diff --git a/webaudio/specification.html b/webaudio/specification.html
--- a/webaudio/specification.html
+++ b/webaudio/specification.html
@@ -909,25 +909,25 @@ interface <dfn id="dfn-AudioContext">Aud
 </dl>
 </div>
 
 <div id="methodsandparams-AudioContext-section" class="section">
 <h3 id="methodsandparams-AudioContext">4.1.2. Methods and Parameters</h3>
 <dl>
   <dt id="dfn-createBuffer">The <code>createBuffer</code> method</dt>
     <dd><p>Creates an AudioBuffer of the given size. The audio data in the
-      buffer will be zero-initialized (silent).  An exception will be thrown if
+      buffer will be zero-initialized (silent).  An INDEX_SIZE_ERR exception MUST be thrown if
       the <code>numberOfChannels</code> or <code>sampleRate</code> are out-of-bounds.</p>
       <p>The <dfn id="dfn-numberOfChannels">numberOfChannels</dfn> parameter
       determines how many channels the buffer will have.  An implementation must support at least 32 channels. </p>
       <p>The <dfn id="dfn-length">length</dfn> parameter determines the size of
       the buffer in sample-frames. </p>
       <p>The <dfn id="dfn-sampleRate_2">sampleRate</dfn> parameter describes
       the sample-rate of the linear PCM audio data in the buffer in
-      sample-frames per second.  An implementation must support sample-rates in at least the range 22050 to 96000.</p>
+      sample-frames per second.  An implementation MUST support sample-rates in at least the range 8000 to 192000.</p>
     </dd>
 </dl>
 <dl>
   <dt id="dfn-createBuffer_2">The <code>createBuffer</code> from ArrayBuffer
   method</dt>
     <dd><p>Creates an AudioBuffer given the audio file data contained in the
       ArrayBuffer. The ArrayBuffer can, for example, be loaded from an XMLHttpRequest's
         <code>response</code> attribute after setting the <code>responseType</code> to "arraybuffer".