NLP Cloud Speech Synthesis Adapter is a Text-to-Speech (TTS) API that converts written text into natural-sounding human speech. It uses Microsoft’s Speech T5 model to generate high-quality .wav audio files from text input. The generated audio is securely hosted on a CloudFront CDN, and the API returns a URL that can be streamed, downloaded, or embedded in applications. Speech synthesis (also known as text-to-speech or voice synthesis) is about turning a piece of text into audio.