A production music library (sometimes “stock” or “library music”) is a catalogue of pre‑cleared tracks owned or controlled by a single publisher or label and licensed on a non‑exclusive or exclusive basis to audiovisual producers. Libraries offer quick, cost‑effective alternatives to commissioning original scores or licensing commercial hits: users search by genre, mood, or tempo, pay a standardized fee (or operate under a blanket agreement), and obtain all necessary rights in one transaction.