Comment by squeaky-clean

Those gestures have been pretty standard with mouse movements in music software for a while. Apple brought it to touchscreen, but they didn't invent the multi gesture knob interface.

I had a Novation Zero SL mkii in 2008 which had a "universal knob". It acted as an HID mouse input and when you spun the knob it would click your mouse and drag it vertically. It worked with most music software at the time because vertically dragging a knob had become fairly standard.