It's a miracle, a proper filter on a device with non-selectable filters? Can someone give these guys an award for paying attention? Usually we're greeted with dumb slow filters and such. Also really cool to see repurposed SPDIF I/O, really wish DAC makers would start differentiating themselves like this with better and more I/O offerings like this. Very few do this, and I would assume the costs aren't THAT astronomical to add multiples or digital output I/O (pretty helpful for people with lots of devices).
This thing is great.