Abstract: A method in a computer system for authoring media content for a computer application is provided. The authoring is accomplished by making use of a hierarchical structure including media objects, containers to group objects, and meta-containers to group containers and objects, where the media objects are working copies of provided media files. The hierarchical structure is such that when a property or behaviour is assigned to a container, this property is automatically shared to the objects and container therein. Similarly, the containers and objects included in a meta-container share the properties and behaviours assigned to their parent meta-container. Such a method and system can be implemented as an audio authoring tool for video game where a higher-level additional hierarchical structure is provided on top of a lower-level hierarchical structure to route sound assets organized and characterized through the lower-level hierarchy.