My Vegas 14 works fine with this. I can use the slider on my MIDI controller to control things like channel volume and pan. However, in Vegas 19 setting it up in the exact same way it only will move the volume a couple tenths of a dB, and it is using relative values, not absolute like Vegas 14 (i.e. slider all the way down = volume all the way down, all the way up = volume all the way up)