Polyphonic!
Make your own music by lighting up colored squares with Polyphonic.
Polyphonic’s interface is dead simple, allowing even non-musicians to create fantastic musical loops. Just tap a colored square to light it up and then hit play. You’ll see the progress bar at the bottom of the screen start to move, and when it hits the end it will start over again. Each square is a sound of its own, and each different color is a group of sounds, so just tap more squares to add complexity to your loop. The app includes two sound sets to choose from, and a loop grid of 36 squares.