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<div class="refentry">
<a id="lorisplay"></a>
<div class="titlepage"></div>
<a id="IndexLorisPlay" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">lorisplay</span>
</h2>
<p>lorisplay — renders a stored set of bandwidth-enhanced partials using the method of Bandwidth-Enhanced Additive Synthesis implemented in the Loris software, applying control-rate frequency, amplitude, and bandwidth scaling envelopes.</p>
</div>
<div class="refsect1">
<a id="idm281472918495592"></a>
<h2>Syntax</h2>
<pre class="synopsis">ar <span class="command"><strong>lorisplay</strong></span> ireadidx, kfreqenv, kampenv, kbwenv</pre>
</div>
<div class="refsect1">
<a id="idm281472918490984"></a>
<h2>Description</h2>
<p><span class="emphasis"><em>lorisplay</em></span> renders a stored set of
bandwidth-enhanced partials using the method of Bandwidth-Enhanced
Additive Synthesis implemented in the Loris software, applying
control-rate frequency, amplitude, and bandwidth scaling
envelopes.</p>
</div>
<div class="refsect1">
<a id="idm281472918489256"></a>
<h2>Initialization</h2>
<p><span class="emphasis"><em>istoreidx, ireadidx, isrcidx, itgtidx</em></span> are
labels that identify a stored set of bandwidth-enhanced
partials. <span class="emphasis"><em>lorisread</em></span> imports partials from a SDIF file and stores them
with the integer label istoreidx. <span class="emphasis"><em>lorismorph</em></span> morphs sets of partials
labeled <span class="emphasis"><em>isrcidx</em></span> and <span class="emphasis"><em>itgtidx</em></span>, and stores the resulting partials with
the integer label <span class="emphasis"><em>istoreidx</em></span>. <span class="emphasis"><em>lorisplay</em></span> renders the partials stored
with the label <span class="emphasis"><em>ireadidx</em></span>. The labels are used only at initialization
time, and may be reused without any cost or benefit in efficiency, and
without introducing any interaction between instruments or
instances.</p>
</div>
<div class="refsect1">
<a id="idm281472918420760"></a>
<h2>Performance</h2>
<p><span class="emphasis"><em>lorisplay</em></span> implements signal reconstruction using
Bandwidth-Enhanced Additive Synthesis. The control data is obtained
from a stored set of bandwidth-enhanced partials imported from an SDIF
file using <span class="emphasis"><em>lorisread</em></span> or constructed by another unit generator such as
<span class="emphasis"><em>lorismorph</em></span>. <span class="emphasis"><em>kfreqenv</em></span> is a control-rate transposition factor: a value
of 1 incurs no transposition, 1.5 transposes up a perfect fifth, and
.5 down an octave. <span class="emphasis"><em>kampenv</em></span> is a control-rate scale factor that is
applied to all partial amplitude envelopes. kbwenv is a control-rate
scale factor that is applied to all partial bandwidth or noisiness
envelopes. The bandwidth-enhanced partial data is stored in memory
with a specified label for future access by another generator.</p>
</div>
<div class="refsect1">
<a id="idm281472918416840"></a>
<h2>Examples</h2>
<p>
Here is an example of the lorisplay opcode. It uses the file <a class="ulink" href="examples/lorisplay.csd" target="_top"><em class="citetitle">lorisplay.csd</em></a>.
