Although I cannot speak on the Lumin App I can tell you that Roon is certainly the cleanest most transparent music player I have used. It blows away all the incarnations of J River for sure.
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.
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