Extended write hooks and debugged sound

web/esop-web-app.js

@@ -2,7 +2,7 @@
 
 function main() {
   var devCfg = { 
-    audio: window.audioContext || window.webkitAudioContext,
+    audio: null,
     canvas: document.getElementById('C') //JS-specific implementation canvas DOM reference
   }
 
@@ -13,6 +13,7 @@ function main() {
       rdr.onload = function() {
         var vm = UxnCore()
         var ext = ESOPExtensions()
+        devCfg.audio = new (window.AudioContext || window.webkitAudioContext)
         vm.boot()
         ext.setup(vm, devCfg)
         vm.load(new Uint8Array(rdr.result))