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<h1>Bowed.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef STK_BOWED_H</span>
<a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define STK_BOWED_H</span>
<a name="l00003"></a>00003 <span class="preprocessor"></span>
<a name="l00004"></a>00004 <span class="preprocessor">#include "Instrmnt.h"</span>
<a name="l00005"></a>00005 <span class="preprocessor">#include "DelayL.h"</span>
<a name="l00006"></a>00006 <span class="preprocessor">#include "BowTable.h"</span>
<a name="l00007"></a>00007 <span class="preprocessor">#include "OnePole.h"</span>
<a name="l00008"></a>00008 <span class="preprocessor">#include "BiQuad.h"</span>
<a name="l00009"></a>00009 <span class="preprocessor">#include "SineWave.h"</span>
<a name="l00010"></a>00010 <span class="preprocessor">#include "ADSR.h"</span>
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <span class="keyword">namespace </span>stk {
<a name="l00013"></a>00013
<a name="l00014"></a>00014 <span class="comment">/***************************************************/</span>
<a name="l00035"></a>00035 <span class="comment">/***************************************************/</span>
<a name="l00036"></a>00036
<a name="l00037"></a><a class="code" href="classstk_1_1Bowed.html">00037</a> <span class="keyword">class </span><a class="code" href="classstk_1_1Bowed.html" title="STK bowed string instrument class.">Bowed</a> : <span class="keyword">public</span> <a class="code" href="classstk_1_1Instrmnt.html" title="STK instrument abstract base class.">Instrmnt</a>
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 <span class="keyword">public</span>:
<a name="l00041"></a>00041 <a class="code" href="classstk_1_1Bowed.html#b776c34c271de25c0cd036946d764158" title="Class constructor, taking the lowest desired playing frequency.">Bowed</a>( StkFloat lowestFrequency );
<a name="l00042"></a>00042
<a name="l00044"></a>00044 <a class="code" href="classstk_1_1Bowed.html#8067e4808bf7576922be4698f853c96c" title="Class destructor.">~Bowed</a>( <span class="keywordtype">void</span> );
<a name="l00045"></a>00045
<a name="l00047"></a>00047 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Bowed.html#8d522c36a35b86f90a06cf135fc83b11" title="Reset and clear all internal state.">clear</a>( <span class="keywordtype">void</span> );
<a name="l00048"></a>00048
<a name="l00050"></a>00050 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Bowed.html#02dbcfbd0766fee8a2e75a8df809e62c" title="Set instrument parameters for a particular frequency.">setFrequency</a>( StkFloat frequency );
<a name="l00051"></a>00051
<a name="l00053"></a>00053 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Bowed.html#7cf229e206a61259d381cf153a1c5096" title="Set vibrato gain.">setVibrato</a>( StkFloat gain );
<a name="l00054"></a>00054
<a name="l00056"></a>00056 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Bowed.html#519d511ddcc1cf23e897aeacdfe45020" title="Apply breath pressure to instrument with given amplitude and rate of increase.">startBowing</a>( StkFloat amplitude, StkFloat rate );
<a name="l00057"></a>00057
<a name="l00059"></a>00059 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Bowed.html#ae2a57d8e23536fd37a00af1fe07f21c" title="Decrease breath pressure with given rate of decrease.">stopBowing</a>( StkFloat rate );
<a name="l00060"></a>00060
<a name="l00062"></a>00062 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Bowed.html#4ebaf6bd27d90975e7b0aea0ee727dc1" title="Start a note with the given frequency and amplitude.">noteOn</a>( StkFloat frequency, StkFloat amplitude );
<a name="l00063"></a>00063
<a name="l00065"></a>00065 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Bowed.html#b86db568328b51e4adfae8b62987fc85" title="Stop a note with the given amplitude (speed of decay).">noteOff</a>( StkFloat amplitude );
<a name="l00066"></a>00066
<a name="l00068"></a>00068 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Bowed.html#d066af9bb1340b6fcf9002d6922021f4" title="Perform the control change specified by number and value (0.0 - 128.0).">controlChange</a>( <span class="keywordtype">int</span> number, StkFloat value );
<a name="l00069"></a>00069
<a name="l00071"></a>00071 StkFloat <a class="code" href="classstk_1_1Bowed.html#4d583369f0b22335fff8cee3ce6f2750" title="Compute and return one output sample.">tick</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> channel = 0 );
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="keyword">protected</span>:
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <a class="code" href="classstk_1_1DelayL.html" title="STK linear interpolating delay line class.">DelayL</a> neckDelay_;
