In the northern high woodlands, there lived a clan of ancient and mystical Treefolk. During the first new moon of spring, these Treefolk could be heard grafting limbs to create their young by splicing bits of branches from each generation, resulting in the next line of Treefolk. These new beings carry the essence of all their ancestors in their new skin. These sounds are partly old and partly new, and are known as "Fable".

The Fable Granular Soundscape Generator is a tool that allows for a storybook adventure. It creates new sonic adventures with its five granular delay programs, which are based on sample and chop algorithms. The Fable uses a dual feedback path developed by DSP engineers at Walrus Audio, which runs the signal through two separate effects in series (independently controlled by the Feedback and Regen Knobs), before running the signals back through both DSP chips again, creating unique soundscapes ranging from smooth, flowing ambiance to bizarre, organic reverberance, and chaotic, glitchy swarms.

The granular effect is a digital processing technique for micro-sampling, in which short samples called grains are read from a delay buffer. In the Fable, players can adjust these grains by manipulating their sampling length, position, and buffer size from which they're read. They can also play them at double or half speed for pitch shift and time stretching effects, play them in reverse, read from multiple positions, and more, to achieve different effects.

It is a powerful but complex technique, and the Fable has five streamlined programs that explore different aspects of its sonic range.