[Mikael Johnsson]

I might have sorted it out myself using valueAtTime and some if statements.

masterValue = comp("MAIN_CONTROLS").layer("TypeOut_MASTER").text.animator("Animator 1").selector("Range Selector 1").start;

if (time - inPoint < 1) {
masterValue.valueAtTime(time-inPoint);
} else

if (time-outPoint > -1) {
    masterValue.valueAtTime(time-outPoint+2);}
else
masterValue.valueAtTime(1);