Is a fantastic iPhone application, available on the App Store. It is an interesting software based on listening to recordings olofoniche or recorded with two microphones, allowing you to make considerable auditory experiences.
The application necessarily require the use of headphones, but I can assure you that the effect is breathtaking. Currently available are 10 audio effects, although developers have announced the release of new effects with the new updates, which should be released in the coming months.
Bring headphones, close your eyes and let yourself be carried away by this fantastic auditory experience. Recommended application.