GPT PDF

 https://nanonets.com/blog/chat-with-pdfs-using-chatgpt-and-openai-gpt-api/

Google tts audio generation

https://cloud.google.com/text-to-speech/docs/audio-profiles

 To generate an audio file, make a POST request and provide the appropriate request body. The following shows an example of a POST request using curl. The example uses the access token for a service account set up for the project using the Google Cloud Platform Cloud SDK. For instructions on installing the Cloud SDK, setting up a project with a service account, and obtaining an access token, see the Quickstarts.

The following example shows how to send a request to the text:synthesize endpoint.

curl \
  -H "Authorization: Bearer "$(gcloud auth print-access-token) \
  -H "Content-Type: application/json; charset=utf-8" \
  --data "{
    'input':{
      'text':'This is a sentence that helps test how audio profiles can change the way Cloud Text-to-Speech sounds.'
    },
    'voice':{
      'languageCode':'en-us',
    },
    'audioConfig':{
      'audioEncoding':'LINEAR16',
      'effectsProfileId': ['telephony-class-application']
    }
  }" "https://texttospeech.googleapis.com/v1beta1/text:synthesize" > audio-profile.txt

If the request is successful, the Text-to-Speech API returns the synthesized audio as base64-encoded data contained in the JSON output. The JSON output in the audio-profiles.txt file looks like the following:

{
  "audioContent": "//NExAASCCIIAAhEAGAAEMW4kAYPnwwIKw/BBTpwTvB+IAxIfghUfW.."
}

To decode the results from the Cloud Text-to-Speech API as an MP3 audio file, run the following command from the same directory as the audio-profiles.txt file.

sed 's|audioContent| |' < audio-profile.txt > tmp-output.txt && \
tr -d '\n ":{}' < tmp-output.txt > tmp-output-2.txt && \
base64 tmp-output-2.txt --decode > audio-profile.wav && \
rm tmp-output*.txt