ToneMatrix (http://tonematrix.audiotool.com/_/18g5.b3i.1049.a5k.1124.18i9.a0a.13a4.80p.16a4.80o. 19a5.160k.1908.6al.1904)

Just click any block and when it lights up, the next loop will update with new notes.
Click the white boxes to remove them and change the sound.

Reload page for fresh start (all black).

Record from your soundcard and upload to SoundCloud and do better than Dubstep.

It's like the laser pointer for humans.

I wonder what would happen if we showed this to Vihart? :D