AI in music is no longer a single technology or a single debate. By 2026 it is a working set of categories with different rights questions, different platform behavior, and different implications for independent artists. This authority hub gathers the From The Stem reporting on what is actually shipping, what is being announced, and what is being decided in court and at the Copyright Office. The coverage runs across four working areas. AI production tools covers stem separation, mastering, vocal tuning, and the assistive tools producers are actually using in working sessions today. AI rights and policy covers voice cloning, training data, Copyright Office guidance, RIAA litigation, and the emerging legal scaffolding around generative music. AI discovery and detection covers how streaming platforms label, detect, and demote AI-generated music, and what authenticity signals matter for an independent catalog. AI search and citations covers how generative search systems read music coverage, what AI answer engines cite, and how authoritative sourcing earns inclusion in machine-readable answers. The hub applies the same skepticism From The Stem applies to any new platform shift, and is updated as legal rulings and platform policy change.