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<h1>Brass.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef STK_BRASS_H</span>
<a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define STK_BRASS_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 "DelayA.h"</span>
<a name="l00006"></a>00006 <span class="preprocessor">#include "BiQuad.h"</span>
<a name="l00007"></a>00007 <span class="preprocessor">#include "PoleZero.h"</span>
<a name="l00008"></a>00008 <span class="preprocessor">#include "ADSR.h"</span>
<a name="l00009"></a>00009 <span class="preprocessor">#include "SineWave.h"</span>
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="keyword">namespace </span>stk {
<a name="l00012"></a>00012
<a name="l00013"></a>00013 <span class="comment">/***************************************************/</span>
<a name="l00033"></a>00033 <span class="comment">/***************************************************/</span>
<a name="l00034"></a>00034
<a name="l00035"></a><a class="code" href="classstk_1_1Brass.html">00035</a> <span class="keyword">class </span><a class="code" href="classstk_1_1Brass.html" title="STK simple brass instrument class.">Brass</a>: <span class="keyword">public</span> <a class="code" href="classstk_1_1Instrmnt.html" title="STK instrument abstract base class.">Instrmnt</a>
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 <span class="keyword">public</span>:
<a name="l00039"></a>00039
<a name="l00042"></a>00042 <a class="code" href="classstk_1_1Brass.html#96b223221f536efdaad4e724db01f11b" title="Class constructor, taking the lowest desired playing frequency.">Brass</a>( StkFloat lowestFrequency );
<a name="l00043"></a>00043
<a name="l00045"></a>00045 <a class="code" href="classstk_1_1Brass.html#474528a75bd4fb88cdb9c783d73df8f6" title="Class destructor.">~Brass</a>( );
<a name="l00046"></a>00046
<a name="l00048"></a>00048 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Brass.html#64e48334efdc8f2508c29c5ea4281f2d" title="Reset and clear all internal state.">clear</a>( );
<a name="l00049"></a>00049
<a name="l00051"></a>00051 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Brass.html#5e99e7fee1b92138566a46c828df93e8" title="Set instrument parameters for a particular frequency.">setFrequency</a>( StkFloat frequency );
<a name="l00052"></a>00052
<a name="l00054"></a>00054 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Brass.html#2e1a150328504050499c5cb9fa0e536f" title="Set the lips frequency.">setLip</a>( StkFloat frequency );
<a name="l00055"></a>00055
<a name="l00057"></a>00057 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Brass.html#02533e02818e2848fb6480106a54ce94" title="Apply breath pressure to instrument with given amplitude and rate of increase.">startBlowing</a>( StkFloat amplitude, StkFloat rate );
<a name="l00058"></a>00058
<a name="l00060"></a>00060 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Brass.html#8bf1624aca6283fafb830a3f22546199" title="Decrease breath pressure with given rate of decrease.">stopBlowing</a>( StkFloat rate );
<a name="l00061"></a>00061
<a name="l00063"></a>00063 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Brass.html#e74eba698f27abd43e66e825f5ce72da" title="Start a note with the given frequency and amplitude.">noteOn</a>( StkFloat frequency, StkFloat amplitude );
<a name="l00064"></a>00064
<a name="l00066"></a>00066 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Brass.html#32e2a6d2c9285bb5cf033d8a6b90e3c9" title="Stop a note with the given amplitude (speed of decay).">noteOff</a>( StkFloat amplitude );
<a name="l00067"></a>00067
<a name="l00069"></a>00069 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Brass.html#4d75ac361d11fcc870a330d393dbad80" 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="l00070"></a>00070
<a name="l00072"></a>00072 StkFloat <a class="code" href="classstk_1_1Brass.html#4af1b7c4c1b374b65e04ccaa90886321" title="Compute and return one output sample.">tick</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> channel = 0 );
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keyword">protected</span>:
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <a class="code" href="classstk_1_1DelayA.html" title="STK allpass interpolating delay line class.">DelayA</a> delayLine_;
<a name="l00077"></a>00077 <a class="code" href="classstk_1_1BiQuad.html" title="STK biquad (two-pole, two-zero) filter class.">BiQuad</a> lipFilter_;
<a name="l00078"></a>00078 <a class="code" href="classstk_1_1PoleZero.html" title="STK one-pole, one-zero filter class.">PoleZero</a> dcBlock_;
<a name="l00079"></a>00079 <a class="code" href="classstk_1_1ADSR.html" title="STK ADSR envelope class.">ADSR</a> adsr_;
<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 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> length_;
<a name="l00082"></a>00082 StkFloat lipTarget_;
<a name="l00083"></a>00083 StkFloat slideTarget_;
<a name="l00084"></a>00084 StkFloat vibratoGain_;
<a name="l00085"></a>00085 StkFloat maxPressure_;
<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_1Brass.html#4af1b7c4c1b374b65e04ccaa90886321">00089</a> <span class="keyword">inline</span> StkFloat <a class="code" href="classstk_1_1Brass.html#4af1b7c4c1b374b65e04ccaa90886321" title="Compute and return one output sample.">Brass :: tick</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> )
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 StkFloat breathPressure = maxPressure_ * adsr_.<a class="code" href="classstk_1_1ADSR.html#f2c0869f86210a55f4f668172373c975" title="Compute and return one output sample.">tick</a>();
<a name="l00092"></a>00092 breathPressure += vibratoGain_ * vibrato_.<a class="code" href="classstk_1_1SineWave.html#31a55627bf8064919b5e063059260eda" title="Compute and return one output sample.">tick</a>();
<a name="l00093"></a>00093
<a name="l00094"></a>00094 StkFloat mouthPressure = 0.3 * breathPressure;
<a name="l00095"></a>00095 StkFloat borePressure = 0.85 * delayLine_.<a class="code" href="classstk_1_1DelayA.html#4372d0e178af1cb6ca465affddfb1566" title="Return the last computed output value.">lastOut</a>();
<a name="l00096"></a>00096 StkFloat deltaPressure = mouthPressure - borePressure; <span class="comment">// Differential pressure.</span>
<a name="l00097"></a>00097 deltaPressure = lipFilter_.<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>( deltaPressure ); <span class="comment">// Force - &gt; position.</span>
<a name="l00098"></a>00098 deltaPressure *= deltaPressure; <span class="comment">// Basic position to area mapping.</span>
<a name="l00099"></a>00099 <span class="keywordflow">if</span> ( deltaPressure &gt; 1.0 ) deltaPressure = 1.0; <span class="comment">// Non-linear saturation.</span>
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="comment">// The following input scattering assumes the mouthPressure = area.</span>
<a name="l00102"></a>00102 lastFrame_[0] = deltaPressure * mouthPressure + ( 1.0 - deltaPressure) * borePressure;
<a name="l00103"></a>00103 lastFrame_[0] = delayLine_.<a class="code" href="classstk_1_1DelayA.html#e602abe91560fb5f141db52333359b74" title="Input one sample to the filter and return one output.">tick</a>( dcBlock_.<a class="code" href="classstk_1_1PoleZero.html#1a29ac6f3a2b75e71693c73554599228" title="Input one sample to the filter and return one output.">tick</a>( lastFrame_[0] ) );
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="keywordflow">return</span> lastFrame_[0];
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107
<a name="l00108"></a>00108 } <span class="comment">// stk namespace</span>
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <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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