--LOGARITHMIC SLIDER CONTROL-- These are best for bandpass filter frequency sliders. Also for volume controls using a 10% or a 20% taper. BioEra Slider with industry standard log taper, via ExpressionEvaluator for float & scalar as: (Math.pow(10,(In2*In1))-1)/(Math.pow(10,In2)-1)*100 (Math.pow(10,(In2*In1))-1)/(Math.pow(10,In2)-1)/10 and reverse aka anti-log aka LH-taper is simply accomplished by making the X factor negative. Rotary Control with log taper having input/output range 0-1, solved using base 10 logarithm, showing the exact X factors: Function: V=(10^(X*P)-1)/Y 0.2*(10^(X)-1) = 10^(X/2)-1 Lastly substitute Y=10^X-1 Taper:05% X=2.5575071 Taper:10% X=1.9084850 Taper:15% X=1.5066553 Taper:20% X=1.2041199 Y=15 Taper:25% X=0.9542425 Taper:30% X=0.7359535 Taper:35% X=0.5376906 Taper:40% X=0.3521825 Taper:45% X=0.1743003 Taper:50% Impossible Taper Rotary Control with log taper having input/output range 0-1, solved using natural logarithm, with an example X factor: Function: V=(e^(X*P)-1)/Y 0.2*(e^(X)-1) = e^(X/2)-1 Lastly substitute Y=e^X-1 Taper:20% X=2.7725887 Y=15 Taper:50% Impossible Taper http://www.wolframalpha.com/widgets/gallery/view.jsp?id=bc455327d0772719486c1a3ecf2e96d3