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7    <title>SetTrackVolume</title>
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10    <h1>nw::snd::StreamSoundHandle::SetTrackVolume Member Function</h1>
11    <h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">#include &lt;nw/snd/snd_StreamSoundHandle.h&gt;
14
15void SetTrackVolume(
16     <span>u32</span> trackBitFlag,
17     <span>f32</span> volume,
18     int frames = 0
19);
20</pre>
21    </div>
22    <h2>Arguments</h2>
23    <div class="section">
24      <table class="arguments">
25        <thead>
26          <tr>
27            <td width="15" />
28            <th>Name</th>
29            <td>Description</td>
30          </tr>
31        </thead>
32        <tr>
33          <td>in</td>
34          <th>trackBitFlag</th>
35          <td>Bit flag for each track.</td>
36        </tr>
37        <tr>
38          <td>in</td>
39          <th>volume</th>
40          <td>Volume change ratio.</td>
41        </tr>
42        <tr>
43          <td>in</td>
44          <th>frames</th>
45          <td>Number of frames used for volume change.</td>
46        </tr> </table>
47    </div>
48    <h2>Return Values</h2>
49    <div class="section">
50                None.
51               </div>
52    <h2>Description</h2>
53    <div class="section">
54      <p>Changes the volume of streaming sound tracks.</p><p>Changes the volume of streaming tracks in the sound associated with the handle. If the handle is invalid, the function does nothing.</p><p>The value specified by this function operates independently of other volume parameters, which are mixed together.</p><p>The trackBitFlag argument specifies the track. Tracks are identified from the lower bit in sequence; for example, Track 0, Track 1, Track 2 and so on. The silent status will change for all tracks with enabled bits. For example, to change the silent status of Track 2 and Track 5, use  (1 &lt;&lt; 2) | (1 &lt;&lt; 5); i.e., 0x0024.</p><p>The <span>volume</span> argument specifies a ratio of 0.0 or greater. There is no effect on the volume if 1.0 is specified. If 0.0 is specified, no sound is output. The default value is 1.0.</p><p><B>Note:</B> After being combined with the other volume parameters, the final volume is clamped to the range of 0.0 to 2.0. Twice the original volume may not result even if a value of 2.0 is set with this function.</p></div>
55    <h2>Revision History</h2>
56    <div class="section">
57      <dl class="history">
58        <dt>2010/01/22</dt>
59        <dd>Initial version.<br />
60        </dd>
61      </dl>
62    </div>
63  <hr><p>CONFIDENTIAL</p></body>
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