I'm new to computer audio and need help with the following. I have a trial version of Audirvana Plus 3.0. I'm using a Benchmark DAC3 that can receive DSD in DoP1 format. The problem I have is that the Forced Upsampling to DSD option in Audirvana is greyed-out and Audirvana does not recognize the DAC's DSD capability. Otherwise, and in PCM format, Audirvana and the DAC play well together. What am I not doing correctly?