Audio Emoticons...yes, we offer a way to do this. However, let me ask you, can you tell one person's throat clearing noise from another?
Cepstral does not include hic-ups, lip-smack, or other emoticons in their database. If you would like to produce any such noises (sneeze, sob, belch, lip-smack, cat-call, etc.,) you can easily record your favorites and call them via
SSML. (See example #7).
Using this SSML technique, you might insert a YAWN in your audio by:
"I can use Cepstral to <audio src='yawn.wav' /> add audio emoticons to my synthesis"