minor editorial changes, as reported by Fantasai.

Author: danielweck

css3-speech/Overview.html

@@ -479,8 +479,9 @@ <h2 id=mixing-props><span class=secno>4. </span>Mixing properties:
     href="#non-negative-number-def">positive number</a> in the range
     &lsquo;<code class=css>0</code>&rsquo; to &lsquo;<code
     class=css>100</code>&rsquo;. &lsquo;<code class=css>0</code>&rsquo;
-    represents silence (the <em>minimum</em> level), and 100 corresponds to
-    the <em>maximum</em> level. The volume scale is linear amplitude.
+    represents silence (the <em>minimum</em> level), and &lsquo;<code
+    class=css>100</code>&rsquo; corresponds to the <em>maximum</em> level.
+    The volume scale is linear amplitude.
 
    <dt><strong>&lt;percentage&gt;</strong>
 
@@ -587,10 +588,9 @@ <h2 id=mixing-props><span class=secno>4. </span>Mixing properties:
     &lsquo;<code class=css>-100</code>&rsquo; and &lsquo;<code
     class=css>100</code>&rsquo;. For &lsquo;<code
     class=css>-100</code>&rsquo; only the left channel is audible. Simarly
-    for &lsquo;<code class=css>100</code>&rsquo; or &lsquo;<code
-    class=css>+100</code>&rsquo; only the right channel is audible. For
-    &lsquo;<code class=css>0</code>&rsquo; both channels have the same level,
-    so that the speech appears to be coming from the center.
+    for &lsquo;<code class=css>100</code>&rsquo; only the right channel is
+    audible. For &lsquo;<code class=css>0</code>&rsquo; both channels have
+    the same level, so that the speech appears to be coming from the center.
 
    <dt><strong>left</strong>
 
@@ -602,8 +602,7 @@ <h2 id=mixing-props><span class=secno>4. </span>Mixing properties:
 
    <dt><strong>right</strong>
 
-   <dd>Same as &lsquo;<code class=css>100</code>&rsquo; or &lsquo;<code
-    class=css>+100</code>&rsquo;.
+   <dd>Same as &lsquo;<code class=css>100</code>&rsquo;.
 
    <dt><strong>leftwards</strong>
 
@@ -624,10 +623,13 @@ <h2 id=mixing-props><span class=secno>4. </span>Mixing properties:
     class=css>100</code>&rsquo;.
   </dl>
 
-  <p>Many speech synthesizers only support a single channel. The &lsquo;<a
+  <p class=note> Note that many speech synthesizers only generate mono sound,
+   and therefore do not intrinsically support the &lsquo;<a
    href="#voice-balance"><code class=property>voice-balance</code></a>&rsquo;
-   property can then be treated as part of a post synthesis mixing step. This
-   is where speech is mixed with other audio sources.</p>
+   property. The distribution of audio signals between left and right
+   channels would consequently occur at post-synthesis stage, for example
+   when a speech-enabled user-agent mixes the various audio sources that may
+   be authored within the document.</p>
   <!-- p>Unlike 'voice-volume', 'voice-balance'
 <em>does</em> apply to <a href="#cue-props">audio cues</a>.</p -->
 

css3-speech/Overview.src.html

@@ -314,7 +314,7 @@ <h2 id="mixing-props"><span class="secno">4. </span>Mixing properties:
 <dt><strong>&lt;non-negative number&gt;</strong></dt>
 
 <dd>An integer or floating point <a href="#non-negative-number-def">positive number</a> in the range '0' to '100'.
-'0' represents silence (the <em>minimum</em> level), and 100
+'0' represents silence (the <em>minimum</em> level), and '100'
 corresponds to the <em>maximum</em> level. The volume scale is
 linear amplitude.
 </dd>
@@ -409,10 +409,8 @@ <h2 id="mixing-props"><span class="secno">4. </span>Mixing properties:
 <dt><strong>&lt;number&gt;</strong></dt>
 
 <dd>An integer or floating point <a href="#number-def">number</a> between '-100' and '100'.
-For '-100' only the left channel is audible. Simarly for '100' or
-'+100' only the right channel is audible. For '0' both channels
-have the same level, so that the speech appears to be coming from
-the center.</dd>
+For '-100' only the left channel is audible. Simarly for '100' only the right channel is audible.
+For '0' both channels have the same level, so that the speech appears to be coming from the center.</dd>
 
 <dt><strong>left</strong></dt>
 
@@ -424,7 +422,7 @@ <h2 id="mixing-props"><span class="secno">4. </span>Mixing properties:
 
 <dt><strong>right</strong></dt>
 
-<dd>Same as '100' or '+100'.</dd>
+<dd>Same as '100'.</dd>
 
 <dt><strong>leftwards</strong></dt>
 
@@ -439,11 +437,15 @@ <h2 id="mixing-props"><span class="secno">4. </span>Mixing properties:
 the resulting value to the range '-100' and '100'.</dd>
 </dl>
 
-<p>Many speech synthesizers only support a single channel. The
-'voice-balance' property can then be treated as part of a post
-synthesis mixing step. This is where speech is mixed with other
-audio sources.
+<p class="note">
+Note that many speech synthesizers only generate mono sound,
+and therefore do not intrinsically support the 'voice-balance' property.
+The distribution of audio signals between left and right channels
+would consequently occur at post-synthesis stage, for example when a
+speech-enabled user-agent mixes the various audio sources that
+may be authored within the document.
 </p>
+
 <!-- p>Unlike 'voice-volume', 'voice-balance'
 <em>does</em> apply to <a href="#cue-props">audio cues</a>.</p -->