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<title>About Additive - gungerky</title>
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<h1>Additive Instrument Component</h1>
<span>Code written by Kyle Gunger</span>
<p>
CAdditiveInstrument is first initialized by a pointer to the parameter xml node,<br>
which it uses to populate the parameters such as sound definitions. Afterward it<br>
is given the Note, from which it reads things like the starting and ending frequency<br>
as well as the starting and ending sound definition. Internally it uses a vector of<br>
CSoundDef classes to hold the sound definitions, each represents a summation of sin<br>
waves. It also uses a CCrossFade and CADSR node to represent the fading between<br>
CSoundDef and Envelope, respectively. It uses the proper CSoundDefs as sources for<br>
the CCrossFade node and the CCrossFade node as source for the CADSR node. When<br>
Generate is called on the CADSR node it is called recursivly on the child nodes and<br>
then interpolated via the ADSR rules.<br><br>
In generating the soundwave, it checks the envelope to see how far along we are, and uses<br>
that percentage to interpolate both the frequency and cross-fading.
</p>
<span class="attr">Supported grading elements:</span>
<ul>
<li>Sinusoid playback - Yes</li>
<li>Harmonic definition - Yes</li>
<li>Envelope - Yes</li>
<li>Polyphony - Yes (via synthesizer controller)</li>
<li>Sound cross-fading - Yes</li>
<li>Glissando - Yes (only between two notes at a time)</li>
</ul>
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