clarification on SSML volume

Author: danielweck

css3-speech/Overview.html

@@ -88,14 +88,14 @@
 
    <h1 id=top>CSS Speech Module</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 13 February
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 14 February
     2012</h2>
 
    <dl id=versions>
     <dt>This version:
 
     <dd>
-     <!--<a href="http://www.w3.org/TR/2012/WD-css3-speech-20120213/">http://www.w3.org/TR/2012/ED-css3-speech-20120213/</a>-->
+     <!--<a href="http://www.w3.org/TR/2012/WD-css3-speech-20120214/">http://www.w3.org/TR/2012/ED-css3-speech-20120214/</a>-->
      <a
      href="http://dev.w3.org/csswg/css3-speech">http://dev.w3.org/csswg/css3-speech</a>
 
@@ -592,11 +592,14 @@ <h3 id=mixing-props-voice-volume><span class=secno>7.1. </span>The
    href="#cue-props">audio cues</a> within the <a href="#aural-model">audio
    "box" model</a>.
 
-  <p class=note> Note that the functionality provided by this property is
-   related to the <a
+  <p class=note> Note that although the functionality provided by this
+   property is similar to the <a
    href="http://www.w3.org/TR/speech-synthesis11/#edef_prosody"><code>volume</code>
    attribute of the <code>prosody</code> element</a> from the SSML markup
-   language <a href="#SSML" rel=biblioentry>[SSML]<!--{{!SSML}}--></a>.
+   language <a href="#SSML" rel=biblioentry>[SSML]<!--{{!SSML}}--></a>, there
+   are notable discrepancies. For example, CSS Speech volume keywords and
+   decibels units are not mutually-exclusive, due to how values are inherited
+   and combined for selected elements.
 
   <dl><!-- dt>
         <strong>normal</strong>

css3-speech/Overview.src.html

@@ -326,9 +326,12 @@ <h3 id="mixing-props-voice-volume">The 'voice-volume' property</h3>
     <p>The 'voice-volume' property allows authors to control the amplitude of the audio waveform
       generated by the speech synthesiser, and is also used to adjust the relative volume level of
         <a href="#cue-props">audio cues</a> within the <a href="#aural-model">audio "box" model</a>. </p>
-    <p class="note"> Note that the functionality provided by this property is related to the <a
-        href="http://www.w3.org/TR/speech-synthesis11/#edef_prosody"><code>volume</code> attribute
-        of the <code>prosody</code> element</a> from the SSML markup language [[!SSML]]. </p>
+    <p class="note"> Note that although the functionality provided by this property is similar to
+      the <a href="http://www.w3.org/TR/speech-synthesis11/#edef_prosody"><code>volume</code>
+        attribute of the <code>prosody</code> element</a> from the SSML markup language [[!SSML]],
+      there are notable discrepancies. For example, CSS Speech volume keywords and decibels units
+      are not mutually-exclusive, due to how values are inherited and combined for selected
+      elements. </p>
     <dl>
       <!-- dt>
         <strong>normal</strong>