Look at this! A sneaky new feature of the BPE that I don't remember being documented in the Engine Driver articles: a Sound Curve Editor.
It's good to have a visualisation of the curves instead of always having to visualize it in my head. It's also interesting to see that the curve does not appear to be an actual curve of best fit through the defined points, but a straight line from vertex to vertex. You can click anywhere on the graph to add a new vertex, you can click on an existing vertex and drag it around to adjust it's position, and you can click on a vertex and press the Del key to delete it. You can also input the X,Y coords below to be more precise.
Pretty nifty little extra, I'd say!
Chris