Flexible tone matrix

Here's a link to my version of a 16 step sine wave synthesizer before I go any further:

http://www.shackapoo.com/flex/SoundMatrix.html

I've been messing with the idea of a synethesic(sp?) rpg. Someone linked me to this tone matrix: lab.andre-michelle.com/tonematrix. I thought a good first step would be reproducing it. I also wanted to expand on musical parts of the matrix, using more than just the pentatonic scale in one key. So here is a much more flexible version of the tone matrix, where you can change the scale, key, and bpm. This is just a fast program I whipped up to figure out how the original was made, so I apologize in advanced if it looks a little rough.