The French mega-producers in Air are joining forces with London music technology company RjDj to make a nifty little app for your iPhone, and hopefully promote their latest album, Love 2, in the process. The music-making program, called “Love by AIR,” gives fans (who are also AT&T customers) the experience of mixing ambient soundscapes and their own voice into Air’s music all in real-time. In launching the iPhone app, RjDj and Air are holding a contest, which takes the age-old idea of making a mixtape for someone you love and joins it with the ease and customizing abilities of their new technology. Check out more details on “Love by AIR” and the contest here.