Yes you can set these samples to respond to any MIDI CC including your mod wheel, data sliders, or you can use the graphic mod wheel in UVI Workstation. Simply set the CC value for that feature to the MIDI controller you're using right on the main interface. For example, you could set the Una Corda pedal CC to a value of 1 for mod wheel, then use your keyboard or UVI graphic mod wheel to activate the soft pedal. This is also a great way to use Mute Strikes in the Ravenscroft 275 library if you don't have extra pedals.