CPV code 72212521 designates Music or sound editing software development services in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
72212521 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 72212520 (Multimedia software development services).