Audio antrian tertimpa dgn panggilan sebelumnya yg belum selesai

Assalamualaikum Warahmatullahi Wabarakatuh...
 
ane mau tanya soal code d bwah ini kira kira salahnya di mana ya gan ?
kondisi sekarang audionya tidak menyelesaikan panggilan yang berjalan , jadi kalau ada panggilan baru audionya langsung merespon panggilan berikutnya, yang seharusnya panggilan harus di slesaikan dulu kemudian lanjut ke pemanggilan berikutnya,
mohon bantuannya gan :)
 
   <script type="text/javascript" src="{{ asset('assets/js/voice.min.js') }}"></script>
    <script>
        $(function() {
            $('#main').css({'min-height': $(window).height()-114+'px'});
        });
        $(window).resize(function() {
            $('#main').css({'min-height': $(window).height()-114+'px'});
        });
 
 
        (function($){
            $.extend({
                playSound: function(){
                  return $("<embed src='"+arguments[0]+".mp3' hidden='true' autostart='true' loop='false' class='playSound'>" + "<audio autoplay='autoplay' style='display:none;' controls='controls'><source src='"+arguments[0]+".mp3' /><source src='"+arguments[0]+".ogg' /></audio>").appendTo('body');
 
 
                }
            });
        })(jQuery);
 
        function checkcall() {
            $.ajax({
                type: "GET",
                url: "{{ url('assets/files/display') }}",
                cache: false,
                success: function(response) {
                    s = JSON.parse(response);
                    if (curl!=s[0].call_id) {
                        $("#callarea").fadeOut(function(){
                            $('#num0').html(s[0].number);
                            $("#cou0").html(s[0].counter);
                            $('#num1').html(s[1].number);
                            $("#cou1").html(s[1].counter);
                            $('#num2').html(s[2].number);
                            $("#cou2").html(s[2].counter);
                            $('#num3').html(s[3].number);
                            $("#cou3").html(s[3].counter);
                        });
                        $("#callarea").fadeIn();
                        if (curl!=0) {
                            var bleep = new Audio();
                            bleep.src = '{{ url('assets/sound/sound1.mp3') }}';
                            bleep.play();
 
                            window.setTimeout(function() {
                                msg1 = '{!! trans('messages.display.token') !!} '+s[0].call_number+' {!! trans('messages.display.please') !!} {!! trans('messages.display.proceed_to') !!} '+s[0].counter;
                                responsiveVoice.speak(msg1, "{{ $settings->language->display }}", {rate: 0.85});
                            }, 800);
 
                        }
                        curl = s[0].call_id;
                    }
                }
            });
        }
 
        window.setInterval(function() {
            checkcall();
        }, 3000);
 
        $(document).ready(function() {
            $.ajax({
                type: "GET",
                url: "{{ url('assets/files/display') }}",
                cache: false,
                success: function(response) {
                    s = JSON.parse(response);
                    curl = s[0].call_id;
                }
            });
            checkcall();
        });
    </script>