My neighbour is moving, and gave me a guitar. Unfortunately, it's not in tune, and I don't know how to tune it off the top of my head. (I know how to tune it, I just don't have any sort of reference to get it right.) Then I got to thinking...

The empeg has a mic input. Theoretically, then, we could write an app that uses the mic, and acts as a tuner. Since this is totally outside the scope of my understanding, I'm curious to know what a project like this might entail?