diff --git a/src/droplets/ad_droplet.cpp b/src/droplets/ad_droplet.cpp
index 4350a02..8861470 100644
--- a/src/droplets/ad_droplet.cpp
+++ b/src/droplets/ad_droplet.cpp
@@ -114,7 +114,10 @@ ADDroplet::ADDroplet(DaisyPatch* m_patch,
 	       sample_rate,
 	       &m_state);
   }
+  CreateTitleGraph();
+}
 
+void ADDroplet::CreateTitleGraph() {
   title_graph = new Graph(GetScreenMax()-GetScreenMin(),
 			  GetTitleHeight());
 }
@@ -212,6 +215,5 @@ void ADDroplet::UpdateStateCallback() {
 	       State());
   }
   delete title_graph;
-  title_graph = new Graph(GetScreenMax()-GetScreenMin(),
-			  GetTitleHeight());
+  CreateTitleGraph();
 }
diff --git a/src/droplets/ad_droplet.h b/src/droplets/ad_droplet.h
index e085f87..0bf7d96 100644
--- a/src/droplets/ad_droplet.h
+++ b/src/droplets/ad_droplet.h
@@ -28,19 +28,77 @@ private:
   DropletState* state;
   
 public:
+  /*
+   * Contructor for attach decay envelope.
+   *
+   * @param m_patch pointer to patch
+   * @param sample_rate audio sample rate
+   * @param state droplet position
+   */
   void Init(DaisyPatch* m_patch,
 	    float sample_rate,
 	    DropletState* state);
 
-  void Process(DacHandle::Channel chn, DaisyPatch::GateInput gate);
+  /*
+   * Precesses input from the trigger gate
+   * and sends envelope data to a given CV output.
+   *
+   * @param chn
+   * @param gate
+   */
+  void Process(DacHandle::Channel chn,
+	       DaisyPatch::GateInput gate);
 
+  /*
+   * Returns the envelope signal level.
+   *
+   * @return envelope signal level
+   */
   float GetSignal();
+
+  /*
+   * Returns the envelope attack time.
+   *
+   * @return envelope attack time
+   */
   float GetAttack();
+
+  /*
+   * Returns the envelope decay time.
+   *
+   * @return envelope decay time
+   */
   float GetDecay();
+
+  /*
+   * Returns the envelope slope shape.
+   *
+   * @return envelope slope shape
+   */
   float GetCurve();
+
+  /*
+   * Returns the envelope amp level.
+   *
+   * @return envelope amp level
+   */
   float GetAmp();
+
+  /*
+   * Returns the envelope menu state.
+   *
+   * @return envelope menu state
+   */
   bool GetMenu();
+
+  /*
+   * Toggles envelope menu state.
+   */
   void ToggleCurve();
+
+  /*
+   * Binds envelope to menu hardware controls.
+   */
   void SetControls();
 };
 
@@ -50,12 +108,18 @@ private:
   float sample_rate;
   Graph* title_graph;
 
+  /*
+   * Create a new graph for the title bar.
+   */
+  void CreateTitleGraph();
+
 public:
   /*
    * Constructor for a AD droplet.
    *
    * @param m_patch pointer to patch
    * @param m_state droplet position
+   * @param sample_rate audio sample rate
    */
   ADDroplet(DaisyPatch* m_patch,
 	    DropletState m_state,