Comment by baxuz

Yeah but that doesn't have much value as you lose the value indicator.

If you don't need a value indicator, you don't need a circular knob as an affordance. You can have a whatever as it just reacts to your input.

If you do have a value indicator which is "infinite", such as a numerical value display, it's better to make it interactive and place the interaction on top of it, instead of splitting the UI between a value indicator and the input.

A lot of software does this.