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-<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
-<html>
-<head>
- <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
- <meta name="GENERATOR" content="Mozilla/4.79 [en] (Windows NT 5.0; U) [Netscape]">
- <meta name="Author" content="Phil Burk">
- <meta name="Description" content="Tutorial for PortAudio, a cross platform, open-source, audio I/O library.It provides a very simple API for recording and/or playing sound using a simple callback function.">
- <meta name="KeyWords" content="audio, tutorial, library, portable, open-source, DirectSound,sound, music, JSyn, synthesis,">
- <title>PortAudio Tutorial</title>
-</head>
-<body>
-&nbsp;
-<center><table COLS=1 WIDTH="100%" BGCOLOR="#FADA7A" >
-<tr>
-<td>
-<center>
-<h1>
-PortAudio Tutorial</h1></center>
-</td>
-</tr>
-</table></center>
-
-<h2>
-Opening a Stream using Defaults</h2>
-
-<blockquote>The next step is to open a stream which is similar to opening
-a file. You can specify whether you want audio input and/or output, how
-many channels, the data format, sample rate, etc.
-<p>First declare a variable to receive the stream pointer:
-<blockquote>
-<pre>PortAudioStream&nbsp;&nbsp; *stream;</pre>
-</blockquote>
-There are two calls for opening streams, <tt>Pa_OpenStream</tt>() and <tt>Pa_OpenDefaultStream</tt>().
-P<tt>a_OpenStream()</tt> takes extra&nbsp; parameters which give you more
-control. You can normally just use <tt>Pa_OpenDefaultStream</tt>() which
-just calls <tt>Pa_OpenStream()</tt> <tt>with</tt> some reasonable default
-values.&nbsp; Let's open a stream for stereo output, using floating point
-data, at 44100 Hz.
-<blockquote>
-<pre>err = Pa_OpenDefaultStream(
-&nbsp;&nbsp;&nbsp; &amp;stream,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* passes back stream pointer */
-&nbsp;&nbsp;&nbsp; 0,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* no input channels */
-&nbsp;&nbsp;&nbsp; 2,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* stereo output */
-&nbsp;&nbsp;&nbsp; paFloat32,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* 32 bit floating point output */
-&nbsp;&nbsp;&nbsp; 44100,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* sample rate */
-&nbsp;&nbsp;&nbsp; 256,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* frames per buffer */
-&nbsp;&nbsp;&nbsp; 0,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* number of buffers, if zero then use default minimum */
-&nbsp;&nbsp;&nbsp; patestCallback, /* specify our custom callback */
-&nbsp;&nbsp;&nbsp; &amp;data );&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* pass our data through to callback */</pre>
-</blockquote>
-If you want to use 16 bit integer data, pass <tt>paInt16</tt> instead of
-<tt>paFloat32</tt>.</blockquote>
-<font size=+2><a href="http://www.portaudio.com/">home</a> | <a href="pa_tutorial.html">contents</a>
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