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<TITLE>The Synthesis ToolKit in C++ (STK)</TITLE>
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<a class="qindex" href="index.html">Home</a> <a class="qindex" href="information.html">Information</a> <a class="qindex" href="classes.html">Classes</a> <a class="qindex" href="download.html">Download</a> <a class="qindex" href="usage.html">Usage</a> <a class="qindex" href="maillist.html">Mail List</a> <a class="qindex" href="system.html">Requirements</a> <a class="qindex" href="links.html">Links</a> <a class="qindex" href="tutorial.html">Tutorial</a></CENTER>
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<!-- Generated by Doxygen 1.3.4 -->
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<h1>StifKarp Class Reference</h1><code>#include <<a class="el" href="StifKarp_8h-source.html">StifKarp.h</a>></code>
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<p>
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<p>Inheritance diagram for StifKarp:
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<p><center><img src="classStifKarp.png" usemap="#StifKarp_map" border="0" alt=""></center>
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<map name="StifKarp_map">
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<area href="classInstrmnt.html" alt="Instrmnt" shape="rect" coords="0,56,57,80">
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<area href="classStk.html" alt="Stk" shape="rect" coords="0,0,57,24">
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</map>
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<a href="classStifKarp-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
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STK plucked stiff string instrument.
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<p>
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This class implements a simple plucked string algorithm (Karplus Strong) with enhancements (Jaffe-Smith, Smith, and others), including string stiffness and pluck position controls. The stiffness is modeled with allpass filters.<p>
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This is a digital waveguide model, making its use possibly subject to patents held by Stanford University, Yamaha, and others.<p>
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Control Change Numbers:<ul>
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<li>Pickup Position = 4</li><li>String Sustain = 11</li><li>String Stretch = 1</li></ul>
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<p>
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by Perry R. Cook and Gary P. Scavone, 1995 - 2004.
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<p>
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Definition at line <a class="el" href="StifKarp_8h-source.html#l00034">34</a> of file <a class="el" href="StifKarp_8h-source.html">StifKarp.h</a>.<table border=0 cellpadding=0 cellspacing=0>
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<tr><td></td></tr>
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<tr><td colspan=2><br><h2>Public Member Functions</h2></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a0" doxytag="StifKarp::StifKarp" ></a>
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</td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a0">StifKarp</a> (StkFloat lowestFrequency)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Class constructor, taking the lowest desired playing frequency. <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a1" doxytag="StifKarp::~StifKarp" ></a>
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</td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a1">~StifKarp</a> ()</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Class destructor. <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a2" doxytag="StifKarp::clear" ></a>
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void </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a2">clear</a> ()</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Reset and clear all internal state. <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a3" doxytag="StifKarp::setFrequency" ></a>
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void </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a3">setFrequency</a> (StkFloat frequency)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Set instrument parameters for a particular frequency. <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a4" doxytag="StifKarp::setStretch" ></a>
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void </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a4">setStretch</a> (StkFloat stretch)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the stretch "factor" of the string (0.0 - 1.0). <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a5" doxytag="StifKarp::setPickupPosition" ></a>
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void </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a5">setPickupPosition</a> (StkFloat position)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the pluck or "excitation" position along the string (0.0 - 1.0). <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top>void </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a6">setBaseLoopGain</a> (StkFloat aGain)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the base loop gain. </em> <a href="#a6"></a><em><br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a7" doxytag="StifKarp::pluck" ></a>
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void </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a7">pluck</a> (StkFloat amplitude)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Pluck the string with the given amplitude using the current frequency. <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a8" doxytag="StifKarp::noteOn" ></a>
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void </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a8">noteOn</a> (StkFloat frequency, StkFloat amplitude)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Start a note with the given frequency and amplitude. <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a9" doxytag="StifKarp::noteOff" ></a>
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void </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a9">noteOff</a> (StkFloat amplitude)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Stop a note with the given amplitude (speed of decay). <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a10" doxytag="StifKarp::tick" ></a>
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StkFloat </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a10">tick</a> ()</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Compute one output sample. <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a11" doxytag="StifKarp::tick" ></a>
