I wasn’t even able to create sets using my own content, and I still found myself using MadPad HD for hours at a time. Just interacting with others’ sets, remixing them and messing around with the app’s settings is enough to keep you entertained more than many iOS games will. If you have an iDevice with a camera, you’ll likely have even more fun with MadPad HD than I did.

Appletell’s made no secret of our big girly crush on Smule, makers of the Ocarina app, along with a slew of iPhone apps that combine interactivity with connecting people from around the world. So, it was with no small amount of excitement that I headed over to their Macworld Expo booth to speak with Ge Wang, CTO and Co-founder of Smule.

Smule, makers Ocarina app for iPhone aren’t content to have their app, which turns your iPhone into a musical instrument, be one of the most popular paid apps on the iTunes store. They want Ocarina-ists from all over to go head-to-head, pitting their mad musical skills against each other in that modern-day equivalent of the gladiator pit: YouTube. The big prize? Glory, for starts. And if that’s not enough, there’s also a grand total of $10,000 in prize money.

Well, my search is over, anyway. There have been may great apps released for the iPhone/iPod touch, but, Zelda geek that I am, this is the first I had to buy and download the very moment I learned about it. Smule has just announced Ocarina, the first and only app that transforms the iPhone into an expressive musical wind instrument. And to answer your question, yes. What kind of fools would the Smules be if they didn’t more or less teach you to play the theme from The Legend of Zelda: Ocarina of Time almost right away.

Details, video and some amazing audio after the break.