I want to be able to control Notification, Ringtone or both volumes if I link them (it would be nice to choose which one to control) if I press volume buttons, if no media is playing. I repeat: if no media is playing.
Of course I would want to control media volume if media is playing, it's stupid and illogical to control other volume when Media is playing, like it's stupid to control media volume when no media is playing, like it's happening by default on my phone.
I tried using an app, named Button Mapper: Remap your keys, assigning Volume + and Volulme - to volume buttons, but the system decides to control System volume (the one that sets volume for different system actions, like screenlock sound, camera shuter etc.). On another phone, a Xiaomi with MIUI 8, this app works correctly: if I assign Volume + and Volume - to volume buttons, system changes Notification volume (by default, MIUI control Media volume too, even if no media is playing).
What I've noticed is that this app could assign a Tasker Intent, as you can see in the screenshot I added, if this could be helpful.
I am a complete noob in Tasker, I really don't know what this and that does but I guess I can implement commands and tasks if someone would write them down.