Agree the midi controller foot pedal is going to hard to manage for pitch shifts. One of those large multi-button ones would probably work better than a wah type pedal. Flexinoodle, it's just one of those things that I think you have to put some thought into from a turntablist's perspective. The best way for me to explain it is to break the pitch changing down to a very basic level. You've got the "beep, ahhhhhhh" sample. A turntablist is going to want to flip that as many ways as possible. The "beep", being more musical, is going to have lots of noticeable variation when the pitch is changed and is going to sound best in a musical scale. Loading up some kind of DVS setup where you load different "beep" samples at different pitches is doable but not really as practical as being able to take that "beep" and be able to flip it into different notes using a turntable. Using a 16 levels MPC type of sampler to flip the pitch will work, but you can't scratch the sample then. A scratch DJ is goinig to want to be able to not only flip the pitches but also maintain control over the sample for scratching and bending and all the other stuff turntablists do. A pitch shifting turntable is just easiest way to get from point A to point B. Now, you can use your imagination to expand beyond what you can do with "beep". You can apply the above logic to any sample on wax or your DVS. You can have your scratch samples tuned to the underlying track. There are many more possibilities when making musical tracks that are composed directly off the turntable. We can argue all day over whether "scratch music" sounds good or is not the best way to make music but that's really just opinion. I could just as easily argue that sample music in general is stupid because the sounds can be played by "real musicians". The bottom line is that scratch DJs have legitimate and valid reasons for wanting pitch shifting turntables. It's not a pointless exercise.