Damned fine looking setup ya' got there.hello all... here my setup..
Raspberry pi + Digital Coax Out (Volumio) - Parasound d/ac-2000 (ultra analog) - Woo Audio WA6 - Senn HD700...
so far so good...
As for me, I use Neutron Music Player on Windows and Android alike. It has oe of the best DSP sections out there. The problem for many is its outdated interface. And on Windows it is worse because the dev just used the android interface on the Windows version. So, not only does it look outdated (for some), it also looks stretched like it doesn't belong on Windows.Peace APO equalizer, it's very good.
https://www.reddit.com/r/headphones/comments/10aatg0/how_to_install_equalizer_apo_w_peace_gui/
For me, I like the interface on android (not so much on Windows though), but otherwise don't care much because I am more interested in all the things it can/does do for sound reproduction.
As for EQ with Neutron, you can store your "home made" profiles (as many as you want in fact) and can copy them between devices or different installations of the app. I also love that you can use up 64 bands in the EQ.
Another favorite thing is that you can mix and match your bands. Some can be EQ, and others can be PEQ, however you see fit to sculpt your sound. Plus it also interfaces and applies Auto-EQ profiles from the net.
Just my $.02.