Found this in an older post:
In fact, Volumio CAN handle MQA, but only under some circumstances:
- You need to have an USB DAC which is MQA compatible. For example, with my Pro-Ject Pre Box S2 Digital I can play any MQA file
- With a compatible USB DAC, volume must be set at 100
In any other condition, MQA will not work on Volumio. This is mainly because we can’t incorporate the MQA software decoder into Volumio as we will violate MPD’s GPL license.
This confirms Volumio will not decode MQA, so you technically do need a DAC which is a MQA decoder… So working with DAC which is only a MQA renderer will not work.
Also apparent, that my setups do work with RoPieee because RoPieee is not a player, only a bridge and the unfolding is done in either Roon or Audirvana. So guys having DACs being only a renderer can use RPi running Volumio only as Roon Bridge or UpNP renderer and need an “external” player which does unfolding.