtering, not constantly putting out a squarewave. Maybe it considers it some kind of ultracheap dither.

electrolytics are more expensive, take space, and wear out. Other caps are guilty of the first two. The current mantra is 'use a .00000001cent transistor on a die, not a 1 cent component on the board'