Riffusion deals in 12-second snippets.Screenshot: RiffusionOver at Riffusion, the approach is slightly different: You start by typing in the lyrics you want for your AI-generated piece of music, and the app then comes up with vocals and instrumentation that fit. You can tweak the sound style with a click and even come up with your own custom music style, and the AI will make suggestions if you want it to.You don’t even need to register an account to start riffing, but if you do sign up for free, you get access to more features—like the ability to download the stems (or individual components) of your track to use elsewhere. There’s currently a 12-second limit on your tunes, so it suits creating music for social media posts and quick audio snippets.