Once upon a time, I suppose, people sat around and told stories to each other around a cooking fire. The older ones told the younger ones, who told their younger ones. Eventually, one family group passed along their stories to another family group.
Thus, the oral tradition of storytelling was born.
At some point in time, people figured out letters and the materials to write them on. They took the stories that had been told and passed down from generation to generation orally and wrote them as text.
The written story was born.
Much later, people invented devices that could capture the sound of the human voice, store it, and repeat it for others to hear - across the street or around the world. These devices changed shape and form, but they all worked in an analog fashion - capturing sounds for reproduction.
The audio recorded story was born.
In the last couple of decades, a new way of recording the story emerged: digital. The sound source was recorded by breaking it down and storing it digitally. Not only could the sounds be reproduced, they could be reproduced over and over, without any degradation of quality.
The digital story was born.
Now here we are, in the digital age, texting, tweeting, IMing, voice calls, emails, etc., all using a digital form of communication. Sometimes, even when we're in the same room or under the same roof.
Kinda like sitting around a cooking fire, telling stories...