1. A playback control apparatus comprising: a playback controller configured to control playback of first content and second content, the first content is to output first sound which is generated based on text information using speech synthesis processing, the second content is to output second sound which is generated not using the speech synthesis processing, wherein the playback controller causes an attribute of content to be played back to be displayed on the screen, the attribute indicating whether or not the content is to output sound which is generated based on text information using speech synthesis processing.