Say AI: Linux's `say` command-line tool for voice over using OpenAI TTS model.

say.sh

#!/bin/bash

# Function to display help
usage() {
    echo "Usage: $0 [-o output_file] [-v voice] [-m model] [-i input_file] \"input_string\""
    exit 1
}

# Default values
output_file="speech.mp3"
voice="echo"
model="tts-1"
input_file=""
input_string=""

# Parse command-line options
while getopts 'o:v:m:i:h' flag; do
  case "${flag}" in
    o) output_file="${OPTARG}" ;;
    v) voice="${OPTARG}" ;;
    m) model="${OPTARG}" ;;
    i) input_file="${OPTARG}" ;;
    h) usage ;;
    *) usage ;;
  esac
done

# Check for remaining arguments
if [ -z "$input_file" ]; then
    if [ $OPTIND -gt $# ]; then
        echo "Error: Missing input string"
        usage
    else
        input_string="${@:$OPTIND:1}"
    fi
else
    if [ -f "$input_file" ]; then
        input_string=$(<"$input_file")
    else
        echo "Error: Input file does not exist"
        exit 1
    fi
fi

# Prepare parameters for OpenAI API call
PARAM=$(jq -n -c --arg model "$model" --arg voice "$voice" --arg input "$input_string" '$ARGS.named')

# Call OpenAI API to generate speech
curl https://api.openai.com/v1/audio/speech \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d "$PARAM" \
  --output "$output_file"

You have to provide your OPENAI_API_KEY via environmental variable. Simple way to do that is export OPENAI_API_KEY=your_api_key.

Read an original story for more information on usage, thoughts and comments: https://medium.com/@v_ignatyev/text-to-speech-on-linux-mac-using-bash-made-by-chatgpt-4-570ade59c967