gimmeheadroom
Headphoneus Supremus
The claim is that even without an MQA DAC you get some improvement in noise reduction due to the MQA filters. I didn't really understand what you're asking because if you include Hifi there are 3 choices here, not two.I’m sure this has been asked before so I apologise in advance.
Is there a benefit to playing the MQA masters using a non MQA dac vs Sticking to HiFi? Or is the decoding process going to potentially cause problems in SQ?
1. MQA with MQA DAC: if the MQA supports full unfolding (many low-end ones do not) then you get the best possible outcome
2. MQA with desktop or phone app doing first unfold and playing over a non-MQA DAC: The sound is quite good. I compared the software unfold with one of my MQA DACs and I think the desktop app does a really good job. It can vary depending on how many unfolds there are but my feeling is you are still getting your money's worth without an MQA DAC. If you want to go the last mile, buy good (not cheap) hardware.
3. Hifi. This is a weird one. In many cases, hifi setting while playing a Master will cause the desktop app not to do the unfold but will send an MQA bitstream to your DAC.
TL;DR yes there is a benefit to playing MQA from the app, no the sound quality does not get worse.