Yodio Description

A yodio is an audio narrated published media. You can upload your own images or use ones from the provided library of images.You also can upload audio, select from a music library, or even record audio via your mobile phone (USA only). You can organize your media into folders if you plan to create multiple projects.

Each "scene" is a track, where you drag and drop images and the sound for that image, and you can select transitions between tracks. So if you are going to do a audio narrated story, you would need separate sound files for each section.