14. The computer-readable medium of claim 13 , wherein the text string is generated based on metadata associated with or identifying a media asset.
14. The computer-readable medium of claim 13 , wherein the text string is generated based on metadata associated with or identifying a media asset. 15. The computer-readable medium of claim 14 , wherein the operations further comprise: synthesizing a speech segment based on the modified text string; and providing the speech segment to a user device for playback with the media asset on the user device.