--- a/webaudio/specification.html	Tue Apr 30 12:02:26 2013 -0700
+++ b/webaudio/specification.html	Wed May 01 12:36:48 2013 -0700
@@ -1418,22 +1418,25 @@
 </dl>
 <dl>
   <dt id="dfn-channelCount"><code>channelCount</code><dt>
-    <dd><p>The number of channels for the node.  The default value is 2.</p>
+    <dd><p>The number of channels used when up-mixing and down-mixing connections to any inputs to the node.  The default value is 2
+       except for specific nodes where its value is specially determined.
+       This attribute has no effect for nodes with no inputs.</p>
       <p>See the <a href="#UpMix-section">Channel up-mixing and down-mixing</a>
         section for more information on this attribute.</p>
     </dd>
 </dl>
 <dl>
   <dt id="dfn-channelCountMode"><code>channelCountMode</code><dt>
-    <dd><p>Determines how the channel count used for up-mixing and down-mixing
-      is computed.</p>
+    <dd><p>Determines how channels will be counted when up-mixing and down-mixing connections to any inputs to the node
+      .  This attribute has no effect for nodes with no inputs.</p>
       <p>See the <a href="#UpMix-section">Channel up-mixing and down-mixing</a>
         section for more information on this attribute.</p>
     </dd>
 </dl>
 <dl>
   <dt id="dfn-channelInterpretation"><code>channelInterpretation</code><dt>
-    <dd><p>Determines how individual channels will be treated.</p>
+    <dd><p>Determines how individual channels will be treated when up-mixing and down-mixing connections to any inputs to the node.
+    This attribute has no effect for nodes with no inputs.</p>
       <p>See the <a href="#UpMix-section">Channel up-mixing and down-mixing</a>
         section for more information on this attribute.</p>
     </dd>