My Midi Controller allows me to add 2 Sustain pedals. Of Course one I use for Sustain, but I don't know what is best to use the other for. I tried the Sostenuto and Soft Pedal function(Midi cc 66/67) But they don't seem to do much. Is there a better midi function for this extra sustain pedal? Please know my keyboard knowledge is small and I use it mainly for softsynths.