From looking at pictures of the rear of the Lexicon DC-2, you have available both audio RCA style analog inputs as well as digital spidif style digital inputs. The spidif inputs make use of the DC-2's DAC, the audio RCA inputs need to make use of a DAC external to the DC-2, such as the internal DAC of a network player such as a Bluesound Node, or of a separate outboard DAC. A Bluesound Node could be hooked up by either connection, but given that the DC-2 design is over 20 years old, it will more than likely be bested by more contemporary DACs, such as the internal DAC of a Bluesound Node.