Takt: A read-eval-play-loop interpreter for a structural/procedural score language

A new language for describing musical scores as well as its interpreter is developed. The language allows a concise description of note and chord sequences, and at the same time, it provides rich programming functionalities with Clike syntax, which are useful for algorithmic composition. Representing structures in music such as repetitive occurrences of a common phrase or its variation is supported with macros and phrase transformation modules. The interpreter enables us to execute its program code interactively with a read-eval-play loop. The interpreter can also be used for the real-time processing of MIDI events coming from input devices. The language is extensible in that C functions can be called from its program code.