polly.sh

#!/usr/bin/env bash
if [ -z "$1" ]
then
    read -p "Please enter text: " TEXT
else
    TEXT=$1
fi

if [ -z "$2" ]
then
    read -p "Pick a voice: " VOICE
    if [ -z "$VOICE" ]
    then
        VOICE="Justin"
    fi
else
    VOICE=$2
fi

# aws polly describe-voices will list all voices
# aws polly describe-voices --query 'Voices[?starts_with(LanguageCode, `en`)]' limits to only English speaking voices
aws polly synthesize-speech 'pol_bash.mp3' --text "$TEXT" --output-format 'mp3' --voice-id "$VOICE"

afplay pol_bash.mp3