I currently use a NAD 1050 DAC, but got a vault 2i recently. I'd like to connect the vault 2i to the NAD to my amp just to test if that betters the sound quality than the onboard vault dac. I currently use USB with the NAD and my computer as the music source, but when I connected the usb to my vault through the NAD, the vault didn't register as a source. It seems that I can't connect a vault to an external dac via usb, and have to use toslink/optical, but if I do that I won't get the full resolution that the NAD supports via usb is 192. I can't use the analog outs to my dac because the NAD 1050 only has 1 set of analog out ports. I have a few questions:
1) Can I use usb to connect the vault 2i to the NAD, and if so how?
2) What is the best way to connect the vault 2i to the NAD 1050?
3) Will connecting to the 1050 be an improvement of sound quality over the vault 2i's onboard dac? They both sounded good yesterday, but I couldn't lock in the volumes on both to test equivalently. The salesperson seemed to indicate I wouldn't need the NAD any longer, but I just want to make sure.
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