1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html> 3 4<head> 5<META http-equiv="Content-Type" content="text/html; charset=windows-1252"> 6<META name="GENERATOR" content="Microsoft FrontPage 5.0"> 7<META http-equiv="Content-Style-Type" content="text/css"> 8<LINK rel="stylesheet" type="text/css" href="../../CSS/revolution.css"> 9<title>AX Compressor Demo</title> 10</head> 11 12<body> 13 14<h1 align="left">compressor</h1> 15 16 17 18<h2>Description</h2> 19<P>This demo illustrates the use of the AX compressor.</P> 20<P>Each test plays a low-frequency hum, then repeatedly plays a sound effect to induce clipping. Your application may toggle the compressor on and off and compare the incidence of clipping artifacts.</P> 21<P>Each test also provides a "clip detector," which displays an alert whenever clipping is detected on the right or left output channels of the DSP.</P> 22<P>Individual sound effects may also be started and stopped manually from the main menu.</P> 23<P><B>Note:</B> This demo lets your application toggle the compressor at will. However, you should change the state of the compressor only when audio is silent to prevent clicking or popping artifacts.</P> 24<h2>Coverage</h2> 25<UL> 26<LI>AX initialization. 27<LI>Acquiring and freeing voices. 28<LI>Handling "dropped" voices. 29<LI>Toggling the AX compressor. 30<LI>Managing sample data with the AX Sound Pipeline. 31<LI>Snooping the output of the DSP using the DEMO library (for the clip detectors). 32</UL> 33<h2>Operation Method</h2> 34<P>In the "AX Compressor Demo" window:</P> 35<UL> 36<LI>Use the +Control Pad or Control Stick to move the menu selection up and down. 37<LI>Use the A Button to select and toggle a menu item. 38</UL> 39<P>In the "Compressor Test" windows:</P> 40<UL> 41<LI>Use the A Button to toggle the compressor. 42<LI>Use the B Button to exit. 43</UL> 44<h2>Required Data Files</h2> 45 46<ul TYPE="DISC"> 47<li><FONT face="Courier New">//axdemo/compressor/comp_sp.spd</FONT></li> 48<li><FONT face="Courier New">//axdemo/compressor/comp_sp.spt</FONT></li> 49</ul> 50<H2>Revision History</H2> 51<P>2006/03/01 Initial version.</P> 52<hr> 53<P>CONFIDENTIAL</p> 54</BODY> 55</HTML>