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<div class="refentry" title="lorisplay">
<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" title="Syntax">
<a id="idp29230984"></a>
<h2>Syntax</h2>
<pre class="synopsis">ar <span class="command"><strong>lorisplay</strong></span> ireadidx, kfreqenv, kampenv, kbwenv</pre>
</div>
<div class="refsect1" title="Description">
<a id="idp29241440"></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" title="Initialization">
<a id="idp29242424"></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" title="Performance">
<a id="idp29245216"></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" title="Examples">
<a id="idp29279976"></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="idp29280968"></a>
<p class="title">
<strong>Example 412. 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>
<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 <span class="comment">;;;realtime audio out</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 lorisplay.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">; clarinet.sdif can be found in /manual/examples</span>
<span class="comment">; Play the partials in clarinet.sdif from 0 to 3 sec with 1 ms fadetime</span>
<span class="comment">; and no frequency , amplitude, or bandwidth modification.</span>
<span class="oblock">instr</span> 1
ktime <span class="opc">linseg</span> 0, p3, 3.0 <span class="comment">; linear time function from 0 to 3 seconds</span>
lorisread ktime, "clarinet.sdif", 1, 1, 1, 1, .001
kfrq <span class="op">=</span> p4 <span class="comment">; pitch shifting</span>
asig lorisplay 1, kfrq, 1, 1
<span class="opc">outs</span> asig, asig
<span class="oblock">endin</span>
<span class="comment">; Play the partials in clarinet.sdif from 0 to 3 sec with 1 ms fadetime</span>
<span class="comment">; adding tuning and vibrato, increasing the "breathiness" (noisiness) and overall</span>
<span class="comment">; amplitude, and adding a highpass filter.</span>
<span class="oblock">instr</span> 2
ktime <span class="opc">linseg</span> 0, p3, 3.0 <span class="comment">; linear time function from 0 to 3 seconds</span>
<span class="comment">; compute frequency scale for tuning</span>
ifscale <span class="op">=</span> <span class="opc">cpspch</span>(p4)<span class="op">/</span><span class="opc">cpspch</span>(8.08) <span class="comment">; (original pitch was G#4)</span>
<span class="comment">; make a vibrato envelope</span>
kvenv <span class="opc">linseg</span> 0, p3<span class="op">/</span>6, 0, p3<span class="op">/</span>6, .02, p3<span class="op">/</span>3, .02, p3<span class="op">/</span>6, 0, p3<span class="op">/</span>6, 0
kvib <span class="opc">oscil</span> kvenv, 4, 1 <span class="comment">; table 1, sinusoid</span>
kbwenv <span class="opc">linseg</span> 1, p3<span class="op">/</span>6, 1, p3<span class="op">/</span>6, 100, 2<span class="op">*</span>p3<span class="op">/</span>3, 100 <span class="comment">;lots of noise</span>
lorisread ktime, "clarinet.sdif", 1, 1, 1, 1, .001
a1 lorisplay 1, ifscale<span class="op">+</span>kvib, 2, kbwenv
asig <span class="opc">atone</span> a1, 1000 <span class="comment">; highpass filter, cutoff 1000 Hz</span>
<span class="opc">outs</span> asig, asig
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; a sinusoid </span>
<span class="stamnt">f</span> 1 0 4096 10 1
<span class="stamnt">i</span> 1 0 3 1.2 <span class="comment">; shifted up</span>
<span class="stamnt">i</span> 1 + 1 1.5
<span class="stamnt">i</span> 1 + 6 .5 <span class="comment">; shifted down</span>
<span class="stamnt">s</span>
<span class="comment">; strt dur ptch</span>
<span class="stamnt">i</span> 2 1 3 8.08
<span class="stamnt">i</span> 2 3.5 1 8.04
<span class="stamnt">i</span> 2 4 6 8.00
<span class="stamnt">i</span> 2 4 6 8.07
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp29283248"></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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