A cassette-tape library is an outdated concept in the modern era of digital music. However, if we were to find synonyms for cassette-tape library, we could use the terms audio-tape archive, magnetic tape collection, tape library, cassette archive, and cassette collection. These terms signify a collection of music or other recordings that have been stored on cassette tapes and are no longer in regular use. These synonyms highlight the reality that the music industry has evolved, and music lovers now prefer digitized music formats. Nevertheless, these synonyms preserve the memory of the cassette-tape library era as a symbol of a time gone by.