A method comprising: determining by a client device, based at least on history of user input defining audible content playout selections at the client device, a genre of audio that a user of the client device prefers, and establishing by the client device, based on the determined genre, mapping data that correlates each of various types of media content with respective audible punctuation in the form of sound effect or music (402, 404, 408) of the determined genre; receiving into the client device a playlist defining a sequence of media content items (302, 304, 306, 308) for playout by the client device, wherein the playlist indicates respectively for each of a plurality of the media content items (302, 304, 306, 308) which of the types of media content the media content item is; requesting and receiving by the client device from one or more network servers the media content items (302, 304, 306, 308) of the received playlist, and playing out by the client device the received media content items (302, 304, 306, 308) in accordance with the sequence defined by the playlist; and for a given media content item of the plurality of the media content items (302, 304, 306, 308), (i) determining by the client device the indicated type of the given media content item (302, 304, 306, 308), (ii) determining by the client device, based on the determined type of the given media content item (302, 304, 306, 308), the audible punctuation (402, 404, 408) of the determined genre that the mapping data correlates with the determined type of the given media content item (302, 304, 306, 308), wherein the determined audible punctuation (402, 404, 408) is not specified by the received playlist, and (iii) playing out by the client device the determined audible punctuation (402, 404, 408) in connection with playout by the client device of the given media content item (302, 304, 306, 308). determining by a client device, based at least on history of user input defining audible content playout selections at the client device, a genre of audio that a user of the client device prefers, and establishing by the client device, based on the determined genre, mapping data that correlates each of various types of media content with respective audible punctuation in the form of sound effect or music (402, 404, 408) of the determined genre; receiving into the client device a playlist defining a sequence of media content items (302, 304, 306, 308) for playout by the client device, wherein the playlist indicates respectively for each of a plurality of the media content items (302, 304, 306, 308) which of the types of media content the media content item is; requesting and receiving by the client device from one or more network servers the media content items (302, 304, 306, 308) of the received playlist, and playing out by the client device the received media content items (302, 304, 306, 308) in accordance with the sequence defined by the playlist; and for a given media content item of the plurality of the media content items (302, 304, 306, 308), (i) determining by the client device the indicated type of the given media content item (302, 304, 306, 308), (ii) determining by the client device, based on the determined type of the given media content item (302, 304, 306, 308), the audible punctuation (402, 404, 408) of the determined genre that the mapping data correlates with the determined type of the given media content item (302, 304, 306, 308), wherein the determined audible punctuation (402, 404, 408) is not specified by the received playlist, and (iii) playing out by the client device the determined audible punctuation (402, 404, 408) in connection with playout by the client device of the given media content item (302, 304, 306, 308).