Musical works cover songs, choruses, operas, musicals, operettas. These could be solos (played with one instrument, sonatas, chamber music (played with a few instruments or bands, orchestras played with several instruments). In business valuation analysis, Musical Works are classified as intangible assets because they are recognisable and the potential value can be accurately measured. Intangible assets are a class of assets without physical form (such as a building) which generate economic benefits to the owners. To estimate the fair market value of musical works, business valuation analysts apply techniques under the market, asset and income valuation methods. Owners of musical works appropriate exclusive rights over the economic benefits associated with their work through intellectual property rights registration which bars third parties from infringing on such works.