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Test SpeechSynthesisUtterance volume attribute #9642

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Test SpeechSynthesisUtterance volume attribute #9642

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2391cff
Create SpeechSynthesisUtterance-volume-attribute-test-manual.html
guest271314 Feb 23, 2018
b5a666a
Merge pull request #1 from guest271314/guest271314-speech-api-tests
guest271314 Feb 23, 2018
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39 changes: 39 additions & 0 deletions speech-api/SpeechSynthesisUtterance-volume-attribute-test-manual.html
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<!DOCTYPE html>
<html>

<head>
<title>5.2.3 SpeechSynthesisUtterance volume attribute test - manual</title>
<script>

var text = "hello universe";
var volumes = [0, 0.16666666666666666, 0.3333333333333333, 0.5, 0.6666666666666666, 0.8333333333333333, 0.9999999999999999];

window.speechSynthesis.cancel();

function handleVoicesChanged() {
volumes.forEach(function(volume) {
var utterance = new SpeechSynthesisUtterance();
utterance.text = "hello universe";
/* https://w3c.github.io/speech-api/speechapi.html#utterance-attributes
volume attribute
This attribute specifies the speaking volume for the utterance.
It ranges between 0 and 1 inclusive, with 0 being the lowest volume and 1 the highest volume, with a default of 1.
If SSML is used, this value will be overridden by prosody tags in the markup.
*/
utterance.volume = volume;
// does the volume of audio output change?
// https://github.com/w3c/web-platform-tests/issues/8795
window.speechSynthesis.speak(utterance);
});
};

window.speechSynthesis.onvoiceschanged = handleVoicesChanged;
window.speechSynthesis.getVoices();

</script>
</head>

<body>
</body>

</html>