Oh, then you probably shouldn't listen to me. I haven't used PowerAmp since the days of 4.1. DVC stands for Direct Volume Control. I know PowerAmp has some issues that are resolved by turning it off. (it's a checkbox somewhere in the system menu).
Either way, I think unless you really like PowerAmp, Viper4Android with any other music player of your choice will be (in my opinion, of course, since what works for me might not work for you) a much nicer audio experience than PowerAmp and its EQ.
If you do choose to install Viper, remember, don't install the APK normally. Put the APK in /system/priv-app (NOT /system/app). That will ensure it will seamlessly work regardless of what the source of the audio is (PowerAmp, Google Music, Netflix, Youtube, etc).[/QUOTE
thank you so much!
I do some tests here and following what you say (put apk in system/priv-app, reboot, open app and set)
I see:
with Google Play Music:
Viper make sounds better, sooo much better! but, don't increase volume.
so, I uninstall faux sound (clear data of app too), reboot, set some things in Viper and then install faux sound again.
and now sound is loud (very!) and higher quality.
with Power Amp:
doesn't see difference.
I like (and pay for..) Power Amp because is a good and easy app to work with. but, if you can show me a better app that I play with...
and
@Savant
thanks for help. I tested Eizo, but don't see difference in sound like I see with Viper.
if dev and guys prefer, we can talk about with PM.
thanks all!