Comment 1 for bug 1656225

I do not like the idea to have an extra parameter type apart from buttons and knobs.
Since such a parameter is controlled by a knob, it should be one of the knob nature.

The prepared solution for it is CONTROL_KNOB_STEPPING:
https://github.com/mixxxdj/mixxx/blob/7e81c3014e0d92c57d685db9dd0d1d9394f783cc/src/effects/effectmanifestparameter.h#L14

This ControlHint, allows to make labeled scale on the knob or a value display as requested here.

We have only not managed to make a widget for it.