Great topic, many valuable opinions, Thank you!
I have an N20. I also have the Holo May KTE DAC.
I can say without hesitation the Aurender Conductor App has been a very good experience. I owned a Lumen D2 and the Naim Streamer DAC solutions prior to my current setup. In both cases, the Conductor App has been more intuitive and reliable, IOS and Android are prevalent in my home, neither have been an issue.
Finding the right combination Aurender settings an interconnects has been the challenge. With all the variables (DSD to PCM, AES, USB, LOW Pass Filter, Upsampling level options, etc..) It is literally picking a lock! I have purchased many different interconnects, all very good. I,ve found many times sound quality depends on the recording, not the Conductor settings or interconnects.
I have spoken to both Tim at Holo and Ari at Aurender, great guys, experts in their respective verticals, but hesitant to recommend a comprehensive setting or interconnect configuration.
I am not technical, the science is too broad. There is so much content and expertise on this thread. If anyone cares to potentially narrow down a couple best in class settings to recommend, I would really appreciate it, I.E. Low Pass Filter Setting, DSD to PCM or not, upsample or not, interconnect, etc...
Much Appreciated