google chrome - Toggle Live Input Not Working Javascript -

i have toggleliveinput() function, , here's problem:

i run code, , works fine on desktop. when build app (with intel xdk in case wondering), works long you've launched app once. first time, ignore function. won't it. see why? thanks!

function toggleliveinput() {     getusermedia(         {             "audio": {                 "mandatory": {                     "googechocancellation": "false",                     "googautogaincontrol": "false",                     "goognoisesuppression": "false",                     "googhighpassfilter": "false"                 },                 "optional": []             },         }, gotstream); } function gotstream(stream) {     // create audionode stream.     mediastreamsource = audiocontext.createmediastreamsource(stream);      // connect destination.     analyser = audiocontext.createanalyser();     analyser.fftsize = 2048;     mediastreamsource.connect( analyser );     updatepitch();     meter = createaudiometer(audiocontext);     mediastreamsource.connect(meter);     drawloop(); } function drawloop( time ) {     rafid = window.requestanimationframe( drawloop );     volumeofnote = meter.volume; } toggleliveinput(); 

edit: figured out strange. used try() catch(e) , no error found. means function being igonred. 1 time? strange...