You can create a wav file of a written text using this command

echo "It's such a beautiful day! Why are you in front of the computer?" | festival --tts
echo "It's such a beautiful day! Why are you in front of the computer?" | text2wave -scale 50 -o beautiful_day.wav

Festival is a speech synthesizer for Linux. You can use this with the following commands…

Enter a festival console for more operations

festival
festival> (SayText "Hello world! Isn't the weather excellent today.")

Read a file…

festival --tts hello.txt

Just read some text.

echo "Hello world! Isn't the weather excellent today." | festival --tts

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