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<h2>
<span class="refentrytitle">fluidEngine</span>
</h2>
<p>fluidEngine —
Instantiates a fluidsynth engine.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp23013264"></a>
<h2>Syntax</h2>
<pre class="synopsis">ienginenum <span class="command"><strong>fluidEngine</strong></span> [iReverbEnabled] [, iChorusEnabled] [,iNumChannels] [, iPolyphony] </pre>
</div>
<div class="refsect1" title="Description">
<a id="idp23021544"></a>
<h2>Description</h2>
<p>Instantiates a fluidsynth engine, and returns <span class="emphasis"><em>ienginenum</em></span> to identify the
engine. <span class="emphasis"><em>ienginenum</em></span> is passed to other other opcodes for loading
and playing SoundFonts and gathering the generated sound.
</p>
</div>
<div class="refsect1" title="Initialization">
<a id="idp23022768"></a>
<h2>Initialization</h2>
<p><span class="emphasis"><em>ienginenum </em></span> -- engine number assigned from fluidEngine.</p>
<p><span class="emphasis"><em>iReverbEnabled </em></span> -- optionally set to 0 to disable any reverb effect in the loaded SoundFonts.</p>
<p><span class="emphasis"><em>iChorusEnabled </em></span> -- optionally set to 0 to disable any chorus effect in the loaded SoundFonts.</p>
<p><span class="emphasis"><em>iNumChannels </em></span> -- number of channels to use; range is 16-256 and Csound default is 256 (Fluidsynth's default is 16).</p>
<p><span class="emphasis"><em>iPolyphony </em></span> -- number of voices to be played in parallel; range is 16-4096 and Csound default is 4096 (Fluidsynth's default is 256).
Note: this is not the number of notes played at the same time as a single note may use create multiple voices depending on instrument zones
and velocity/key of played note.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp23025544"></a>
<h2>Examples</h2>
<p>
Here is example of the fluidsynth opcodes using 2 engines. It uses the file <a class="ulink" href="examples/fluidEngine.csd" target="_top"><em class="citetitle">fluidEngine.csd</em></a> and <a class="ulink" href="examples/midichn_advanced.mid" target="_top"><em class="citetitle">midichn_advanced.mid</em></a>.
</p>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac -F midichn_advanced.mid <span class="comment">;;;reatime audio out and midifile in</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o fluidEngine.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="comment">; LOAD SOUNDFONTS</span>
gienginenum1 <span class="opc">fluidEngine</span>
gienginenum2 <span class="opc">fluidEngine</span>
isfnum1 <span class="opc">fluidLoad</span> "sf_GMbank.sf2", gienginenum1, 1
<span class="comment">; Piano 2, program 1, channel 1</span>
<span class="opc">fluidProgramSelect</span> gienginenum1, 1, isfnum1, 0, 1
<span class="comment">; Piano 3, program 2, channel 2</span>
<span class="opc">fluidProgramSelect</span> gienginenum1, 2, isfnum1, 0, 2
isfnum2 <span class="opc">fluidLoad</span> "19Trumpet.sf2", gienginenum2, 1
<span class="comment">; Trumpet, program 56, channel 3</span>
<span class="opc">fluidProgramSelect</span> gienginenum2, 3, isfnum2, 0, 56
<span class="comment">;Look for midifile in folder manual/examples</span>
<span class="comment">;"midichn_advanced.mid" sends notes to the soundfonts</span>
<span class="oblock">instr</span> 1 <span class="comment">; GM soundfont</span>
<span class="comment">; INITIALIZATION</span>
<span class="opc">mididefault</span> 60, p3 <span class="comment">; Default duration of 60 -- overridden by score.</span>
<span class="opc">midinoteonkey</span> p4, p5 <span class="comment">; Channels MIDI input to pfields.</span>
