Speech-to-Text AI uses artificial intelligence to convert spoken words into written text by processing audio signals, extracting features from the speech, and mapping these features to primitive sound units. The system combines the output of acoustic and language models to produce accurate transcriptions. Speech-to-Text AI has various applications across domains such as virtual assistants, meeting transcription tools, customer support chatbots, healthcare documentation, accessibility tools, language learning apps, media subtitle generation, and more. Building an effective Speech-to-Text AI system requires high-quality training data, which can be challenging due to issues like limited accent diversity, imperfect annotations, and domain-specific jargon. Advanced audio annotation tools like Encord streamline the data preparation process with precise, collaborative audio annotation and AI-assisted pre-labeling, ensuring that Speech-to-Text models are trained on high-quality, well-organized datasets.