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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
<!-- END META TAG INFO -->
<!-- BEGIN TITLE -->
<title>SimplePlayThru</title>
<!-- END TITLE -->
<script language="JavaScript">
function JumpToNewPage() {
window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
<!-- BEGIN BODY OPEN -->
<body><a name="//apple_ref/doc/uid/DTS10003350" title="SimplePlayThru"></a>
<!--END BODY OPEN -->
<!-- START CENTER OPEN -->
<center>
<!-- END CENTER OPEN -->
<!-- BEGIN LOGO AND SEARCH -->
<!--#include virtual="/includes/adcnavbar"-->
<!-- END LOGO AND SEARCH -->
<!-- START BREADCRUMB -->
<div id="breadcrumb">
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<tr valign="middle">
<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/MusicAudio/index.html">Audio</a> > <a href="../../samplecode/MusicAudio/idxCoreAudio-date.html">Core Audio</a> >
</td>
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<tr>
<td colspan="2" scope="row"><img width="680" height="35" src="images/1dot.gif" alt=""></td>
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</div>
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<!-- START MAIN CONTENT -->
<!-- START TITLE GRAPHIC AND INTRO-->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">SimplePlayThru</div></h1></td>
</tr>
</table>
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<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td id="scdetails">
<p><strong>Version:</strong> 1.1</p>
<p><strong>Posted:</strong> 2006-10-25</p>
<p><strong>Build Requirements:</strong> XCode</p>
<p><strong>Runtime Requirements:</strong> 10.2 , QuickTime 6.5.1</p>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/main.m</option>
<option value="listing2.html">/SimplePlayThru.cpp</option>
<option value="listing3.html">/SimplePlayThru.h</option>
<option value="listing4.html">/SimplePlayThruController.h</option>
<option value="listing5.html">/SimplePlayThruController.mm</option></select>
</p>
</form>
<p><strong><a href="SimplePlayThru.zip">Download Sample</a></strong> (“SimplePlayThru.zip”, 69.4K)<BR>
<strong><a href="SimplePlayThru.dmg">Download Sample</a></strong> (“SimplePlayThru.dmg”, 120.8K)</p>
</td>
</tr>
<tr>
<td scope="row"><img width="680" height="10" src="images/1dot.gif" alt=""><br>
<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
<img width="680" height="20" src="images/1dot.gif" alt=""></td>
</tr>
<tr>
<td scope="row">
<h2>Description</h2>
<p>This sample shows how to use the HAL's Audio Output Unit (AUHAL) for device input and output. The code demonstrates how to use Audio Unit and Audio Unit Graph APIs to handle the 'simplest' case of device input and output. The 'simple case' case in this example is when there is a single audio device that has both input and output. Apple's Built-in Audio device is an example of a device with input and output. Please note that this sample does not implement play thru with different input and output devices where the case is much more complex.</p>
<h2>Document Revision History</h2>
<table cellspacing="0" class="graybox" width="680">
<tr>
<th width="100">Date</th>
<th width="580">Notes</th>
</tr>
<tr><td scope="row">2006-10-25</td><td>minor updates to description</td></tr>
<tr><td scope="row">2004-07-09</td><td>Minor change.</td></tr>
<tr><td scope="row">2004-06-25</td><td>Use the HAL's Audio Output Unit (AUHAL) for device input and output on a single device (play-thru)</td></tr>
</table>
</td>
</tr>
</table>
<!-- END WIDE COLUMN -->
<!-- END MAIN CONTENT -->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td><div style="width: 100%; height: 1px; background-color: #919699; margin-top: 5px; margin-bottom: 15px"></div></td>
</tr>
<tr>
<td align="center"><br/>
<table border="0" cellpadding="0" cellspacing="0" class="graybox">
<tr>
<th>Did this document help you?</th>
</tr>
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<td>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/SimplePlayThru/index.html%3Fid%3DDTS10003350-1.1&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=2&url=/samplecode/SimplePlayThru/index.html%3Fid%3DDTS10003350-1.1&media=dvd" target=_new>It’s good, but:</a> Report typos, inaccuracies, and so forth.</div>
<div><a href="http://developer.apple.com/feedback/?v=3&url=/samplecode/SimplePlayThru/index.html%3Fid%3DDTS10003350-1.1&media=dvd" target=_new>It wasn’t helpful</a>: Tell us what would have helped.</div>
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</table>
<!-- START BOTTOM APPLE NAVIGATION -->
<!--#include virtual="/includes/footer"-->
<!-- END BOTTOM APPLE NAVIGATION -->
<!-- START CENTER CLOSE -->
</center>
<!-- END CENTER CLOSE -->
</body>
</html>