Speech Agent - Static behind voices after applying update today

I'm using Captivate version 4.0.1 bld 1658.  Last week I used Paul for my speech agent and he had a mild robotic tin-canny sound behind his voice, which is fine.  Today I applied an update (help --> updates) to address not being able to hear the audio when previewing only one slide.  After updating, both Paul and Kate now have static in their voices.  I listened to audio I created last week, I still hear tin can background.  I import the same audio into a new project created today, static.  Recompile audio in previous project, static behind the voice.  When listening to the video with headphones, the static is very disturbing.

What can I do to fix the speech agent voices?  Can the encoding settings be modified for text to speech?