say

Converts text to speech. More information: https://ss64.com/osx/say.html.

• Say a phrase aloud:
  say "{{I like to ride my bike.}}"
• Read a file aloud:
  say --input-file={{filename.txt}}
• Say a phrase with a custom voice and speech rate:
  say --voice={{voice}} --rate={{words_per_minute}} "{{I'm sorry Dave, I can't let you do that.}}"
• List the available voices (different voices speak in different languages):
  say --voice="?"
• Say something in Polish:
  say --voice={{Zosia}} "{{Litwo, ojczyzno moja!}}"
• Create an audio file of the spoken text:
  say --output-file={{filename.aiff}} "{{Here's to the Crazy Ones.}}"