Use OpenAI Whisper Model

[EA914]

Hi DevMiser:

I suggest that instead of using Picovoice you just use OpenAI's speech-to-text API via their "whisper" model. Check my github for example code. This would simplify your code and prevent the need for multiple API keys.

Also might I suggest having your API keys in a .env file instead of in the code itself.

Thank you!

-Evan Alexander