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14<h1 align="left">axvpb.pb.coefSelect</h1>
15
16<h2>Syntax</h2>
17<dl><dd><pre class="construction">
18#define AX_PB_COEFSEL_8KHZ      0x0000  // roll off at 8KHz
19#define AX_PB_COEFSEL_12KHZ     0x0001  // roll off at 12.8KHz N64 type response
20#define AX_PB_COEFSEL_16KHZ     0x0002  // roll off at 16KHz
21
22u16 coefSelect;
23</pre></dd></dl>
24
25<h2>Description</h2>
26<p>The <SPAN class="argument">coefSelect</SPAN> parameter specifies the active filter coefficients when <code>srcSelect</code> is set to <code>AX_PB_POLYPHASE</code>. This parameter has no effect when other sample rate converters are used. Three sets of filter coefficients are provided, each with the frequency response indicated above. <BR><B>Note:</B> The slope for each filter is approximately -3dB/octave.</p>
27
28<p>The user must assert the <code>AX_SYNC_USER_SRCSELECT</code> synchronization flag in<code>axvpb.sync</code>, when setting a new <SPAN class="argument">coefSelect</SPAN> type.</p>
29
30<h2>See Also</h2>
31<p class="reference">
32<a href="../Voice_Parameter_Blocks/sync.html"><CODE>axvpb.sync</CODE></a>, <a href="srcselect.html"><CODE>axvpb.pb.srcSelect</CODE></a>, <a href="../Voice_Parameters/AXSetVoiceSrcType.html"><CODE>AXSetVoiceSrcType</CODE></a>
33</p>
34
35<h2>Revision History</h2>
36<P>
372006/03/01 Initial version.<br>
38</P>
39
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