How do I control speed of the voice in oddcast gold?

Hi Rich - 

You can use SSML tags to control the rate of speech.

Example - 

 <prosody rate="slow"> this is speaking slowly <prosody rate="fast"> this is speaking fast </prosody> back to slow </prosody>

You can also use percentage values for more precise control - 

Example - 

 <prosody rate="-25%"> this is speaking slowly <prosody rate="+25%"> this is speaking fast </prosody> back to slow </prosody>

This information & more can be found in the API reference do - see Appendix C - 

http://www.oddcast.com/support/docs/vhost_API_Reference.pdf

Note that SSML tags are only supported for voices from Engines #2 and #3.

Hope this helps,

Gil