Turn off the notification sound at system level - Android Marshmallow I have an OPO 3 and I was wondering if there is a possibility to turn off the notification sound for all app, but I would like to retain ringtone sound as well as vibration.

Normally on Samsung S6, there's a possibility to do this when you press the Volume rocker key.

My device is rooted and have Xposed installed. I tried Ringer &amp; Notification Volume unlink xposed module but that doesn't seem to work.

This is something that I miss very badly, it's tragic that google didn't encompass this feature by default.
Automation is the preferred option. Many apps are available. I prefer using MacroDroid , since it is free (upto 5 macros) and easy to learn. To understand how MacroDroid works and required settings,  my answer here



Your macro would look like this


Macro : Kill Notification (name of macro )


Trigger:  Application Launched ( choose from the drop down the apps for which you want the macro to run)

Action: Notification Sound  ( select none, since you don't want any)

Constraints: None ( which means this macro always runs whenever chosen apps are launched)