</p>
<div class="example">
<a id="idm281472918414984"></a>
<p class="title">
<strong>Example 490. Example of the lorisplay opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<div class="refsect1">
<a id="idm281472744633800"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
-odac <span class="c1">;;;realtime audio out</span>
<span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o lorisplay.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">; clarinet.sdif can be found in /manual/examples</span>
<span class="c1">; Play the partials in clarinet.sdif from 0 to 3 sec with 1 ms fadetime</span>
<span class="c1">; and no frequency , amplitude, or bandwidth modification.</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">time</span> <span class="nb">linseg</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mf">3.0</span> <span class="c1">; linear time function from 0 to 3 seconds</span>
<span class="n">lorisread</span> k<span class="n">time</span><span class="p">,</span> <span class="s">"clarinet.sdif"</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">.001</span>
k<span class="n">frq</span> <span class="o">=</span> <span class="nb">p4</span> <span class="c1">; pitch shifting</span>
a<span class="n">sig</span> <span class="n">lorisplay</span> <span class="mi">1</span><span class="p">,</span> k<span class="n">frq</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span>
<span class="kd">endin</span>
<span class="c1">; Play the partials in clarinet.sdif from 0 to 3 sec with 1 ms fadetime</span>
<span class="c1">; adding tuning and vibrato, increasing the "breathiness" (noisiness) and overall</span>
<span class="c1">; amplitude, and adding a highpass filter.</span>
<span class="kd">instr</span> <span class="nf">2</span>
k<span class="n">time</span> <span class="nb">linseg</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mf">3.0</span> <span class="c1">; linear time function from 0 to 3 seconds</span>
<span class="c1">; compute frequency scale for tuning</span>
i<span class="n">fscale</span> <span class="o">=</span> <span class="nb">cpspch</span><span class="p">(</span><span class="nb">p4</span><span class="p">)</span><span class="o">/</span><span class="nb">cpspch</span><span class="p">(</span><span class="mf">8.08</span><span class="p">)</span> <span class="c1">; (original pitch was G#4)</span>
<span class="c1">; make a vibrato envelope</span>
k<span class="n">venv</span> <span class="nb">linseg</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">6</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">6</span><span class="p">,</span> <span class="mf">.02</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">3</span><span class="p">,</span> <span class="mf">.02</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">6</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">6</span><span class="p">,</span> <span class="mi">0</span>
k<span class="n">vib</span> <span class="nb">oscil</span> k<span class="n">venv</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">; table 1, sinusoid</span>
k<span class="n">bwenv</span> <span class="nb">linseg</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">6</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">6</span><span class="p">,</span> <span class="mi">100</span><span class="p">,</span> <span class="mi">2</span><span class="o">*</span><span class="nb">p3</span><span class="o">/</span><span class="mi">3</span><span class="p">,</span> <span class="mi">100</span> <span class="c1">;lots of noise</span>
<span class="n">lorisread</span> k<span class="n">time</span><span class="p">,</span> <span class="s">"clarinet.sdif"</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">.001</span>
a<span class="n">1</span> <span class="n">lorisplay</span> <span class="mi">1</span><span class="p">,</span> i<span class="n">fscale</span><span class="o">+</span>k<span class="n">vib</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> k<span class="n">bwenv</span>
a<span class="n">sig</span> <span class="nb">atone</span> a<span class="n">1</span><span class="p">,</span> <span class="mi">1000</span> <span class="c1">; highpass filter, cutoff 1000 Hz</span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; a sinusoid </span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">4096</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">3</span> <span class="mf">1.2</span> <span class="c1">; shifted up</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="o">+</span> <span class="mi">1</span> <span class="mf">1.5</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="o">+</span> <span class="mi">6</span> <span class="mf">.5</span> <span class="c1">; shifted down</span>
<span class="nb">s</span>
<span class="c1">; strt dur ptch</span>
<span class="nb">i</span> <span class="mi">2</span> <span class="mi">1</span> <span class="mi">3</span> <span class="mf">8.08</span>
<span class="nb">i</span> <span class="mi">2</span> <span class="mf">3.5</span> <span class="mi">1</span> <span class="mf">8.04</span>
<span class="nb">i</span> <span class="mi">2</span> <span class="mi">4</span> <span class="mi">6</span> <span class="mf">8.00</span>
<span class="nb">i</span> <span class="mi">2</span> <span class="mi">4</span> <span class="mi">6</span> <span class="mf">8.07</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472918410696"></a>
<h2>Credits</h2>
<p>This implementation of the Loris unit generators was written by Kelly
Fitz (<a class="ulink" href="mailto:loris@cerlsoundgroup.org" target="_top">loris@cerlsoundgroup.org</a>). It is patterned after a prototype implementation of the
<span class="emphasis"><em>lorisplay</em></span> unit generator written by Corbin Champion, and based on the
method of Bandwidth-Enhanced Additive Synthesis and on the sound
morphing algorithms implemented in the Loris library for sound
modeling and manipulation. The opcodes were further adapted as a
plugin for Csound 5 by Michael Gogins.</p>
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