symbian-qemu-0.9.1-12/libsdl-trunk/docs/html/sdlmixaudio.html
author Mike Kinghan <mikek@symbian.org>
Thu, 25 Nov 2010 14:28:39 +0000
branchGCC_SURGE
changeset 135 10852f1a0ae9
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Merge a pointless head that got away.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<HTML
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><HEAD
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><TITLE
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>SDL_MixAudio</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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"><LINK
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REL="HOME"
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TITLE="SDL Library Documentation"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Audio"
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HREF="audio.html"><LINK
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REL="PREVIOUS"
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TITLE="SDL_ConvertAudio"
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HREF="sdlconvertaudio.html"><LINK
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REL="NEXT"
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TITLE="SDL_LockAudio"
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HREF="sdllockaudio.html"></HEAD
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><BODY
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CLASS="REFENTRY"
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BGCOLOR="#FFF8DC"
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TEXT="#000000"
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LINK="#0000ee"
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VLINK="#551a8b"
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ALINK="#ff0000"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>SDL Library Documentation</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="sdlconvertaudio.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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></TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="sdllockaudio.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><H1
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><A
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NAME="SDLMIXAUDIO"
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></A
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>SDL_MixAudio</H1
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><DIV
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CLASS="REFNAMEDIV"
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><A
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NAME="AEN7107"
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></A
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><H2
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>Name</H2
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>SDL_MixAudio&nbsp;--&nbsp;Mix audio data</DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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><A
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NAME="AEN7110"
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></A
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><H2
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>Synopsis</H2
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><DIV
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CLASS="FUNCSYNOPSIS"
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><A
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NAME="AEN7111"
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></A
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><P
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></P
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><PRE
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CLASS="FUNCSYNOPSISINFO"
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>#include "SDL.h"</PRE
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><P
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><CODE
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><CODE
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CLASS="FUNCDEF"
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>void <B
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CLASS="FSFUNC"
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>SDL_MixAudio</B
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></CODE
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>(Uint8 *dst, Uint8 *src, Uint32 len, int volume);</CODE
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></P
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><P
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></P
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></DIV
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN7117"
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></A
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><H2
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>Description</H2
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><P
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>This function takes two audio buffers of <TT
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CLASS="PARAMETER"
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><I
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>len</I
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></TT
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> bytes each
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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of the playing audio format and mixes them, performing addition, volume
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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adjustment, and overflow clipping. The <TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="PARAMETER"
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><I
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>volume</I
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></TT
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> ranges
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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from 0 to <TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="LITERAL"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>SDL_MIX_MAXVOLUME</TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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> and should be set to the maximum
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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value for full audio volume. Note this does not change hardware volume. This is
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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provided for convenience -- you can mix your own audio data.</P
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><DIV
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CLASS="NOTE"
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><BLOCKQUOTE
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CLASS="NOTE"
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><P
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><B
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Note: </B
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Do not use this function for mixing together more than two streams of sample
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data. The output from repeated application of this function may be distorted
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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by clipping, because there is no accumulator with greater range than the
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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input (not to mention this being an inefficient way of doing it).
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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Use mixing functions from SDL_mixer, OpenAL, or write your own mixer instead.</P
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></BLOCKQUOTE
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></DIV
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></DIV
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><DIV
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="REFSECT1"
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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NAME="AEN7125"
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></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><H2
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>See Also</H2
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><P
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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HREF="sdlopenaudio.html"
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><TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="FUNCTION"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>SDL_OpenAudio</TT
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></A
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></P
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></DIV
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><DIV
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="NAVFOOTER"
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><HR
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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ALIGN="LEFT"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="100%"><TABLE
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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SUMMARY="Footer navigation table"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="100%"
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BORDER="0"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CELLPADDING="0"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CELLSPACING="0"
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><TR
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><TD
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WIDTH="33%"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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ALIGN="left"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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VALIGN="top"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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HREF="sdlconvertaudio.html"
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ACCESSKEY="P"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Prev</A
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></TD
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><TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="34%"
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ALIGN="center"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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VALIGN="top"
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   198
HREF="index.html"
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ACCESSKEY="H"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Home</A
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></TD
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><TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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HREF="sdllockaudio.html"
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ACCESSKEY="N"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Next</A
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></TD
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></TR
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><TR
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><TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="33%"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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ALIGN="left"
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VALIGN="top"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>SDL_ConvertAudio</TD
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><TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="34%"
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   220
ALIGN="center"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   221
VALIGN="top"
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   223
HREF="audio.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   224
ACCESSKEY="U"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Up</A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   231
>SDL_LockAudio</TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>