Line In Playthrough Off Osx

maybe i have missed a button somewhere in this wonderful software . . .
but it seems that when i am using the “line in” or if i am recording a line in signal into the sample editor .
you can always clearly hear the incoming signal .
is there a way to switch off this playthrough to be able to monitor the processed signal on its own .
if not .
then my idea would be that it should have one .
it would be very useful .

is this a problem just on the osx version of renoise ???

its surprising that this cannot be done .