NirCmd Command Reference - speak

speak [type] [text/Filename] {rate} {volume}

• text: The second parameter contains a simple text.
• xml: The second parameter contains a text with Speech xml data.
• file: The second parameter contains a text filename.

The {rate} parameter is optional parameter that you can specify the Speech rate, a value between -10 (very slow) and 10 (very fast). The {volume} parameter is optional parameter that you can specify the volume of the Speech, a value between 0 and 100.

Examples:
speak text ~$clipboard$
speak text "Please visit the Web site of NirSoft at http://www.nirsoft.net" 2 80
speak file "c:\temp\speak1.txt"