# RT-Voice PRO - EmotionML Works with MaryTTS. ## Examples You can use the SSML prosody element to modify the the speech output of a voice. The SSML definition for the prososdy element specifies attributes for pitch, rate, volume, contour, range, and duration. EmotionML markup explicitly refers to one or more separate vocabularies used for representing emotion-related states. EmotionML markup explicitly refers to one or more separate vocabularies used for representing emotion-related states. ## More information * [EmotionML](https://www.w3.org/TR/emotionml/) * [EmotionML - Emotions](https://www.w3.org/TR/emotion-voc/)