The Tonematric is a simple sinewave synthesizer triggered by an ordinary 16step sequencer created by Andrea Michelle.
Each triggered step causes a force on the underlaying wave-map, which makes it more cute and melodic. It’s one of those things that you just need to play with to appreciate it!
Give it a whirl at http://lab.andre-michelle.com/tonematrix
And let me know if you come up with any masterpieces!
Even Yamaha are selling these as an actual synthesiser at http://tenori-on.yamaha-europe.com/uk/