Check out The Octavizer for the launchpad. Using the row of circular buttons across the top, The Octavizer lets you change the octaves of the rows of square buttons. All the chromatic note mapping stays the same it just changes octaves so it is compatible with Chords2.0. Enjoy
Max/MSP/PD Chiptune externals
Here is a really cool repository of some chiptune patches. I was happy to find these because I have always enjoyed chip tune sounds. I have made a touch screen/MIDI interface for the atari2600 external and I will probably make some more. I just wanted to make a multi touch MIDI interface, but after playing with the externals from this link I just had to integrate one into my design. You can download Phew for windows right now. If you guys like it I will make something eles with the NES patcher.
Download Phew1.0 for windows