Goodday, it seems that the only audio processing app that works till now on the roco k706, is the zen dts app from riuruky. When I installed that magisk module, it showed a message about fixing permissions. Now I think that that is the key to make your app also work(turn on) on the roco k706 car radio. I installed your magisk module, but although I set legacy mode on and turn the app on, it does show 'enabled no'. Could you fix this so we can have wonderfull sound again on our radio?
thx