First of all, there's a basic barrier to use. In order for a program to analyze the progression, you'll need to enter in the chords and melody. That's probably a lot more work than the analysis itself. Sort of like Danny Dunn and the Homework Machine.

Next, there's the problem that there's often more than one analysis possible, and often there may be parallel functions happening. Displaying all these options would be confusing - which are the right ones? Although a program can select a likely analysis, that doesn't mean it's right.

Finally, the analysis doesn't mean anything by itself. You have to understand what those underlying harmonic functions represent. And if you knew that, you'd probably not need the analysis software in the first place. Basically, what Eddie was alluding to.

-- David Cuny
My virtual singer development blog

Vocal control, you say. Never heard of it. Is that some kind of ProTools thing?