As a musician and storyteller who channels his heart and soul to his fans using nothing more than his voice and acoustic guitar, Glen Hansard has developed a singular knack for delivering his songs across multiple mediums.

The Irish singer-songwriter surged to fame in 2007 when the sleeper-hit musical Once became a critically acclaimed and immensely popular movie. Hansard was still plying his music on the streets of Dublin shortly before the film took off, ultimately earning him a...