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<!-- This file create by Bob L. Sturm Sept 02 2003, using vi. Originally inspired by the MATLAB Auditory Demonstrations package created by Univ. of Sheffield, UK.--><HTML><HEAD> <TITLE>SSUM: Additive Synthesis Waveform Explorer</TITLE> <link href="style.css" rel="stylesheet" type="text/css"></HEAD><BODY><table cellpadding=0 cellspacing=0 align=center border=0 width="100%"><tr> <td> <IMG SRC="wavexpo_t.jpg" WIDTH=137 HEIGHT=146 > </td> <td align=center> <H1>Additive Synthesis Waveform Explorer</H1> </td></tr><tr> <td colspan=2 align=center bgcolor=black> <H6><A HREF="#introduction">Introduction</A> <A HREF="#demonstration">Demo</A> <A HREF="#investigate">Investigate</A> <A HREF="#reading">Reading</A> <A HREF="#credits">Credits</A> <A HREF="SSUM.htm">Home</A></H6> </td></tr></table><br><A NAME="introduction"></A><H2>Introduction</H2><P>This is a demonstration of how adding together sinewaves in just theright way can produce any waveform imaginable! Here though you are onlyable to modify fifteen sinewaves. </p><br><A NAME="demonstration"></A><H2>The tool</H2><p>Some pre-made waveforms can be selected by choosing a fundamental frequency(f0) and a waveform from the menu. You can modify any of the settings. Youcan also send the signal to the <a href="fourierexpo.htm">FourierExplorer</a>, or the <a href="sonoexpo.htm">Sonogram Explorer</a> to look atits spectrum.</p><br><CENTER><a href="wavexpo.jpg"><IMG SRC="wavexpo.jpg" width=735 height=457></a></CENTER><br><A NAME="investigate"></A><H2>Things to investigate</H2><p> <OL> <LI>Make f0 = 440 Hz, choose a square wave, and listen. Now "randomize"the phases and listen. What happened and why? Does it look like a square wave? <LI>Make f0 = 440 Hz, choose a square wave, and listen to the pitch and singthe note. Now make a0 = 0, listen, and sing. Do you still hear the same pitch?</OL></p><A NAME="reading"></A><H2>Further reading</H2><br><A NAME="credits"></a><H2>Credits</H2><br><hr noshade><P class="credits">Produced by Bob L. Sturm and Dr. Jerry Gibson.<br>Release date: June 12, 2003<br>Copyright 2003 University of California, Santa Barbara</p></BODY></HTML>⌨️ 快捷键说明
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