I encountered a problem with my DS212, once it is connected to the DAC using a USB cable. Even the DAC is turned off, there is noise coming out from the DS212...
My connection is like this:
DS212 --> DAC (Audiolab 8200CD) --> Amp (Luxman 505U)
The strange thing is, even when the DAC is off, the amp is giving out noise. (The 2 meters in front shows there are input signals).
The noise is like "Dee... Dee Dee De...."