apart from the ranges i want when for example im in low setting and i go to middle for the pitch to stay the same as before but only the "sensitivity" of the know to change, maybe make this with a sample and hold ;

Normalize your knob range to be 0-1 (or -1 to 1).

Then you can express any range you want, in terms of a range and an offset: value = range * knob + offset.

The radio button would change the range and offset.

"Sample and hold," I'm not sure now exactly what behavior you want. An easy behavior would be: use the radio button to change only the cold inlets of the * and + operators. Then, changing the radio button would not update the output value. The knob would be connected to the * operator's hot inlet, so that touching the knob would produce output.

hjh