Guitar hero as -standalone- MIDI device! Works on iPhone!
The world has seen some versions of the guitar hero controller used for live music. Most versions included a MAX/MSP patch or other software running on a computer. In this retro-interface I’m looking at a different option, connecting the guitar as standalone USB MIDI device, so it can be connected to iphone directly!
Check out sources at http://wiki.edwindertien.nl/doku.php?id=projects:guitarhero
Two components are used: a standard Arduino Leonardo board and a standard USB host shield. The not-guite-USB plug that comes with the controller is replaced by a (color-wire) compatible standard USB-A plug. The software in the Leonardo does the rest. Libraries arcore and USB-host shield have been used straight from the repositories and everything was compiled using a fresh arduino 1.6.4 install (tested on linux and OSX)