SpeechSynthesisUtterance: volume property
The volume
property of the SpeechSynthesisUtterance
interface gets and sets the volume that the utterance will be spoken at.
If not set, the default value 1 will be used.
Value
A float that represents the volume value, between 0 (lowest) and 1 (highest.)
If SSML is used, this value will be overridden by prosody tags in the markup.
Examples
js
const synth = window.speechSynthesis;
const inputForm = document.querySelector("form");
const inputTxt = document.querySelector("input");
const voiceSelect = document.querySelector("select");
const voices = synth.getVoices();
// ...
inputForm.onsubmit = (event) => {
event.preventDefault();
const utterThis = new SpeechSynthesisUtterance(inputTxt.value);
const selectedOption =
voiceSelect.selectedOptions[0].getAttribute("data-name");
for (let i = 0; i < voices.length; i++) {
if (voices[i].name === selectedOption) {
utterThis.voice = voices[i];
}
}
utterThis.volume = 0.5;
synth.speak(utterThis);
inputTxt.blur();
};
Specifications
Specification |
---|
Web Speech API # dom-speechsynthesisutterance-volume |
Browser compatibility
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