DOWNLOAD AND RUN IN TURBO MODE. (Works better on a new computer... Probably! Its really slow on mine!) IDEA FROM HERE: http://lab.andre-michelle.com/tonematrix Click the blocks to make them white/grey. Press the space bar to clear. If the block is white, then it will play a sound. If the block is grey, then it will do nothing. The Y position of the blocks is the pitch. The X position of the blocks is the time.