Vortex Sound Research

Hi,

I;m trying tio work out how to set a modulation (for an operator volume for instance) so that it only starts half way through the cycle. IE it doesn't move until the knob is half way turned (so it starts raising the operator volume from 0-100 but only starting when the control hits the half way point). I use ableton and can turn it into a instrument rack to control multiple controls through one envelope but have no problems using seperate envelopes, although I would prefer to use just one. Sorry if my explanation isn't that good i will answer any questions to clarify