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<HTML>
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<TITLE>The Synthesis ToolKit in C++ (STK)</TITLE>
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<div class="navpath"><a class="el" href="namespacestk.html">stk</a>::<a class="el" href="classstk_1_1Resonate.html">Resonate</a>
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<h1>stk::Resonate Class Reference</h1><!-- doxytag: class="stk::Resonate" --><!-- doxytag: inherits="stk::Instrmnt" -->
<p>STK noise driven formant filter.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="Resonate_8h_source.html">Resonate.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for stk::Resonate:</div>
<div class="dynsection">
<div class="center">
<img src="classstk_1_1Resonate.png" usemap="#stk::Resonate_map" alt=""/>
<map id="stk::Resonate_map" name="stk::Resonate_map">
<area href="classstk_1_1Instrmnt.html" alt="stk::Instrmnt" shape="rect" coords="0,56,85,80"/>
<area href="classstk_1_1Stk.html" alt="stk::Stk" shape="rect" coords="0,0,85,24"/>
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</div>
<p><a href="classstk_1_1Resonate-members.html">List of all members.</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab273b41ec296f776a41cfa66bb1e430e"></a><!-- doxytag: member="stk::Resonate::Resonate" ref="ab273b41ec296f776a41cfa66bb1e430e" args="(void)" -->
</td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#ab273b41ec296f776a41cfa66bb1e430e">Resonate</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Class constructor. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a634ab2db8eabad147fa90fb1bf72a580"></a><!-- doxytag: member="stk::Resonate::~Resonate" ref="a634ab2db8eabad147fa90fb1bf72a580" args="(void)" -->
</td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#a634ab2db8eabad147fa90fb1bf72a580">~Resonate</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Class destructor. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a534740efbbde171d790309e85c96017d"></a><!-- doxytag: member="stk::Resonate::clear" ref="a534740efbbde171d790309e85c96017d" args="(void)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#a534740efbbde171d790309e85c96017d">clear</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Reset and clear all internal state. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a8767e6c05862c183483776ac4cf354f9"></a><!-- doxytag: member="stk::Resonate::setResonance" ref="a8767e6c05862c183483776ac4cf354f9" args="(StkFloat frequency, StkFloat radius)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#a8767e6c05862c183483776ac4cf354f9">setResonance</a> (StkFloat frequency, StkFloat radius)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the filter for a resonance at the given frequency (Hz) and radius. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad4476301fba545cbbfc773150ca6901d"></a><!-- doxytag: member="stk::Resonate::setNotch" ref="ad4476301fba545cbbfc773150ca6901d" args="(StkFloat frequency, StkFloat radius)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#ad4476301fba545cbbfc773150ca6901d">setNotch</a> (StkFloat frequency, StkFloat radius)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the filter for a notch at the given frequency (Hz) and radius. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad8000ad734634ac7334f4fab09a13a7e"></a><!-- doxytag: member="stk::Resonate::setEqualGainZeroes" ref="ad8000ad734634ac7334f4fab09a13a7e" args="(void)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#ad8000ad734634ac7334f4fab09a13a7e">setEqualGainZeroes</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the filter zero coefficients for contant resonance gain. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="afebf784a302eb0043b4a453b0d1d852c"></a><!-- doxytag: member="stk::Resonate::keyOn" ref="afebf784a302eb0043b4a453b0d1d852c" args="(void)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#afebf784a302eb0043b4a453b0d1d852c">keyOn</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Initiate the envelope with a key-on event. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0008e1fdd7611b769b72b52c8bfb1e6a"></a><!-- doxytag: member="stk::Resonate::keyOff" ref="a0008e1fdd7611b769b72b52c8bfb1e6a" args="(void)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#a0008e1fdd7611b769b72b52c8bfb1e6a">keyOff</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Signal a key-off event to the envelope. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a76bfadc70f4163f9767e7864d322d144"></a><!-- doxytag: member="stk::Resonate::noteOn" ref="a76bfadc70f4163f9767e7864d322d144" args="(StkFloat frequency, StkFloat amplitude)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#a76bfadc70f4163f9767e7864d322d144">noteOn</a> (StkFloat frequency, StkFloat amplitude)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Start a note with the given frequency and amplitude. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0454a8e9d6ef3a2394b6c348edf0195f"></a><!-- doxytag: member="stk::Resonate::noteOff" ref="a0454a8e9d6ef3a2394b6c348edf0195f" args="(StkFloat amplitude)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#a0454a8e9d6ef3a2394b6c348edf0195f">noteOff</a> (StkFloat amplitude)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Stop a note with the given amplitude (speed of decay). <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af55feabf25f1f6f996c32574656ffd68"></a><!-- doxytag: member="stk::Resonate::controlChange" ref="af55feabf25f1f6f996c32574656ffd68" args="(int number, StkFloat value)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#af55feabf25f1f6f996c32574656ffd68">controlChange</a> (int number, StkFloat value)</td></tr>
