Alda Source Code
General Light-weight Music Programming Language
When someone runs an alda script, their code is first converted into Clojure code which creates a map of the score. That is then used to produce sounds that the alda code described.
Alda is purely domain-specific. It only allows for the description of different lines of music. There are no loops or conditionals, so the language is not turing complete. There is no computation that can be done with the language other than playing static lines of music.
This is an external DSL. While it is eventually converted into Clojure code it starts off as just a list of lines and list of notes. It is then parsed and converted into other code.
Clojure
It allows for easier and quicker sketching of musical ideas than existing music notation tools. Editing and addition to existing ideas is also much simpler as it doesn't require hard to navigate menus.
Using this instead of a GUI music notation tool limits the type of people who can review and understand the worked created. Installing the program and even writing scripts requires a limited ammount of computer and programming knowledge.