Sound

• Sound output (requires sound-card) to report the computer's bids and card-play

 

Voice recognition

• Make your bids and play your cards by speaking to the program.  This requires a microphone plugged into your computer's sound-card and a suitable speech-recognition engine*.
  
  

* Speech-recognition is built into Windows (Vista and later).  In Windows XP, you can tell whether you have a speech-recognition engine by going to Control Panel | Speech, sounds and audio devices | Speech and seeing whether a speech recognition engine is listed under "Speech recognition".  If so, search for a file called SAPI.DLL, probably in the Program Files\Common Files\Microsoft shared\Speech folder.  Right-click on it and look at its properties.  It needs to be version 5.1 or later.

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