Holly Herndon has released a new artificial intelligence tool -- which the composer is also referring to as her "digital twin" -- called "Holly " that allows users to upload any polyphonic audio and receive a new version of that music sung in Herndon's own voice. Herndon has been working extensively at the intersection of music and AI technology over the past several years (she previously earned a Ph.D. at Stanford's Center for Computer Research in Music and Acoustics). In 2019, she released an album, Proto, which she made with the help of a neural network she developed named Spawn. While Herndon "grew" Spawn by exposing it to her own voice, the neural network ultimately created its own sounds instead of mimicking Herndon's voice like Holly . Herndon released and developed Holly in collaboration with Never Before Heard Sounds.