fwiw, the commercial services that do this are called "audio forensics" (unsurprisingly, they're usually hired by cops and lawyers). You pay them to use their (

fwiw, the commercial services that do this are called "audio forensics" (unsurprisingly, they're usually hired by cops and lawyers). You pay them to use their (often expensive) software tools to clean up audio and provide a transcription. I get the appeal of automating this task but the SOTA is not to automate it at all.