NARA: “The Moving Image and Sound Branch is pleased to announce that the sound recordings of RG 267: Records of the Supreme Court of the United States have been fully digitized and are available for listening and download through the National Archives Catalog. The audio recordings in Record Group 267 are organized into three series,  Sound Recordings of Oral Arguments – Black Series, October 1955 – December 1972, Sound Recordings of Oral Arguments – Red Series, December 1972 – June 27, 2005, and Sound Recordings of Oral Arguments – Gold Series, October 3, 2005 – May 31, 2020.”