Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country. PD-US-record-expiredPublic domain sound recording in the United States//commons.wikimedia.org/wiki/File:Polonaise_militaire_in_A_major-Brunswick_15098-Josef_Hofmann.mp3

Not all audio files are "sound recordings". Sounds accompanying a motion picture or other audiovisual work are not sound recordings under U.S. copyright law. Use this template's equivalent, {{PD-US-expired}}, for works that are not sound recordings.