These are the materials from my presentation at the Guelph Jazz Festival Colloquium in Guelph, Ontario, Canada on 8 September 2011.
I made this max/msp patch to use in my classes to demonstrate the additive properties of sound waves (or digital signals in this case). A student asked for a copy to play with, so here it is in standalone app form for Mac OS X.
I made it for personal use, so the interface is not streamlined for usability by others. If you have questions, feel free to ask.