[PROBLEM] Sound Quality Moodeaudio 6.0.0

[Miss Sissy Princess]

Step one:  Find out what it relates to.  Go back to a completely stock installation of moOde 6.x.  

Leave the EQ off.
Don't do any of the "it sounds better and I have no measurements to support that claim" tweaks or setting changes.
Put a revealing, well-recorded track on a local USB stick.  Use an uncompressed format like FLAC or ALAC.  
Play it.  Does it have audible problems?

If there are audible problems:

1.  Swap headphones, speakers, etc. to see if the problem tracks the transducers.
2.  Try another DAC.  Doesn't have to be a great one -- whatever USB DAC you have lying around (Audioquest Dragonfly, Objective DAC, Eiio, Topping, M-Audio, etc.).  See if that improves things.

If it sounds good, then start changing things.  

Turn on the EQ.  Does that degrade the sound? (I'm with grasshopper -- I never use EQ and have no tone controls in my audio system).
Point moOde to wherever you normally keep your music (NAS, external hard drive, network share, etc.).  Play the same track from there.  

etc., etc., etc.

I am sorry but I have the impression that you are writing nonsense. I don't have any USB DAC etc. etc.

I'm sharing expertise and debugging skills that you clearly lack. There is nothing 'nonsensical' about the steps I provided to isolate the problem that you think you hear.  

I've learned over the years that if someone just complains about a problem that no one else is reporting, and they are unwilling to do anything suggested to narrow down what is causing the alleged problem, they are unlikely to get much help.