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// The Myth of the Natural Language %%
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// Speech2Design!!
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// Welcome to the core-code of the Speech-to-text
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// The tool we are gonna use is the "Web Speech API".
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// What is an API?
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// An API is a set of defined rules that explain how computers or applications communicate with one another.
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// APIs sit between an application and the web server, acting as an intermediary layer that processes data transfer between systems.
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// GLOBAL VARIABLES
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let interimTranscripts = ""; // Variable for interim results, the Speech-to-text try different worlds before to give us the most correct one.
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let allTheInterim = ""; // Variable to store *all* the interim results
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let finalTranscripts = ""; // Variable for the... final transcripts
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// To define bridges to the html file:
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let speech = document.getElementById("result"); // where to print the final result of the recognition
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let process = document.getElementById("process"); // and here the process, print the current sentence with interim results
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// TEXT STORAGE
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let textStorage = localStorage.getItem("speech"); // This define where to save the results.
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speech.innerHTML = textStorage; // LocalStorage is a type of web storage that allows you to access a local Storage object and store the data in the browser with no expiration date.
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// RESET STORAGE
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let resetStorage = document.getElementById("reset"); // This will just reset, through a button, all the results got by that moment.
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resetStorage.addEventListener("click", () => { // Reset everything!!!
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allTheInterim = "";
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finalTranscripts = "";
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interimTranscripts = "";
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speech.innerHTML = "";
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textStorage = "";
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localStorage.setItem("speech", "");
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});
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// SAVE FILE
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let saveButton = document.getElementById("save"); // This will let you save the results in your desktop through a button
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saveButton.addEventListener("click", () => {
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download("speech.html", localStorage.getItem("speech"));
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});
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function download(filename, text) {
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var element = document.createElement("a");
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element.setAttribute("href", "data:text/plain;charset=utf-8," + encodeURIComponent(text));
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element.setAttribute("download", filename);
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element.style.display = "none";
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document.body.appendChild(element);
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element.click();
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document.body.removeChild(element);
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}
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// START LISTENING
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startConverting(); // Finally, here is where the magic happen.
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function startConverting() {
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if ("webkitSpeechRecognition" in window) { // Declaring here the API
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let speechRecognizer = new webkitSpeechRecognition() || new SpeechRecognition();
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// And here the settings, like
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speechRecognizer.continuous = true; // if the recognition should continue or stop when you finish to talk
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speechRecognizer.interimResults = true; // if you want also get the interim results
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speechRecognizer.lang = "en-US"; // which language you want to recognize (!!)
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speechRecognizer.start(); // and then start :))
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finalTranscripts = "";
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// EVENTS
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// ON END
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speechRecognizer.onend = function () { // If the Speech-to-text stops to work, it will be notified in the console...
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console.log("Speech recognition service disconnected");
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speechRecognizer.start(); // and then restart itself
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};
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// ON SOUND START
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speechRecognizer.onsoundstart = function () { // When it starts the Speech-to-text, it will be notified in the console
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console.log("Some sound is being received");
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};
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// ON ERROR
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speechRecognizer.onerror = function (event) {};
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// ON RESULT
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speechRecognizer.onresult = function (event) { // Here is where the Speech-to-text show itself on the web page.
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interimTranscripts = "";
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for (let i = event.resultIndex; i < event.results.length; i++) {
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let transcript = event.results[i][0].transcript;
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// console.log(event.results[i][0]);
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transcript.replace("\n", "<br><br>");
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if (event.results[i].isFinal) {
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finalTranscripts += transcript;
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} else { // There are also shown the interim results and according to their "confidence" (the percentage of how much the word is correct) the color of each word could change
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interimTranscripts += transcript;
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allTheInterim += `<span style="opacity: ${
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event.results[i][0].confidence + 0.3
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}">${interimTranscripts}</span> `;
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}
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}
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process.innerHTML = allTheInterim;
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let final =
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finalTranscripts + '<span class="interim">' + interimTranscripts + "</span>";
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speech.innerHTML = final;
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textStorage = final;
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console.log(textStorage);
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localStorage.setItem("speech", final); // Here is where is stored the recognized text in the Local Storage
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};
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} else { // Unfortunately this API works only on Chrome...
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speech.innerHTML = "At the moment this works only in Chrome, sorry";
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}
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}
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// 2021, copyleft Kamome and Funix
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