From the landing page:

> Artists can use text prompts to shape the music, while controlling the key, BPM, and other characteristics.

Sigh.

All I want is the ability to take an existing piece of music that I've already written, and then use a sort of "auto-accompaniment Band in a Box style" to add additional complementary instruments. Being able to analyze a purely melodic piece and generate possible percussive layers would be a lot of fun.