<!DOCTYPE html>
<html>
  <head>
    <script src="https://cdn.jsdelivr.net/gh/msqr1/Vosklet@1.1.4/Examples/Vosklet.min.js" async defer></script>
    <script>
      async function start() {
        // Make sure sample rate matches that in the training data
        let ctx = new AudioContext({sampleRate : 16000})

        // Setup mic with correct sample rate
        let micNode = ctx.createMediaStreamSource(await navigator.mediaDevices.getUserMedia({
          video: false,
          audio: {
            echoCancellation: true,
            noiseSuppression: true,
            channelCount: 1,
            sampleRate: 16000
          },
        }))

        // Load Vosklet module, model and recognizer
        let module = await loadVosklet()
        let model = await module.createModel("https://ccoreilly.github.io/vosk-browser/models/vosk-model-small-en-us-0.15.tar.gz","English","vosk-model-small-en-us-0.15")
        let recognizer = await module.createRecognizer(model, 16000)

        // Listen for result and partial result
        recognizer.addEventListener("result", ev => console.log("Result: ", ev.detail))
        recognizer.addEventListener("partialResult", ev => console.log("Partial result: ", ev.detail))

        // Create a transferer node to get audio data on the main thread
        let transferer = await module.createTransferer(ctx, 128 * 150)

        // Recognize data on arrival
        transferer.port.onmessage = ev => recognizer.acceptWaveform(ev.data)

        // Connect to microphone
        micNode.connect(transferer)
      }
    </script>
    <!-- Start and create audio context only as a result of user's action -->
    <button onclick="start()">Start</button>
  </head>
</html>