We provide a SSML editor which allows you to use the following features: Pitch – Adjust the pitch of the voice to deepen or soften a voice.  Emphasis (volume) – Increase or decrease the emphasis of a specific word or sentence to add more dynamic voices. Rate – The speaking rate allows you to increase or decrease the speed of voice. Pronunciations – Our Pronunciation Library allows you to save custom pronunciations you use frequently and automatically have them applied to all uploaded texts. Pauses – Add custom pauses anywhere for different punctuation marks to create a more natural speaking tone.