--- a/webaudio/specification.html	Wed Jun 06 16:34:43 2012 -0700
+++ b/webaudio/specification.html	Fri Jun 08 12:57:11 2012 -0700
@@ -1471,8 +1471,13 @@
       the given time and lasting for the given duration. </p>
       <p>The <dfn id="dfn-time_5">time</dfn> parameter is the time in the same time coordinate system as AudioContext.currentTime.</p>
       <p>The <dfn id="dfn-duration_5">duration</dfn> parameter is the
-      time-constant value of first-order filter (exponential) approach to the
-      target value.</p>
+      amount of time in seconds (after the <em>time</em> parameter) where values will be calculated according to the <em>values</em> parameter..</p>
+      <p>
+      During the time interval: <em>time</em> <= t < <em>time</em> + <em>duration</em>, values will be calculated:
+      </p>
+      <p>
+      v(t) = values[N * (t - time) / duration], where <em>N</em> is the length of the <em>values</em> array.
+      </p>
     </dd>
 </dl>
 <dl>