"Undulator" is more of an exercise in cataloging than it is merely an album. As Feral Maz decided to take a leap and pursue hormone therapy as part of their medical transition as a transgender person, he was excited and eager for the physical changes to begin. But Maz was also nervous, knowing that the voice he had been singing with his whole life was going to permanently change and deepen. To combat the fear Maz had regarding losing their old voice, they decided to document the progressing vocal changes in the form of an album.

The concept was simple; three final tracks would be recorded before the commencement of testosterone replacement therapy. The tracks include "Genesis", "Happy" and "Nonbinary Anthem". These three songs would serve to establish a base line for Feral Maz's voice before testosterone therapy. Then for the next twelve months, one track each month would be recorded to document the vocal changes ( if present) that occurred during that month. Vocal recordings were not doctored or re-recorded outside of the initial month in which they were recorded. The final song on the album "Nonbinary Anthem" features one of the last recordings of Maz's voice prior to the use of testosterone as well as Maz's voice after one full year of testosterone therapy.

"Undulator" is a special album that celebrates change, transgender identity, ingenuity and the rebellious act of being one's authentic self.