@wjt3, My Aurender N20 is connected to my Bricasti M21 DAC using both the USB connection and the AES/EBU connection. After many listening, tests, I used the AES/EBU connection all the time (99%). The Bricasti M21 DAC has several options but I use the ladder DAC setting all of the time because it sounds the best.
My cables are the Audience Au24 SE+ USB Cable, one meter, Single connections at each end but two wires and the Kubala-Sosna Emotion AES/EBU cable, Balanced XLR (1 cable), 1.5 meters length.
I use the Kubala-Sosna Expression Interconnect Cable (2 cables), XLR connections, 1.5 meter length to connect to my SimAudio 700i V2 integrated amplifier.
My cables are the Audience Au24 SE+ USB Cable, one meter, Single connections at each end but two wires and the Kubala-Sosna Emotion AES/EBU cable, Balanced XLR (1 cable), 1.5 meters length.
I use the Kubala-Sosna Expression Interconnect Cable (2 cables), XLR connections, 1.5 meter length to connect to my SimAudio 700i V2 integrated amplifier.