Azure Cognitive Services – Speech

Overview

Azure Speech Service provides advanced speech-to-text, text-to-speech, and speech translation capabilities. It enables developers to add natural language interaction to applications, devices, and services.

• Real‑time Speech Recognition
• Batch Transcription
• Custom Voice Models
• Speech Translation

Quickstart – JavaScript (Browser)

Below is a minimal example that captures microphone audio and displays the recognized text.

<script src="https://aka.ms/csspeech/jsbrowserpackageraw"></script>
<script>
  const subscriptionKey = "YOUR_SUBSCRIPTION_KEY";
  const serviceRegion = "YOUR_SERVICE_REGION";

  const speechConfig = SpeechSDK.SpeechConfig.fromSubscription(subscriptionKey, serviceRegion);
  speechConfig.speechRecognitionLanguage = "en-US";

  const audioConfig = SpeechSDK.AudioConfig.fromDefaultMicrophoneInput();
  const recognizer = new SpeechSDK.SpeechRecognizer(speechConfig, audioConfig);

  recognizer.recognized = (s, e) => {
      if (e.result.text) {
          document.getElementById("result").textContent = e.result.text;
      }
  };

  recognizer.canceled = (s, e) => {
      console.error(e);
      recognizer.stopContinuousRecognitionAsync();
  };

  const startBtn = document.getElementById("start");
  startBtn.onclick = () => {
      startBtn.disabled = true;
      recognizer.startContinuousRecognitionAsync();
  };
</script>