diff --git a/README.md b/README.md
index 3f4a7a8..59d0401 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,10 @@ T("sin", {freq:880, mul:0.5}).play();
 MIT
 
 ## ChangeLog ##
+**14.11.25** (356.27KB)
+* Merge: [#33](https://github.com/mohayonao/timbre.js/pull/33) update of the note duration formula to handle more 3 dots
+* Merge: [#36](https://github.com/mohayonao/timbre.js/pull/36) use latest Web Audio API interfaces
+
 **14.10.12** (356.28KB)
 * Fixed: Decoding wav file
 * Fixed: Envelope release
diff --git a/package.json b/package.json
index 8e2500c..e052908 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "timbre",
-  "version": "14.10.12",
+  "version": "14.11.25",
   "description": "JavaScript library for objective sound programming",
   "author": "nao yonamine <mohayonao@gmail.com>",
   "repository": {
@@ -15,16 +15,16 @@
     }
   ],
   "dependencies": {
-    "readable-stream": "^1.0.33-1",
+    "readable-stream": "^1.0.33",
     "speaker": "^0.2.1"
   },
   "devDependencies": {
-    "chai": "^1.9.2",
+    "chai": "^1.10.0",
     "grunt": "^0.4.5",
     "grunt-contrib-clean": "^0.6.0",
     "grunt-contrib-jshint": "^0.10.0",
     "grunt-contrib-uglify": "^0.6.0",
     "grunt-contrib-watch": "^0.6.1",
-    "mocha": "^1.21.5"
+    "mocha": "^2.0.1"
   }
 }
diff --git a/src/core.js b/src/core.js
index 138d00e..7c71173 100644
--- a/src/core.js
+++ b/src/core.js
@@ -237,7 +237,7 @@
             }
             if ((m = /L(\d+)?(\.*)$/i.exec(str))) {
                 ms = 60 / getbpm(str) * (4 / (m[1]||4)) * 1000;
-                ms *= [1, 1.5, 1.75, 1.875][(m[2]||"").length] || 1;
+                ms *= 2 - (1 / Math.pow(2, (m[2]||"").length));
                 return ms;
             }
             if ((m = /^(\d+(?:\.\d+)?|\.(?:\d+))(min|sec|m)s?$/i.exec(str))) {
diff --git a/src/extras/webaudioapi.js b/src/extras/webaudioapi.js
index 0ecea89..6fb60d1 100644
--- a/src/extras/webaudioapi.js
+++ b/src/extras/webaudioapi.js
@@ -19,7 +19,7 @@
         _.bufferR = new fn.SignalArray(BUFFERSIZE << 2);
         _.buffermask = _.bufferL.length - 1;
         _.node   = null;
-        _.script = context.createJavaScriptNode(BUFFERSIZE, 2, 2);
+        _.script = context.createScriptProcessor(BUFFERSIZE, 2, 2);
         _.writeIndex = 0;
         _.readIndex  = 0;
         _.totalRead  = 0;
@@ -58,7 +58,7 @@
             var _ = this._;
             _.mode = "recv";
             _.script.onaudioprocess = make_recv_process(this);
-            _.gain = context.createGainNode();
+            _.gain = context.createGain();
             _.gain.gain.value = 0;
             _.script.connect(_.gain);
         }
diff --git a/src/objects/mediastream.js b/src/objects/mediastream.js
index 039d87d..b528731 100644
--- a/src/objects/mediastream.js
+++ b/src/objects/mediastream.js
@@ -91,9 +91,9 @@
         listen: function() {
             var _ = this._;
             var context = fn._audioContext;
-            _.gain = context.createGainNode();
+            _.gain = context.createGain();
             _.gain.gain.value = 0;
-            _.node = context.createJavaScriptNode(1024, 2, 2);
+            _.node = context.createScriptProcessorNode(1024, 2, 2);
             _.node.onaudioprocess = onaudioprocess(this);
             _.src.connect(_.node);
             _.node.connect(_.gain);
diff --git a/src/objects/mml.js b/src/objects/mml.js
index 0f867d9..b14ee34 100644
--- a/src/objects/mml.js
+++ b/src/objects/mml.js
@@ -268,7 +268,7 @@
                         dot = cmd.dot || status.dot;
                     }
                     duration = (60 / tempo) * (4 / len) * 1000;
-                    duration *= [1, 1.5, 1.75, 1.875][dot] || 1;
+                    duration *= 2 - (1 / Math.pow(2, dot));
 
                     vel = status.v << 3;
                     if (status.tie) {
@@ -315,7 +315,7 @@
                     }
                     if (len > 0) {
                         duration = (60 / tempo) * (4 / len) * 1000;
-                        duration *= [1, 1.5, 1.75, 1.875][dot] || 1;
+                        duration *= 2 - (1 / Math.pow(2, dot));
                         queueTime += duration;
                     }
                     break;
diff --git a/timbre.dev.js b/timbre.dev.js
index 92cb888..441c06b 100644
--- a/timbre.dev.js
+++ b/timbre.dev.js
@@ -18,7 +18,7 @@
     var ACCEPT_SAMPLERATES = [8000,11025,12000,16000,22050,24000,32000,44100,48000];
     var ACCEPT_CELLSIZES = [32,64,128,256];
 
-    var _ver = "14.10.12";
+    var _ver = "14.11.25";
     var _sys = null;
     var _constructors = {};
     var _factories    = {};
@@ -237,7 +237,7 @@
             }
             if ((m = /L(\d+)?(\.*)$/i.exec(str))) {
                 ms = 60 / getbpm(str) * (4 / (m[1]||4)) * 1000;
-                ms *= [1, 1.5, 1.75, 1.875][(m[2]||"").length] || 1;
+                ms *= 2 - (1 / Math.pow(2, (m[2]||"").length));
                 return ms;
             }
             if ((m = /^(\d+(?:\.\d+)?|\.(?:\d+))(min|sec|m)s?$/i.exec(str))) {
@@ -8209,9 +8209,9 @@
         listen: function() {
             var _ = this._;
             var context = fn._audioContext;
-            _.gain = context.createGainNode();
+            _.gain = context.createGain();
             _.gain.gain.value = 0;
-            _.node = context.createJavaScriptNode(1024, 2, 2);
+            _.node = context.createScriptProcessorNode(1024, 2, 2);
             _.node.onaudioprocess = onaudioprocess(this);
             _.src.connect(_.node);
             _.node.connect(_.gain);
@@ -8835,7 +8835,7 @@
                         dot = cmd.dot || status.dot;
                     }
                     duration = (60 / tempo) * (4 / len) * 1000;
-                    duration *= [1, 1.5, 1.75, 1.875][dot] || 1;
+                    duration *= 2 - (1 / Math.pow(2, dot));
 
                     vel = status.v << 3;
                     if (status.tie) {
@@ -8882,7 +8882,7 @@
                     }
                     if (len > 0) {
                         duration = (60 / tempo) * (4 / len) * 1000;
-                        duration *= [1, 1.5, 1.75, 1.875][dot] || 1;
+                        duration *= 2 - (1 / Math.pow(2, dot));
                         queueTime += duration;
                     }
                     break;