I have listened to hundreds of cowboy songs in the last 2 months, looked at all the instruments, studied how banjos and dobros work. It was a week and a half of work to combine classical elements of cowboy music with modern film music in the style of Hans Zimmer (and others) so that it sounds coherent, not old-fashioned, but still conveys "cowboy feeling". Now enjoy the original trailer music to the soon to be released Pullman City movie.