alt Hacker NewsThere's an International Phonetic Alphabet for transcribing speech literally.[1] Automation is now available. Languages to IPA, IPA to various languages, text to speech, speech to text, evaluation of pronunciation.
[1] https://easypronunciation.com/en/english-phonetic-transcript...
The IPA still relies on convention to transcribe sounds. There's plenty of academic papers out there describing lesser studied languages and, if those conventions don't yet exist, the papers often contradict each other.
A writing system that used strict phonetic transcription for everything would be unusably bad. Everyone pronounces words differently than the writing system prescribes, in every language. Words are shortened and blended together constantly in connected speech.