Melco firmware 3.92 official release now available

[simoncn]

In your setup, with no stream.transcode setting it is the Melco USB-DAC renderer that would decode AAC into PCM before passing it to the TT2. This means you will get less benefit from MinimStreamer doing WAV transcoding than if the Melco were streaming across the network but I think it is still worth trying this for a comparison.

The MPEG-DASH stream contains AAC data (somewhat deeply buried) and MinimStreamer extracts this and sends it to the renderer as a "normal" AAC/ADTS stream.

Dark mode improves sound quality because it disables an internal process within the Melco. I believe there have been other tweaks but I don't know the details of what was changed.