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13<H1 align="left">AXFX_DELAY/AXFX_DELAY_DPL2</H1>
14
15<H2>C Specification</H2>
16<BLOCKQUOTE>
17<PRE><CODE>
18#include &lt;revolution.h&gt;
19#include &lt;revolution/axfx.h&gt;
20
21/*----------------------------------------------*
22  For mono, stereo, surround
23 *----------------------------------------------*/
24
25typedef struct AXFX_DELAY
26{
27    // do not touch these!
28    s32       *line[3];
29
30        (omitted)
31
32    u32        active;
33
34    // user parameters
35    u32        delay[3];       // Delay buffer length in ms per channel
36    u32        feedback[3];    // Feedback volume in % per channel
37    u32        output[3];      // Output volume in % per channel
38
39} AXFX_DELAY;
40
41/*----------------------------------------------*
42  For Dolby Pro Logic II
43 *----------------------------------------------*/
44
45typedef struct AXFX_DELAY_DPL2
46{
47    // do not touch these!
48    s32       *line[4];
49
50        (omitted)
51
52    u32        active;
53
54    // user parameters
55    u32        delay[4];       // Delay buffer length in ms per channel
56    u32        feedback[4];    // Feedback volume in % per channel
57    u32        output[4];      // Output volume in % per channel
58
59} AXFX_DELAY_DPL2;
60</CODE></PRE>
61</BLOCKQUOTE>
62
63<H2>Description</H2>
64<P>When using Delay, you must assign appropriate values to the following parameters of the <code>AXFX_DELAY</CODE> or <CODE>AXFX_DELAY_DPL2</code> structure. Normally, the <code>AXFX_DELAY</code> structure is used, while the <code>AXFX_DELAY_DPL2</code> structure is used with Dolby Pro Logic II.</P>
65
66<table border="1" >
67  <tbody>
68	<tr>
69	  <td width="120" align="center" bgcolor="#ffffe8"><CODE><STRONG><EM>delay</EM></STRONG></CODE></td>
70<td width="480">Length of the delay line (=delay time of input audio). Specify a value greater than 0 (units of msec).</td>
71	</tr>
72	<tr>
73	  <td width="120" align="center" bgcolor="#ffffe8"><CODE><STRONG><EM>feedback</EM></STRONG></CODE></td>
74<td width="480">Feedback gain. Specify a value in percent (%) such that <EM>value</EM> &lt; 100.</td>
75	</tr>
76	<tr>
77	  <td width="120" align="center" bgcolor="#ffffe8"><CODE><STRONG><EM>output</EM></STRONG></CODE></td>
78<td width="480">Output gain. Specify a value in percent (%) such that <EM>value</EM> &lt;= 100.</td>
79	</tr>
80  </tbody>
81</table>
82
83<p><strong>Note:</strong> All the various parameters must be set for each channel, in the channel order (Left) -&gt; (Right) -&gt; (Surround). For Dolby Pro Logic II, the order is (Left Front) -&gt; (Right Front) -&gt; (Left Rear) -&gt; (Right Rear).</p>
84
85<H2>Revision History</H2>
86<P>
872007/08/06 Initial version.<br>
88</P>
89
90<hr><p>CONFIDENTIAL</p></body>
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