24. The computer-implemented method of claim 20 further comprising: identifying a substantial acoustic similarity between a first word string of the item of textual content and a second word string of the textual transcription; and identifying a subregion of the item of audio content that corresponds to the first word string; wherein the first word string occurs substantially within the uncertain region in the item of textual content; and wherein the content synchronization information further facilitates the synchronous presentation of the first word string in the item of textual content and the corresponding subregion of the item of audio content.
24. The computer-implemented method of claim 20 further comprising: identifying a substantial acoustic similarity between a first word string of the item of textual content and a second word string of the textual transcription; and identifying a subregion of the item of audio content that corresponds to the first word string; wherein the first word string occurs substantially within the uncertain region in the item of textual content; and wherein the content synchronization information further facilitates the synchronous presentation of the first word string in the item of textual content and the corresponding subregion of the item of audio content. 26. The computer-implemented method of claim 24 , wherein the first word string comprises at least a threshold number of words.