A normal STT workflow
A recorded customer call is uploaded, the service detects speech, maps sounds to words, and returns a transcript. An LLM can then summarize that transcript, extract objections, or turn it into content. STT does the listening; the LLM does the language work that follows.
What changes transcription quality
- Microphone quality and background noise.
- Accents, dialects, and speaking speed.
- Overlapping speakers.
- Language and vocabulary configuration.
- Names, technical terms, and rare words.
- Whether audio is live, short, or a long recording.
A confidence score is not a guarantee
Speech services may return confidence estimates, but a high score does not mean every proper name, number, or technical term is correct. Review the parts that drive a decision, payment, medical record, legal record, or published claim.