any physical medium that holds recorded sound
Archivists now use the term phonorecord primarily in the context of copyright law, and usually while quoting such law. Thus, although this term is used by archivists, it is more so a term of art in law, allowing for a single term to cover any format, analog or digital, of sound recording media. This term is essentially an historical relic in archival discourse. When needed, archivists usually replace it with audio medium or simply medium. A recording of both audio and visual information is not a phonorecord.