Sound recording of Senator John F. Kennedy of Massachusetts reading the Declaration of Independence. A recording of Senator Kennedy’s reading was broadcast on WQXR Radio in New York, on July 4, 1957, as part of the station’s observance of the Fourth of July.
Video
On the original audio available at the JFK Library website, an unidentified speaker introduces Senator Kennedy’s reading; the date of the recording of the introduction is not known (John F. Kennedy was a senator at the time his reading was recorded, but the speaker in the introduction refers to him as President).
Source: https://www.jfklibrary.org/asset-viewer/archives/USIAAU/USIAAU-039/USIAAU-039