A method of generating content defined by a file of a prescribed format. A portion of a first work of content is automatically identified responsive to a user selection thereof. The first work of content may be audio, video, and still images. A reference to the portion of the first work of content is generated responsive to the identifying. Instructions associated with the portion of the first work of content operable for use by a playback device to render the content are generated. The reference and the instructions are incorporated in a digital file of a prescribed format operable for use by the playback device during rendition of the content. The file may be stored in a memory component. The playback device is operable to use the reference to access the portion of the first work of content from a source other than the file during rendition of the file.