Thanks to BuroDestuct for this video by two designers, Michael Flückiger and Nicolas Kunz. They are probably better explaining it than me:
“For our bachelor thesis, we engaged ourselfs with dynamic typography, especially with dynamic typefaces. Since not much work has been done in this field, we devised a system in which a typeface would not be defined static fonty styles anymore but would be able to change it‘s shape and appearance at any moment reacting to a broad spectrum of inputs.”