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StkFloat * </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a11">tick</a> (StkFloat *vector, unsigned int vectorSize)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Computer <em>vectorSize</em> outputs and return them in <em>vector</em>. <br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="classStkFrames.html">StkFrames</a> & </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a12">tick</a> (<a class="el" href="classStkFrames.html">StkFrames</a> &frames, unsigned int channel=1)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Fill a channel of the <a class="el" href="classStkFrames.html">StkFrames</a> object with computed outputs. </em> <a href="#a12"></a><em><br><br></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="a13" doxytag="StifKarp::controlChange" ></a>
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void </td><td class="memItemRight" valign=bottom><a class="el" href="classStifKarp.html#a13">controlChange</a> (int number, StkFloat value)</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Perform the control change specified by <em>number</em> and <em>value</em> (0.0 - 128.0). <br><br></td></tr>
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</table>
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<hr><h2>Member Function Documentation</h2>
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<a class="anchor" name="a6" doxytag="StifKarp::setBaseLoopGain" ></a><p>
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<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
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<tr>
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<td class="mdRow">
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<table cellpadding="0" cellspacing="0" border="0">
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<tr>
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<td class="md" nowrap valign="top"> void StifKarp::setBaseLoopGain </td>
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<td class="md" valign="top">( </td>
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<td class="md" nowrap valign="top">StkFloat </td>
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<td class="mdname1" valign="top" nowrap> <em>aGain</em> </td>
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<td class="md" valign="top"> ) </td>
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<td class="md" nowrap></td>
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</table>
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</td>
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</table>
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<table cellspacing=5 cellpadding=0 border=0>
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<tr>
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<td>
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</td>
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<td>
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<p>
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Set the base loop gain.
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<p>
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The actual loop gain is set according to the frequency. Because of high-frequency loop filter roll-off, higher frequency settings have greater loop gains. </td>
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</tr>
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</table>
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<a class="anchor" name="a12" doxytag="StifKarp::tick" ></a><p>
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<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
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<tr>
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<td class="mdRow">
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<table cellpadding="0" cellspacing="0" border="0">
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<tr>
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<td class="md" nowrap valign="top"> <a class="el" href="classStkFrames.html">StkFrames</a>& StifKarp::tick </td>
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<td class="md" valign="top">( </td>
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<td class="md" nowrap valign="top"><a class="el" href="classStkFrames.html">StkFrames</a> & </td>
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<td class="mdname" nowrap> <em>frames</em>, </td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td class="md" nowrap>unsigned int </td>
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<td class="mdname" nowrap> <em>channel</em> = 1</td>
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</tr>
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<tr>
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<td></td>
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<td class="md">) </td>
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<td class="md" colspan="2"><code> [virtual]</code></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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<table cellspacing=5 cellpadding=0 border=0>
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<tr>
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<td>
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</td>
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<td>
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<p>
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Fill a channel of the <a class="el" href="classStkFrames.html">StkFrames</a> object with computed outputs.
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<p>
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The <code>channel</code> argument should be one or greater (the first channel is specified by 1). An <a class="el" href="classStkError.html">StkError</a> will be thrown if the <code>channel</code> argument is zero or it is greater than the number of channels in the <a class="el" href="classStkFrames.html">StkFrames</a> object.
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<p>
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Reimplemented from <a class="el" href="classInstrmnt.html#a10">Instrmnt</a>. </td>
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</tr>
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</table>
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<hr>The documentation for this class was generated from the following file:<ul>
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<li><a class="el" href="StifKarp_8h-source.html">StifKarp.h</a></ul>
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<HR>
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<table>
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<tr><td><A HREF="http://ccrma.stanford.edu/software/stk/"><I>The Synthesis ToolKit in C++ (STK)</I></A></td></tr>
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<tr><td>©1995-2004 Perry R. Cook and Gary P. Scavone. All Rights Reserved.</td></tr>
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</table>
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