How hard would be it be for someone to make this iPhone app?

I’ve ALWAYS wondered why Apple never included an customizable EQ with it’s portable music players. Ranging from the iPod to the iPhone. It seems so simple to me.

Now the iPhone and the SDK are available, this seems possible. Now, I am only a designer, not a programmer so I don’t know exactly. But I’m certainly intrigued by the plausibility of it.

The main reason I’m asking is that I have a great pair of headphones (V-Moda Vibe Duo), which could sound so great if I had more control over the equalization.