And if anyone's wondering - the revolutionary audio engine the author mentions was the Beatnik Audio Engine (BAE), open sourced as the Mini Beatnik Audio Engine (miniBAE) [1].
"Jim and I believed in the Jeffersonian ideal that a inventor has a lock on an idea for a limited period of time. There were many ideas in this code that could have been patented, however we chose not to pursue it. We chose the Trade Secret route. Because of that, this code did not end up in the hands of a Patent troll. Now it can be mixed back into the culture, to be recycled and reinvented."