A system for output of supplemental audio information, the system comprising: one or more data stores that store audio content and one or more items of supplemental audio information, wherein each of the one or more items of supplemental audio information is associated with one or more playback positions within the audio content, and wherein the items of supplemental audio information are categorized into one or more information categories; an input device that obtains an input of a user; a display device that presents information regarding the audio content; an output device that outputs the audio content; and a processor in communication with the one or more data stores, the input device and the output device, the processor operative to: cause output of the audio content via the output device; determine that one of the one or more items of supplemental audio information is associated with a current playback position within the audio content; obtain input from the user indicating at least one desired information category; determine whether the one item of supplemental audio information is in one of the at least one desired information category; cause output, via at least one of the output device and the display device, of an indication that supplemental audio information is available for playback, if it has been determined that the one item of supplemental audio information is in the at least one desired information category; obtain input from the user indicating that the determined item of supplemental audio information should be played; and cause output of the determined item of supplemental audio information via the output device. one or more data stores that store audio content and one or more items of supplemental audio information, wherein each of the one or more items of supplemental audio information is associated with one or more playback positions within the audio content, and wherein the items of supplemental audio information are categorized into one or more information categories; an input device that obtains an input of a user; a display device that presents information regarding the audio content; an output device that outputs the audio content; and a processor in communication with the one or more data stores, the input device and the output device, the processor operative to: cause output of the audio content via the output device; determine that one of the one or more items of supplemental audio information is associated with a current playback position within the audio content; obtain input from the user indicating at least one desired information category; determine whether the one item of supplemental audio information is in one of the at least one desired information category; cause output, via at least one of the output device and the display device, of an indication that supplemental audio information is available for playback, if it has been determined that the one item of supplemental audio information is in the at least one desired information category; obtain input from the user indicating that the determined item of supplemental audio information should be played; and cause output of the determined item of supplemental audio information via the output device. cause output of the audio content via the output device; determine that one of the one or more items of supplemental audio information is associated with a current playback position within the audio content; obtain input from the user indicating at least one desired information category; determine whether the one item of supplemental audio information is in one of the at least one desired information category; cause output, via at least one of the output device and the display device, of an indication that supplemental audio information is available for playback, if it has been determined that the one item of supplemental audio information is in the at least one desired information category; obtain input from the user indicating that the determined item of supplemental audio information should be played; and cause output of the determined item of supplemental audio information via the output device.