PhonoPaper is a camera app that allows you to play pictures with encoded sound. Developed by Alexander Zolotov, this app offers a unique way to combine visual and auditory experiences. With PhonoPaper, you can also create your own codes by recording 10 seconds of sound from a microphone and converting it into an image.

One of the standout features of PhonoPaper is that it does not require access to the network for decoding. The PhonoPaper code is analogue, making it less sensitive to image distortion. Even with a bad camera or a dark picture, you will still be able to hear the "silhouette" of the original sound. Additionally, you can play the code in real-time with hand-controlled speed and direction, allowing for a personalized audio experience. Moreover, you can draw the code by hand to create unique and unusual sounds.

PhonoPaper has a wide range of applications, including voice messages or pieces of music on t-shirts, billboards, posters, and postcards. It can also be used as audio labels for phonorecords, audio examples in books, secret messages, and art experiments.

Using PhonoPaper is simple. Just launch the app, point the camera at the code, and smoothly scan the picture from left to right. The code should be parallel to the frame, and the black code markers should fall entirely into the frame. If the application recognizes the code markers, you will hear a sound. For smoother playback, you can also enable automatic scanning by pressing the record button on the right side of the screen.

PhonoPaper is a fascinating app that combines visual and auditory elements in a unique way. Whether you want to listen to audio messages hidden in pictures or create your own audio codes, PhonoPaper offers a creative and immersive experience.