Would love to know the answer to that as well. It would be amazing to be able to automate the funneling of App Store data into Salesforce.

Were you able to solve your problem and can you share a code solution? It seems that Apple's Speech Recognition framework is limited to 1000 requests per hour and device, and can process at most 1 minute of transcription, so I am not sure how you manage to transcribe 1+ hour of audio.