You have exposed most of the prosody features (pitch, emphasis, rate, volume, break, phonemes)  and I am thrilled that they all work perfectly! Thank you. I enjoy using them to vary my robot's voice. Still, there is one feature that is only partially exposed and that is "prosody contour. " When I attempt to use prosody contour, the voice is lowered in pitch, but none of the parameters work. I have tried every possible way to get this working, but my parameter changes are ignored. Would you please implement this? 

Reference for SSML - Contour

Code:

Saywait("_angle bracket_ prosody contour='(0%,+20Hz) (10%,+30%) (40%,+10Hz)'_angle bracket_ good morning _angle bracket_ /prosody _angle bracket_ ")