I have the Lumin U1 and detect no difference in the sound between the Lumin and a Roon apps. You can tweak Roon to change equalization and DSP settings, but I leave Roon settings alone.
I am using Roon in DSD upsampling as I find it integrates well with my PS Audio Direct Stream Dac . I think probably because it gives thd Dac less work to do . I have to admit the sound now is to die for and I have never heard another PC based music system sound as good.
I use Roon and have tried the Lumin app on my U1Mini, and can’t tell any difference in sound quality. This, to me, is a win for Roon because in every other way it betters the Lumin app, without question.
I never use any upsampling, quality is always worse. Using T2 and for me Lumin app sounds so much better, that I cannot even use Roon due to the poor quality when compared.
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