If you want a straightforward way to convert speech to text from an MP3, especially if it’s a single voice like your own, you can skip the more complex VoIP/Asterisk setups and go with modern automatic speech recognition tools.

I actually built a speech to text browser extension that does exactly this:

• Works directly in your browser (no install or server setup)

• Lets you drag & drop an MP3 or other audio file to transcribe audio to text

• Uses Whisper by OpenAI for accurate voice to text

• Works well for conference recordings, meeting notes, and voice memos

You can try it here: https://chromewebstore.google.com/detail/speech-to-text/jolafoahioipbnbjpcfjfgfiililnoih