A studio album is an original collection of new tracks by a recording artist. It usually does not contain live recordings and/or remixes, and if it does, those tracks do not make up majority of the album and are often "bonus tracks". Due to their prepared nature, they usually contain a variety of flourishes and production techniques, including segues, sound effects, found sound, and band contributions. In the music industry, studio albums are usually contrasted with compilations and live albums. Studio albums are generally considered to be albums proper, containing material that is, in the majority, previously unreleased and original. Most studio albums are original works of music made by the artist recorded in a studio and mastered by other producers and technicians that are usually listed within the album notes.