macOS: Text to Speech Command - say examples

If you want to covert text to speech on your macOS Terminal you can make use of say command,

say [-v voice] [-f file | string ...]

% say "Hello therehow are you?"

% say -v Alice "Hello, my name is Alice!"

% say -v Alice -f my-speech-text.txt

bash-3.2$ echo "This message has been read from an external file" > my-speech-text.txt
bash-3.2$ say -v Alice -f my-speech-text.txt
bash-3.2$