each drum. Each drum coming with their specific set of controllers.
It is definitely something that is made for live tweaking or direct recording.
Now it comes with the possibility to save presets which can be a good thing if you have tweaked the drums to perfection or for different starting points.
In my opinion it is one of the better apps for music making on Android specially for live tweaking and it is for free and without publicity.
Play Store link:
DMach