Karl Marx Farr was born on April 25, 1909, in Rochelle, Texas and died on 22 September 1961. He played guitar for the Sons of Pioneers. 

http://www.bobnolan-sop.net/Biographies/The%20Story%20of%20SOP/Karl%20Farr/Karl%20Farr.htm

Bio taken from Wiki: "Larry Finley (May 14, 1913 – April 3, 2000) was a late-night broadcast pioneer, as well a leader in the audiotape (I.T.C.C. - International Tape Cartridge Corporation and NAL - North American Leisure Corporation) and videotape business and the founder of the Progressive Broadcasting System (PBS) radio network."