💡 Author's note: This unpublished post was originally written in May 2012, and refreshed for publication in November 2022. Just want to see the code? Check out github.com/jherrm/knobs When Apple introduced Garageband for the iPad back in March 2011, I just had to try it out. It wasn’t just the ability to create music that drew me in, it was the realization that this was a flagship app that uses the strengths of a multitouch interface to create experiences that weren’t possible with a keyboard a...