Which service analyzes audio to transcribe speech into text?

• A. Amazon Polly
• B. AWS CloudTrail
• C. Amazon Translate
• D. Amazon Transcribe

Answer: (D)

The main concept here is automatic speech recognition in AWS—turning spoken words in audio into written text. The service that does this is Amazon Transcribe. It is designed to analyze audio or video and produce accurate transcripts, supporting both batch transcription and real-time streaming. It also offers helpful features like timestamps, confidence scores, speaker diarization, multiple language support, and custom vocabulary for domain-specific terms, which makes transcripts more usable for applications like call centers, subtitling, or meeting notes.

In contrast, Amazon Polly is a text-to-speech service that converts written text into spoken audio; AWS CloudTrail logs API activity for auditing; and Amazon Translate translates text from one language to another. These distinctions show why Amazon Transcribe is the best fit for turning speech in audio into written text.