A short following TMC's April 28 airing of "The Big Country" was a 1937 Fitzpatrick's Traveltalk "Rocky Mountain Grandeur," featuring an uncredited but unmistakably Carson Robsion and the Buckaroos. The estimable Pearl Mitchell's warbling soprano kicks off the film with full orchestral and chorus included, but not limited to the Buckaroos. "Folk" songs plugged into the soundtrack include a readily recognizable CJR lead vocal on "Chisholm Trail" featuring a largely unadorned Buckaroos sound; "Ain'tcha comin' out tonight," with Bill Mitchell's banjo punched up with trumpets and brass, a schmaltzy "Home on the Range," by Pearl and mixed chorus. Interestingly, the melody is the one penned by David Guion in the early '30s, and not the original that Robison recorded with Vernon Dalhart in 1927. Apparently the storm of popularity for Guion's rendition following Bing Crosby's 1933 worldwide smash hit (and Franklin D. Roosevelt's much-publicized approbation) induced CJR and his handlers to jump in and reappropriate Dr. Higley's poem. Shot in the Tetons and Rocky Mountains in staggering Technicolor, the film's sweeping and often grandiose score is credited to Nathaniel and Jack Shilkret, major operatives in the Victor studios where CJR had been hired on staff shortly after moving to New York from his native Kansas in 1924. Here is a link to a little more information about the film: http://www.imdb.com/title/tt1343984/

Sorry, there's no whistling.