Replying to @HalleAndert@social.vivaldi.net
@HalleAndert@social.vivaldi.net oh I see now, my bad 🙂
for a cross platform solution I use #musicassistant
still not answering directly to your original poll
but you can use DSP parametric filters for equalisation, verify a lot of parameters of music files and have full control of both local and streaming sources and players
https://www.music-assistant.io/#preview