The process of preparing a program for a live performance is an extremely fulfilling one, not only because it can be artistically and spiritually rewarding, but also because it can be a technical challenge much like designing computer programs or systems. Performances may embed various art forms, such as song, dance, lighting and stage-play. The mediums for coordinating such performances are varied and rarely precise. We construct and describe Programmart, a specification language for writing concert programs, which leverages programming language features to handle the intricacies of crafting a live performance.