I’ll add to this - I believe it is a “Group Zone” behavior. Is this a bug or expected behaviour?
Here is the behaviour:
If I “group zones” in Roon (I have 4 DAC’s hooked up to the same PC running Roon) I don’t get the full decode light on my two MQA DAC’s even though I have told Roon in device setup (settings/Audio/Device/Device Setup) that two of my four DAC’s are full-MQA capable (decoder and renderer).
This happens on both my Pro-Ject Pre-Box S2 digital as well as my Mytek Brooklyn DAC+.
On the Pre-Box S2 the display will say “MQB” meaning (I think) that Roon did the first decode/unfold and the Pre-Box does the rendering.
On the Mytek Brooklyn the little dot shows a magenta (purple) color. As soon as I un-group the zones, the Brooklyn dot changes to blue. The Project Pre-Box S2 digital shows MQA.
Other info: 2 of my four DAC’s are NOT MQA capable: My Schiit Gungnir multibit and Monolith Monoprice THX788 headphone amp with integrated DAC are not USB capable; my Audioquest DragonFly Cobalt and Mytek Brooklyn DAC+ are MQA capable.
My theory is that because I am asking Roon to feed four DAC’s at the same time - and it KNOWS that the Gungnir and Monoprice cannot hardware unfold (decode)…Roon goes ahead and does the unfold/decode for all the grouped DACs then sends the signal out…and then the DragonFly Cobalt and Brooklyn DAC+ finish the final rendering and show that with the MQB and magenta dot, respectively.
If I ONLY group the MQA capable DAC’s together…they always show full decode.