It is a great idea for a future project, although it will involve some SMD parts (not easy to solder). Pedal-pi is a hard-core project that is easy to build and all the codes are done in simple C.
Including a big display and pure data (with an audio codec) is a fantastic idea but not possible to do with the current circuit.
Yes, definitely have to make a new circuit, it does not matter if i can not solder it manually, it is a prefabricated product that can be connected to a raspberry by gpio
traducido desde el espaƱol al ingles asi numah! ALV