19. The non-transitory computer-readable storage medium of claim 14 , further comprising program code to identify a second location in the input text for a second breath, and wherein the synthesized speech comprises a second breath sound at the second location.
19. The non-transitory computer-readable storage medium of claim 14 , further comprising program code to identify a second location in the input text for a second breath, and wherein the synthesized speech comprises a second breath sound at the second location. 22. The non-transitory computer-readable storage medium of claim 19 , wherein the second location is based at least in part on a duration of the breath sound.