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say is a Terminal command used to render text into audible speech using the Speech Synthesis manager. The output may optionally be saved to a AIFF file.


To say "Hello, how are you today?" in the default voice

  say "Hello, how are you today?"

To say a phrase using the Hysterical voice

 say -v "Hysterical" "What?  You still use windows XP?"

To read the say man page in the default voice (ctrl-c will quit it)

 man say | say

Man Page Excerpt

This tool uses the Speech Synthesis manager to convert input text to audible speech and either play it through the sound output device chosen in System Preferences or save it to an AIFF file.