Using currentStep to narrate steps of multiple sequence in Vuforia Studio

Hi @Aditya1702 ,

because the most calls are asyncronous therefore is it better to use directy the step number which is passed to the stepstarted event:

//==================================
$scope.app.playAudio = function (mp3) {
 var audio = new Audio(mp3);
 audio.addEventListener('ended', function() {
 console.warn("mp3="+mp3+" finished!")
 console.warn("call the next audio from the list");
 }, false);
 //let wdgName = 'label-3'
 //let volume =parseFloat($scope.view.wdg[wdgName].text)
 //audio.volume = volume;
 audio.volume = 0.76;
 audio.play();
}; 
//
//==================================
$scope.$on('stepstarted', function(evt, arg1, arg2, arg3) { 
 var parsedArg3 = JSON.parse(arg3);
// console.warn(evt); console.warn(arg1);console.warn(arg2);console.warn(arg3);

 
 
 console.log("stepName="+parsedArg3.stepName);
 console.log("stepDescription="+parsedArg3.stepDescription);
 console.log("nextStep="+parsedArg3.nextStep);
 
 $scope.stepDescription=parsedArg3.stepDescription;
 console.warn("Event: " + evt.name + " arg3 fields, name: " + parsedArg3.stepName + " duration(ms): " + parsedArg3.duration + " total steps: " + parsedArg3.totalSteps + " step desc: " + parsedArg3.stepDescription );
 
 $scope.app.playAudio('app/resources/Uploaded/seq_step_'+parsedArg3.stepNumber+'.mp3');
}); 

so according the voice type this is not part of Studio but the js library what is availible on HL need to check which langues 

e.g.  https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisVoice

https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisVoice/name

example there:

for (const voice of voices) {
 const option = document.createElement("option");
 option.textContent = `${voice.name} (${voice.lang})`;

 if (voice.default) {
 option.textContent += " — DEFAULT";
 }

 option.setAttribute("data-lang", voice.lang);
 option.setAttribute("data-name", voice.name);
 voiceSelect.appendChild(option);
}

I never used on HoloLens2 - tested in IOS

$scope.app.speak1 = function (msg_txt)
{
 console.log('$scope.app.speak('+ msg_txt+ ')')
 

try { 
 
var msg = new SpeechSynthesisUtterance();
var voices = window.speechSynthesis.getVoices();
var found=0
//this is only for debugging purpuse
 for(i = 0; i < voices.length ; i++) {
 
 console.log("voices["+i+"] ="+ voices[i].name + ' (' + voices[i].lang + ')');
 
 if(voices[i].default) {
 console.log( 'the last voice is -- DEFAULT');
 }
 
 if(voices[i].name.inculdes('en-US')) {found= i; break;}
 }
msg.voice = voices[found]; // Note: some voices don't support altering params
//msg.voiceURI = 'native';
msg.volume = 1; // 0 to 1
msg.rate = 1; // 0.1 to 10
msg.pitch = 1; //0 to 2
msg.text = msg_txt;
//msg.lang = 'en-US';

msg.onend = function(e) {
 console.log('Finished in ' + event.elapsedTime + ' seconds.');
};
msg.onerror = function(event) {
 console.log('An error has occurred with the speech synthesis: ' + event.error);
}
 
 window.speechSynthesis.speak(msg);
 
 
} catch (e_attempt2) {console.error("error on attempt2 :"+e_attempt2)}
 
}
/////////

So far I remeber the voices are different on different platforms so you need first to test with different parameters which will lead to the best resutls. The code above was only a test code where I wanted to check this functionality.