8. A computer-implemented method comprising causing output of a sequential content and a visual content, wherein output of the visual content is synchronized to output of the sequential content; causing display within the visual content of an output indicator, wherein the output indicator advances during output of the sequential content and indicates a position within the visual content corresponding to a current output position of the sequential content; causing reception of an input pointer referencing an input position within the visual content that is distinct from the position indicated by the output indicator; and during advancement of the output indicator, causing output of the sequential content to be modified based at least in part on a distance between the position indicated by the output indicator and the input position.
11. The computer-implemented method of claim 8 , wherein the input position corresponds to at least one of a word, syllable, letter, sentence, line, paragraph, chapter, stanza, section, or column in the visual content.