The Volume control bar is not user friendly.
The volume control bar are hard to control. When the volume is 0.0dB, it seem to be hard to call it. Touch it will show blue 0.0dB. So I am sure the iPad recognize you input. But I slide the bar, it just don’t recognize any input. Always need to try 3 to 4 time as the apps take my input. Also, even time need to catch the dot is also need user friendly. I think just slide the bar left and right to represent vol up and down is a better way as the iPad main volume also the same. May be a enable/disable volume or volume lock bottom beside is even better.