I own a nice turntable but I really do no tuse it anymore, so I have just replaced by old Quad 33 pre amp with phone input with a modern DAC with volume control and only digital inputs. That is fine with me, but my wife wants to keep the vinyl option. I have found the Pro-ject Phono Box E phono pre amp with optical output. However I also notice that they have a similar Phono Box USB. Just like with turntables with usb output the specificatiosnh only refers to connection to a computer (for ripping). Are there two kinds of usb output, and will this not work into the usb input of a DAC?