<a name="l00076"></a>00076 <a class="code" href="classstk_1_1DelayL.html" title="STK linear interpolating delay line class.">DelayL</a> bridgeDelay_;
<a name="l00077"></a>00077 <a class="code" href="classstk_1_1BowTable.html" title="STK bowed string table class.">BowTable</a> bowTable_;
<a name="l00078"></a>00078 <a class="code" href="classstk_1_1OnePole.html" title="STK one-pole filter class.">OnePole</a> stringFilter_;
<a name="l00079"></a>00079 <a class="code" href="classstk_1_1BiQuad.html" title="STK biquad (two-pole, two-zero) filter class.">BiQuad</a> bodyFilter_;
<a name="l00080"></a>00080 <a class="code" href="classstk_1_1SineWave.html" title="STK sinusoid oscillator class.">SineWave</a> vibrato_;
<a name="l00081"></a>00081 <a class="code" href="classstk_1_1ADSR.html" title="STK ADSR envelope class.">ADSR</a> adsr_;
<a name="l00082"></a>00082 StkFloat maxVelocity_;
<a name="l00083"></a>00083 StkFloat baseDelay_;
<a name="l00084"></a>00084 StkFloat vibratoGain_;
<a name="l00085"></a>00085 StkFloat betaRatio_;
<a name="l00086"></a>00086
<a name="l00087"></a>00087 };
<a name="l00088"></a>00088
<a name="l00089"></a><a class="code" href="classstk_1_1Bowed.html#4d583369f0b22335fff8cee3ce6f2750">00089</a> <span class="keyword">inline</span> StkFloat <a class="code" href="classstk_1_1Bowed.html#4d583369f0b22335fff8cee3ce6f2750" title="Compute and return one output sample.">Bowed :: tick</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> )
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 StkFloat bowVelocity = maxVelocity_ * adsr_.<a class="code" href="classstk_1_1ADSR.html#f2c0869f86210a55f4f668172373c975" title="Compute and return one output sample.">tick</a>();
<a name="l00092"></a>00092 StkFloat bridgeRefl = -stringFilter_.<a class="code" href="classstk_1_1OnePole.html#3c83b6d43f76bec06f11caa9de76881e" title="Input one sample to the filter and return one output.">tick</a>( bridgeDelay_.<a class="code" href="classstk_1_1DelayL.html#16810ca38fab79276bb8ec51447623a9" title="Return the last computed output value.">lastOut</a>() );
<a name="l00093"></a>00093 StkFloat nutRefl = -neckDelay_.<a class="code" href="classstk_1_1DelayL.html#16810ca38fab79276bb8ec51447623a9" title="Return the last computed output value.">lastOut</a>();
<a name="l00094"></a>00094 StkFloat stringVel = bridgeRefl + nutRefl; <span class="comment">// Sum is string velocity</span>
<a name="l00095"></a>00095 StkFloat velDiff = bowVelocity - stringVel; <span class="comment">// Differential velocity</span>
<a name="l00096"></a>00096 StkFloat newVel = velDiff * bowTable_.<a class="code" href="classstk_1_1BowTable.html#8dc58c69ecda1471dce6d142cb5f4b19" title="Take one sample input and map to one sample of output.">tick</a>( velDiff ); <span class="comment">// Non-Linear bow function</span>
<a name="l00097"></a>00097 neckDelay_.<a class="code" href="classstk_1_1DelayL.html#1d01bbaf40cc20a0b70241bb8072da7f" title="Input one sample to the filter and return one output.">tick</a>(bridgeRefl + newVel); <span class="comment">// Do string propagations</span>
<a name="l00098"></a>00098 bridgeDelay_.<a class="code" href="classstk_1_1DelayL.html#1d01bbaf40cc20a0b70241bb8072da7f" title="Input one sample to the filter and return one output.">tick</a>(nutRefl + newVel);
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keywordflow">if</span> ( vibratoGain_ &gt; 0.0 ) {
<a name="l00101"></a>00101 neckDelay_.<a class="code" href="classstk_1_1DelayL.html#80dd30628502a7c3b37ff045176eb91f" title="Set the delay-line length.">setDelay</a>( (baseDelay_ * (1.0 - betaRatio_) ) +
<a name="l00102"></a>00102 (baseDelay_ * vibratoGain_ * vibrato_.<a class="code" href="classstk_1_1SineWave.html#31a55627bf8064919b5e063059260eda" title="Compute and return one output sample.">tick</a>()) );
<a name="l00103"></a>00103 }
<a name="l00104"></a>00104
<a name="l00105"></a>00105 lastFrame_[0] = bodyFilter_.<a class="code" href="classstk_1_1BiQuad.html#648086962c3cddcaa09c46a002c3e635" title="Input one sample to the filter and return a reference to one output.">tick</a>( bridgeDelay_.<a class="code" href="classstk_1_1DelayL.html#16810ca38fab79276bb8ec51447623a9" title="Return the last computed output value.">lastOut</a>() );
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="keywordflow">return</span> lastFrame_[0];
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00110"></a>00110 } <span class="comment">// stk namespace</span>
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="preprocessor">#endif</span>
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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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