RjDj has made a name for itself by producing mind-bending mobile audio experiences. All has been quiet from the company in the past few years but now it’s back with Hear, an iOS app it hopes will transform your relationship with the sounds around you. The app requires headphones and is made up of seven scenes that affect audio around you in different ways. Some are practical (enhancing speech so you can hear it more clearly over background noise) while others are designed to just make the world sound more interesting and enjoyable. The ‘Happy’ scene, for example, adds effects to the…

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