[Guilherme] picked up a SparkFun Button Pad and was taking a closer look at the device when he noticed that it was based off the ATMega328 microcontroller. Since he loves working with MIDI, he thought that the Button Pad would make a slick yet compact standalone MIDI controller.
Since his ultimate goal was to create a completely standalone controller aside from the power plug and MIDI interface, it forced him to work quite closely with the ATMega chip. He and his partners spent a good deal of time working through some serial communications issues so as not to block the LEDs or MIDI block timer during operation. Ensuring that the Arduino doesn’t block any other functions is obviously important when you are building a MIDI timer, and it seems [Guilherme] was successful in his quest.
The MIDI controller works quite nicely as you can see in the videos below, great job!