6. A computer-implemented method comprising: retrieving a first content item from a first content source and a second content item from a second content source, wherein the first content source is different from the second content source; identifying first text-to-speech voice data based at least in part on a characteristic of the first content item; determining that the second content item comprises a first portion and a second portion; identifying second text-to-speech voice data and third text-to-speech voice data based at least in part on a characteristic of the second content item, wherein the first text-to-speech voice data is different from the second text-to-speech voice data; generating a first audio presentation of the first content item utilizing the first text-to-speech voice data; generating a second audio presentation of the second content item utilizing the second text-to-speech voice data with the first portion, and using the third text-to-speech voice data with the second portion; and assembling an audio program comprising the first audio presentation and the second audio presentation.
9. The computer-implemented method of claim 6 , wherein the audio program comprises streaming audio and wherein the streaming audio comprises the first audio presentation and the second audio presentation.