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5		<title>SNDEXIirFilterParam</title>
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9		<H1>SNDEXIirFilterParam <IMG src="../../image/TWL.gif" width="24" height="12" border="0" align=middle></H1>
10
11		<H2>Definition</H2>
12		<DL>
13			<DD><CODE>#include &lt;twl/snd.h&gt;</CODE></DD>
14			<DD><PRE><CODE>typedef struct _SNDEXIirFilterParam
15{
16    u16 n0;
17    u16 n1;
18    u16 n2;
19    u16 d1;
20    u16 d2;
21} SNDEXIirFilterParam;</CODE></PRE></DD>
22		</DL>
23
24		<H2>Elements</H2>
25		<TABLE>
26			<TBODY>
27				<TR>
28					<TH width="25%">n0, n1, n2, d1, d2</TH>
29					<TD width="75%">Coefficients that compose an IIR filter (0 &ndash; 65,535).</TD>
30				</TR>
31			</TBODY>
32		</TABLE>
33
34		<H2>Description</H2>
35		<P>
36			A structure that is a collection of parameters used to set IIR filters.
37        </P>
38        <P>
39            You can use the parameters (<B>Hex</B>-type values) calculated with the <A href="doc/aboutIirFilterBuilder.html">IIR_FilterBuilder</A> unchanged.
40            (However, when using <B>Values</B>-type values, you must type-cast them to <CODE>u16</CODE>.)
41        </P>
42        <P>
43			The initial values for these parameters, for each filter that can be specified by the <A href="SNDEXIirFilterTarget.html"><CODE>SNDEXIirFilterTarget</CODE></A> structure, are as follows.<PRE><CODE>n0 = 0x7FFF(32767), n1 = n2 = d1 = d2 = 0</CODE></PRE>
44		</P>
45		<P>
46			Even if you have configured parameters for the various filters, resetting them to the values above will restore the initial filter state.
47		</P>
48		<H2>See Also</H2>
49		<P>
50			<CODE>
51				<A href="SNDEX_SetIirFilter.html">SNDEX_SetIirFilter</A>, <A href="SNDEX_SetIirFilterAsync.html">SNDEX_SetIirFilterAsync</A></CODE>
52		</P>
53
54		<H2>Revision History</H2>
55		<P>
56            2008/09/10 Added a link to <A href="doc/aboutIirFilterBuilder.html">IIR_FilterBuilder</A>.<BR>
57			2008/07/08 Initial version.
58		</P>
59	<hr><p>CONFIDENTIAL</p></body>
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