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<div class="refentry" title="lorisplay">
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<h2>
<span class="refentrytitle">lorisplay</span>
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<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>
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<div class="refsect1" title="Syntax">
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<h2>Syntax</h2>
<pre class="synopsis">ar <span class="command"><strong>lorisplay</strong></span> ireadidx, kfreqenv, kampenv, kbwenv</pre>
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<div class="refsect1" title="Description">
<a id="id2996160"></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>
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<div class="refsect1" title="Initialization">
<a id="id2997105"></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>
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<div class="refsect1" title="Performance">
<a id="id2997152"></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>
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<div class="refsect1" title="Credits">
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<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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