[full disclosure: I work for Roon] I use a G68 to create MRC measurements, then I transcribe the values to a Roon parametric EQ for each channel (using a procedural EQ umbrella). A tedious procedure, but it works well and I can't hear any obvious audio "damage" (I listen to MQA material almost exclusively on my 8kSEs.)
I was under the impression that if you used any of the DSP functions of Roon then you couldn't implement MQA as the integrity of the file had been changed. Has this changed or have I been living with a misconception all this time and missing out?