StepAudio 3 Music Technical Report StepAudio 3 Music is a large-scale, long-form music generation model that supports explicit musical planning and open-domain text-controlled generation, according to its technical report. The model's StepAudio Music Tokenizer represents audio as a 50-Hz stream from a 65536-entry single codebook using semantically informed self-supervision. We introduce StepAudio 3 Music, a large-scale, long-form music generation model that supports explicit musical planning and open-domain text-controlled generation. The StepAudio Music Tokenizer represents audio as a 50-Hz stream from a 65536-entry single codebook, using semantically informed self-su