This is 3D Knob GUI element originally used for rotating the waveform on my turntable its a slimmed down version of that rotating a 3D potentiometer. The output to the screen is scaled down from 0 to 360 normalized down to 0 to 1 range. Feel free to use it as a GUI to rotate a 3D object or use it anywhere you would use a slider.

This is a Make Grid Lines object rendered onto a sphere with some noise added from Image Frost. There is two compositions one with Audio Input and one without.

This emulates the Quartz Composer fog effect, where 3D objects fade to a set color the further away they are from the camera. Thanks to @GeorgeToledo for introducing the solution to use the depth image from Render Scene to Image.