I have qudelix 5k dac which has its own built in audio management and eq profile setup for a given wired headphone. It works with Bluetooth and USB-C, but the latter is clunky on the move.
I also have a plain, small USB-C dac (Apple Audio Adapter), and it works seamlessly for when I want to connect wired headphones to a Pixel 9. But for high end headphones, having good equalizer settings makes a big difference, and I am wondering if anyone with experience knows the simplest way to achieve this system-wide, regardless of audio player.
So far I have heard about wavelet and Winamp equalizer as options.
Fwiw, USB Audio Player Pro is not an option due to licence check with play services (unavailable as a standalone purchase).
Thanks