YouTube is testing a new feature that will allow creators to use AI to "transform" songs they've licensed for short films. A small group of creators with access can enter prompts to change various elements of the song, such as its mood or genre, and an extension of YouTube's Dream Track AI feature will generate a reworked 30-second soundtrack. 

YouTube says the Dream Tracks experience will allow creators to create songs using the AI-generated voices of artists who agree to participate, including Charlie Puth, Charli XCX, Demi Lovato, and John Legend. It's not yet clear which songs will be available for restyles in this test, or which music labels YouTube is partnering with. However, a Financial Times report in June said YouTube had reached out to major music labels to use their songs to train artificial intelligence models.