Sound Morphing Demonstration

http://bit.do/dp7i7 Secret discount page at AbroSoft.
I've seen picture morphs before, but never heard a sound morph...so, I decided to write a morphing program for sounds in c++. Here is an example of a note from a guitar being morphed into a harmonica chord. The algorithm I came up with here works by taking an FFT of both sounds, ranks all harmonics in magnitude, then slowly moves each source harmonic toward an appropriate destination harmonic. The spectrum is folded each iteration and an inverse transform (IFFT) is applied yielding a new sound : ) This would be a neat component for a synthesizer. In fact, after searching the web I found a few rather expensive tools that perform somewhat similar tasks.