Loops Volume Control in Android from U-Mix

Hello,
I just received my U-Mix deck and I am using it with the Android app.
Can someone tell me please how to control the drum loops volume from the U-Mix deck in Android without having to touch my Android tablet?
Thanks very much for any directions!
I just received my U-Mix deck and I am using it with the Android app.
Can someone tell me please how to control the drum loops volume from the U-Mix deck in Android without having to touch my Android tablet?
Thanks very much for any directions!