I've been using poweramp with dump permission for a long time but I used it with brave, because of no ads ofc... Then after I got used to poweramp I felt I wanted room for the sound, I wanted some reverb... Then I searched for an app using which i can achieve reverb then I found RootlessJamesDSP... 

But there was a problem... I couldn't stack both of the apps... Probably because of a single sound pipeline... And i was using brave... Which is not a music app to begin with... Then i downloaded metrolist which also didn't have ads... Then i thought wait a second... JamesDSP might also expose a channel that poweramp can latch onto ... The I'd be damned it worked... JamesDSP and poweramp were working together... Im so happy rn... 

But, there's something "My guess is that JamesDSP creates an audio session that Poweramp can attach to, but that's just a hypothesis." It's working for me... But might not for you...

So, 

\-Metrolist for the songs... 

\-JamesDSP for convolver reverb etc... (I haven't learned james completely yet)... U will need adb here too...

\-Poweramp, turn on poweramp eq for RootlessJamesDSP... 

If anyone knows the Android audio mechanism behind this, I'd love to hear the explanation... 

Got poweramp and RootlessJamesDSP working together...