Get Web Audio to work with ios safari

gistfile1.txt

 <script>
              $(document).ready(function(){
                console.log("Lang: <%= I18n.locale %>");
                <% if I18n.locale.to_s == 'en' %>
                  let url = "https:<%= @sight.sound_guide_en.url %>;"
                <% else %>
                  let url = "https:<%= @sight.sound_guide.url %>;"
                <% end %>
                let source;
                window.AudioContext = window.AudioContext || window.webkitAudioContext;
                let context;

                $('.play-sound').on('click', function(e) {
                  e.preventDefault();
                  $(this).find('.play').toggleClass('pause');

                  if (context && context.state === 'running') {
                    stopTunes();
                    //console.log("Stopping..");
                    //console.log("Context ", context.state);
                  } else if(context && context.state === 'suspended') {
                    //console.log("Resume play");
                    resumeTunes();
                  } else {
                    //console.log("Start new");
                    context = new AudioContext();
                    var request = new XMLHttpRequest();
                    request.open("GET", url, true);
                    request.responseType = "arraybuffer";
                    request.onload = function() {
                      var Data = request.response;
                      process(Data, context);
                    };
                    request.send();
                  }
                  if (context) {
                    //console.log("STATE: ", context.state);
                  }
                })

                function process(Data, context) {
                  source = context.createBufferSource(); // Create Sound Source
                  context.decodeAudioData(Data, function(buffer) {
                    source.buffer = buffer;
                    source.connect(context.destination);
                    source.start(context.currentTime);
                  });
                }
                function stopTunes() {
                  context.suspend();
                }
                function resumeTunes() {
                  context.resume();
                }
              });
            </script>