I am trying to find a way to convert frequency into a linear scale going from -5 to +5 in float. The goal is to generate a frequency in hertz and onvert it to a float to get a control voltage. I tried entering the frequency value to pow, scale or exp with no success. Is there an object for that ? Or a mathemagic expression ? I never did any log/exp math, so I have no idea how to do it.