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<div class="refentry" title="lorismorph">
<a id="lorismorph"></a>
<div class="titlepage"></div>
<a id="IndexLorisMorph" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">lorismorph</span>
</h2>
<p>lorismorph — Morphs two stored sets of bandwidth-enhanced partials
and stores a new set of partials representing the morphed
sound. The morph is performed by linearly interpolating the
parameter envelopes (frequency, amplitude, and bandwidth, or
noisiness) of the bandwidth-enhanced partials according to
control-rate frequency, amplitude, and bandwidth morphing
functions. </p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp29194680"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>lorismorph</strong></span> isrcidx, itgtidx, istoreidx, kfreqmorphenv, kampmorphenv, kbwmorphenv</pre>
</div>
<div class="refsect1" title="Description">
<a id="idp29205208"></a>
<h2>Description</h2>
<p><span class="emphasis"><em>lorismorph</em></span> morphs two stored sets of bandwidth-enhanced
partials and stores a new set of partials representing the morphed
sound. The morph is performed by linearly interpolating the
parameter envelopes (frequency, amplitude, and bandwidth, or
noisiness) of the bandwidth-enhanced partials according to
control-rate frequency, amplitude, and bandwidth morphing
functions.
</p>
</div>
<div class="refsect1" title="Initialization">
<a id="idp29206344"></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="idp29209104"></a>
<h2>Performance</h2>
<p><span class="emphasis"><em>lorismorph</em></span> generates a set of bandwidth-enhanced partials by
morphing two stored sets of partials, the source and target partials,
which may have been imported using <span class="emphasis"><em>lorisread</em></span>, or generated by another
unit generator, including another instance of <span class="emphasis"><em>lorismorph</em></span>. The morph is
performed by interpolating the parameters of corresponding (labeled)
partials in the two source sounds. The sound morph is
described by three control-rate morphing envelopes. <span class="emphasis"><em>kfreqmorphenv</em></span>
describes the interpolation of partial frequency values in the two
source sounds. When <span class="emphasis"><em>kfreqmorphenv</em></span> is 0, partial frequencies are
obtained from the partials stored at <span class="emphasis"><em>isrcidx</em></span>. When <span class="emphasis"><em>kfreqmorphenv</em></span> is 1,
partial frequencies are obtained from the partials at <span class="emphasis"><em>itgtidx</em></span>. When
<span class="emphasis"><em>kfreqmorphenv</em></span> is between 0 and 1, the partial frequencies are
interpolated between corresponding source and target
partials. Interpolation of partial amplitudes and bandwidth
(noisiness) coefficients are similarly described by <span class="emphasis"><em>kampmorphenv</em></span> and
<span class="emphasis"><em>kbwmorphenv</em></span>.</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp29248320"></a>
<h2>Examples</h2>
<p>
Here is an example of the lorismorph opcode. It uses the file <a class="ulink" href="examples/lorismorph.csd" target="_top"><em class="citetitle">lorismorph.csd</em></a>.
</p>
<div class="example">
<a id="idp29249312"></a>
<p class="title">
<strong>Example 411. Example of the lorismorph 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 lorismorph.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 and meow.sdif can be found in /manual/examples</span>
<span class="comment">; Morph the partials in meow.sdif into the partials in clarinet.sdif over the duration of</span>
<span class="comment">; the sustained portion of the two tones (from .2 to 2.0 seconds in the meow, and from</span>
<span class="comment">; .5 to 2.1 seconds in the clarinet). The onset and decay portions in the morphed sound are</span>
<span class="comment">; specified by parameters p4 and p5, respectively. The morphing time is the time between the</span>
<span class="comment">; onset and the decay. The meow partials are shfited in pitch to match the pitch of the clarinet</span>
<span class="comment">; tone (D above middle C). </span>
<span class="oblock">instr</span> 1
ionset <span class="op">=</span> p4
idecay <span class="op">=</span> p5
itmorph <span class="op">=</span> p3 <span class="op">-</span> (ionset <span class="op">+</span> idecay)
ipshift <span class="op">=</span> <span class="opc">cpspch</span>(8.02)<span class="op">/</span><span class="opc">cpspch</span>(8.08)
ktme <span class="opc">linseg</span> 0, ionset, .2, itmorph, 2.0, idecay, 2.1 <span class="comment">; meow time function, morph from .2 to 2.0 seconds</span>
ktcl <span class="opc">linseg</span> 0, ionset, .5, itmorph, 2.1, idecay, 2.3 <span class="comment">; clarinet time function, morph from .5 to 2.1 seconds</span>
kmurph <span class="opc">linseg</span> 0, ionset, 0, itmorph, 1, idecay, 1
lorisread ktme, "meow.sdif", 1, ipshift, 2, 1, .001
lorisread ktcl, "clarinet.sdif", 2, 1, 1, 1, .001
lorismorph 1, 2, 3, kmurph, kmurph, kmurph
asig lorisplay 3, 1, 1, 1
<span class="opc">outs</span> asig, asig
<span class="oblock">endin</span>
<span class="comment">; Morph the partials in clarinet.sdif into the partials in meow.sdif. The start and end times</span>
<span class="comment">; for the morph are specified by parameters p4 and p5, respectively. The morph occurs over the</span>
<span class="comment">; second of four pitches in each of the sounds, from .75 to 1.2 seconds in the flutter-tongued</span>
<span class="comment">; clarinet tone, and from 1.7 to 2.2 seconds in the cat's meow. Different morphing functions are</span>
<span class="comment">; used for the frequency and amplitude envelopes, so that the partial amplitudes make a faster </span>
<span class="comment">; transition from clarinet to cat than the frequencies. (The bandwidth envelopes use the same </span>
<span class="comment">; morphing function as the amplitudes.) </span>
<span class="oblock">instr</span> 2
ionset <span class="op">=</span> p4
imorph <span class="op">=</span> p5 <span class="op">-</span> p4
irelease <span class="op">=</span> p3 <span class="op">-</span> p5
ktclar <span class="opc">linseg</span> 0, ionset, .75, imorph, 1.2, irelease, 2.4
ktmeow <span class="opc">linseg</span> 0, ionset, 1.7, imorph, 2.2, irelease, 3.4
kmfreq <span class="opc">linseg</span> 0, ionset, 0, .75<span class="op">*</span>imorph, .25, .25<span class="op">*</span>imorph, 1, irelease, 1
kmamp <span class="opc">linseg</span> 0, ionset, 0, .75<span class="op">*</span>imorph, .9, .25<span class="op">*</span>imorph, 1, irelease, 1
lorisread ktclar, "clarinet.sdif", 1, 1, 1, 1, .001
lorisread ktmeow, "meow.sdif", 2, 1, 1, 1, .001
lorismorph 1, 2, 3, kmfreq, kmamp, kmamp
asig lorisplay 3, 1, 1, 1
<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">; strt dur onset decay</span>
<span class="stamnt">i</span> 1 0 3 .25 .15
<span class="stamnt">i</span> 1 + 1 .10 .10
<span class="stamnt">i</span> 1 + 6 1. 1.
<span class="comment">; strt dur morph_start morph_end</span>
<span class="stamnt">i</span> 2 9 4 .75 2.75
<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="idp29251592"></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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