<span class="comment">; Use channel assigned in fluidload.</span>
ichannel <span class="op">=</span> 1
ikey <span class="op">=</span> p4
ivelocity <span class="op">=</span> p5
<span class="opc">fluidNote</span> gienginenum1, ichannel, ikey, ivelocity
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2 <span class="comment">; GM soundfont</span>
<span class="comment">; INITIALIZATION</span>
<span class="opc">mididefault</span> 60, p3 <span class="comment">; Default duration of 60 -- overridden by score.</span>
<span class="opc">midinoteonkey</span> p4, p5 <span class="comment">; Channels MIDI input to pfields.</span>
<span class="comment">; Use channel assigned in fluidload.</span>
ichannel <span class="op">=</span> 2
ikey <span class="op">=</span> p4
ivelocity <span class="op">=</span> p5
<span class="opc">fluidNote</span> gienginenum1, ichannel, ikey, ivelocity
<span class="oblock">endin</span>
<span class="oblock">instr</span> 3 <span class="comment">; Trumpet</span>
<span class="comment">; INITIALIZATION</span>
<span class="opc">mididefault</span> 60, p3 <span class="comment">; Default duration of 60 -- overridden by score.</span>
<span class="opc">midinoteonkey</span> p4, p5 <span class="comment">; Channels MIDI input to pfields.</span>
<span class="comment">; Use channel assigned in fluidload.</span>
ichannel <span class="op">=</span> 3
ikey <span class="op">=</span> p4
ivelocity <span class="op">=</span> p5
<span class="opc">fluidNote</span> gienginenum2, ichannel, ikey, ivelocity
<span class="oblock">endin</span>
<span class="comment">; COLLECT AUDIO FROM ALL SOUNDFONTS</span>
<span class="oblock">instr</span> 100 <span class="comment">; Fluidsynth output</span>
iamplitude1 <span class="op">=</span> 7
iamplitude2 <span class="op">=</span> 7
<span class="comment">; AUDIO</span>
aleft1, aright1 <span class="opc">fluidOut</span> gienginenum1
aleft2, aright2 <span class="opc">fluidOut</span> gienginenum2
<span class="opc">outs</span> (aleft1 <span class="op">*</span> iamplitude1) <span class="op">+</span> (aleft2 <span class="op">*</span> iamplitude2), \
(aright1 <span class="op">*</span> iamplitude1) <span class="op">+</span> (aright2 <span class="op">*</span> iamplitude2)
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 3 60 100
<span class="stamnt">i</span> 2 1 3 60 100
<span class="stamnt">i</span> 3 3 3 63 100
<span class="stamnt">i</span> 100 0 10 <span class="comment">;run for 10 seconds </span>
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
<div class="refsect1" title="See Also">
<a id="idp23144032"></a>
<h2>See Also</h2>
<p><a class="link" href="fluidNote.html" title="fluidNote"><em class="citetitle">fluidNote</em></a>, <a class="link" href="fluidLoad.html" title="fluidLoad"><em class="citetitle">fluidLoad</em></a></p>
<p> More information on soundfonts in the Floss Manuals: <a class="ulink" href="http://en.flossmanuals.net/csound/ch048_d-reading-midi-files" target="_top"><em class="citetitle">http://en.flossmanuals.net/csound/ch048_d-reading-midi-files</em></a></p>
<p> Other information on soundfonts on Wikipedia: <a class="ulink" href="http://en.wikipedia.org/wiki/Soundfont" target="_top"><em class="citetitle">http://en.wikipedia.org/wiki/Soundfont</em></a></p>
</div>
<div class="refsect1" title="Credits">
<a id="idp23146728"></a>
<h2>Credits</h2>
<p>Michael Gogins (gogins at pipeline dot com), Steven Yi.
Thanks to Peter Hanappe for Fluidsynth.</p>
<p>Optional <span class="emphasis"><em>iNumChannels</em></span> and <span class="emphasis"><em>iPolyphony</em></span> parameters added in 5.07</p>
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