<!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/4.73 [en]C-gatewaynet (Win98; 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> <center><table COLS=1 WIDTH="100%" BGCOLOR="#FADA7A" > <tr> <td> <center> <h1> PortAudio Tutorial</h1></center> </td> </tr> </table></center> <h2> Initializing PortAudio</h2> <blockquote>Before making any other calls to PortAudio, you must call <tt>Pa_Initialize</tt>(). This will trigger a scan of available devices which can be queried later. Like most PA functions, it will return a result of type <tt>paError</tt>. If the result is not <tt>paNoError</tt>, then an error has occurred. <blockquote> <pre>err = Pa_Initialize(); if( err != paNoError ) goto error;</pre> </blockquote> You can get a text message that explains the error message by passing it to <blockquote> <pre>printf( "PortAudio error: %s\n", Pa_GetErrorText( err ) );</pre> </blockquote> </blockquote> <font size=+2><a href="http://www.portaudio.com/">home</a> | <a href="pa_tutorial.html">contents</a> | <a href="pa_tut_callback.html">previous</a> | <a href="pa_tut_open.html">next</a></font> </body> </html>