<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/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab917279f4f57d5d305481426e9bffd98"></a><!-- doxytag: member="stk::Resonate::tick" ref="ab917279f4f57d5d305481426e9bffd98" args="(unsigned int channel=0)" -->
StkFloat </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#ab917279f4f57d5d305481426e9bffd98">tick</a> (unsigned int channel=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compute and return one output sample. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1Resonate.html#aeefb870c1eeb430160fdca374e8324b3">tick</a> (<a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> &frames, unsigned int channel=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Fill a channel of the <a class="el" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a> object with computed outputs. <a href="#aeefb870c1eeb430160fdca374e8324b3"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>STK noise driven formant filter. </p>
<p>This instrument contains a noise source, which excites a biquad resonance filter, with volume controlled by an <a class="el" href="classstk_1_1ADSR.html" title="STK ADSR envelope class.">ADSR</a>.</p>
<p>Control Change Numbers:</p>
<ul>
<li>Resonance Frequency (0-Nyquist) = 2</li>
<li>Pole Radii = 4</li>
<li>Notch Frequency (0-Nyquist) = 11</li>
<li>Zero Radii = 1</li>
<li><a class="el" href="classstk_1_1Envelope.html" title="STK linear line envelope class.">Envelope</a> Gain = 128</li>
</ul>
<p>by Perry R. Cook and Gary P. Scavone, 1995-2012. </p>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="aeefb870c1eeb430160fdca374e8324b3"></a><!-- doxytag: member="stk::Resonate::tick" ref="aeefb870c1eeb430160fdca374e8324b3" args="(StkFrames &frames, unsigned int channel=0)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & stk::Resonate::tick </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & </td>
<td class="paramname"> <em>frames</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>channel</em> = <code>0</code></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [inline, virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Fill a channel of the <a class="el" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a> object with computed outputs. </p>
<p>The <code>channel</code> argument must be less than the number of channels in the <a class="el" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a> argument (the first channel is specified by 0). However, range checking is only performed if _STK_DEBUG_ is defined during compilation, in which case an out-of-range value will trigger an <a class="el" href="classstk_1_1StkError.html" title="STK error handling class.">StkError</a> exception. </p>
<p>Implements <a class="el" href="classstk_1_1Instrmnt.html#a34c6733ca145763462d9e44ae3c772b6">stk::Instrmnt</a>.</p>
<p><div class="fragment"><pre class="fragment"><a name="l00099"></a>00099 {
<a name="l00100"></a>00100 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nChannels = lastFrame_.channels();
<a name="l00101"></a>00101 <span class="preprocessor">#if defined(_STK_DEBUG_)</span>
<a name="l00102"></a>00102 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( channel > frames.channels() - nChannels ) {
<a name="l00103"></a>00103 oStream_ << <span class="stringliteral">"Resonate::tick(): channel and StkFrames arguments are incompatible!"</span>;
<a name="l00104"></a>00104 <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff" title="Static function for error reporting and handling using c-strings.">handleError</a>( StkError::FUNCTION_ARGUMENT );
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106 <span class="preprocessor">#endif</span>
<a name="l00107"></a>00107 <span class="preprocessor"></span>
<a name="l00108"></a>00108 StkFloat *samples = &frames[channel];
<a name="l00109"></a>00109 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> j, hop = frames.channels() - nChannels;
<a name="l00110"></a>00110 <span class="keywordflow">if</span> ( nChannels == 1 ) {
<a name="l00111"></a>00111 <span class="keywordflow">for</span> ( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<frames.frames(); i++, samples += hop )
<a name="l00112"></a>00112 *samples++ = <a class="code" href="classstk_1_1Resonate.html#ab917279f4f57d5d305481426e9bffd98" title="Compute and return one output sample.">tick</a>();
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114 <span class="keywordflow">else</span> {
<a name="l00115"></a>00115 <span class="keywordflow">for</span> ( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<frames.frames(); i++, samples += hop ) {
<a name="l00116"></a>00116 *samples++ = <a class="code" href="classstk_1_1Resonate.html#ab917279f4f57d5d305481426e9bffd98" title="Compute and return one output sample.">tick</a>();
<a name="l00117"></a>00117 <span class="keywordflow">for</span> ( j=1; j<nChannels; j++ )
<a name="l00118"></a>00118 *samples++ = lastFrame_[j];
<a name="l00119"></a>00119 }
<a name="l00120"></a>00120 }
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="keywordflow">return</span> frames;
<a name="l00123"></a>00123 }
</pre></div></p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="Resonate_8h_source.html">Resonate.h</a></li>
</ul>
</div>
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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>
<tr><td>©1995-2012 Perry R. Cook and Gary P. Scavone. All Rights Reserved.</td></tr>
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