Managing playback of synchronized content

A computing device may provide a control interface that enables the user to manage the synchronized output of companion content (e.g., textual content and corresponding audio content). For example, the computing device may display a visual cue to identify a current location in textual content corresponding to a current output position of companion audio content. As the audio content is presented, the visual cue may be advanced to maintain synchronization between the output position within the audio content and a corresponding position in the textual content. The computing device may adjust the speed at which the audio content is presented and the visual cue is advanced based at least in part on an input corresponding to the user's performance on a task (e.g., a speed on an exercise machine).