Hi, I went through DMP-A8 DSP Manual and I didn't find the answer if Loudness option can be automatically switched based on volume levels. Similar to RME ADI-2 DAC.
I have it built into my active speakers (a so-called Fletcher-Munson curve), so I don’t use loudness. But it would be nice to have (and maybe it will come later - EQ / DSP is new with Eversolo). https://en.wikipedia.org/wiki/Equal-loudness_contour
I tested this in RME ADI-2 DAC and I like it but unfortunately it can't easily be integrated with streamer. I will do some test with Volumio next to see if it can meet my requirements.
I use it a lot with my adi 2 dac and it's one of a the reason I'm not sure to switch to the A8. It would be awesome to add it in a future update
It's nothing official, but there is a thread for that: http://forum.zidoo.tv/index.php?threads/dmp-a8-feature-requests.96919/