text2speech.sh

mkdir -p voices

curl -X POST https://texttospeech.googleapis.com/v1/text:synthesize \
-H "Authorization: Bearer "$(gcloud auth application-default print-access-token) \
-H "Content-Type: application/json; charset=utf-8" \
-d @- << EOF | jq ".audioContent" | sed -e 's/^"//' -e 's/"$//' > /tmp/synthesize-output-base64.txt
{
  "input":{
    "text":"以上になります、ご清聴ありがとうございました。何でもお気軽にご質問ください"
  },
  "voice":{
    "languageCode":"ja-JP",
    "name":"ja-JP-Standard-C",
    "ssmlGender":"MALE"
  },
  "audioConfig":{
    "audioEncoding":"MP3"
  }
}
EOF
base64 /tmp/synthesize-output-base64.txt --decode > voices/synthesized-audio.mp3