by Mike Snedden

In 1946, Bill Monroe wrote a song that would become the bluegrass genre’s unofficial anthem. Blue Moon of Kentucky was originally a classic, mournful waltz. Written in 3/4 time, it captured the high lonesome sound perfectly, a slow, triple-meter rhythm that felt like a heartbeat echoing through the Appalachians. Click here to listen to the original version.

The song’s DNA changed forever in 1954 at Sun Records. A young truck driver named Elvis Presley was struggling to find a B-side for his first single. During a break, Elvis started clowning around, mocking Monroe’s waltz by singing it at a breakneck speed with a driving, 4/4 rockabilly beat. Producer Sam Phillips heard something special and told him, “Keep doing that!”  Click here to listen to Elvis’ version.

When the high-speed version hit the airwaves, Monroe didn’t get angry—he got smart. Recognizing the song’s new potential (and the incoming royalty checks), Monroe took his Blue Grass Boys back into the studio. In a stroke of genius, he recorded a hybrid version.  He started the song as a traditional, slow 3/4 waltz, then shouted “Get it!” and shifted the band into a blistering 4/4 drive.  Click here to listen to Bill Monroe’s hybrid version.

By embracing Elvis’s energy, Monroe bridged the gap between old-time tradition and the birth of Rock ‘n’ Roll. It remains the ultimate example of how bluegrass is a living, breathing, and highly adaptive art form.