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 -f {{filename.txt}}

Say a phrase with a custom voice and speech rate:

say -v {{voice}} -r {{words_per_minute}} "{{I'm sorry Dave, I can't let you do that.}}"

List the available voices:

say -v "?"

Create an audio file of the spoken text:

say -o {{filename.aiff}} "{{Here's to the Crazy Ones.}}"