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<h2>
<span class="refentrytitle">osciliktp</span>
</h2>
<p>osciliktp —
A linearly interpolated oscillator that allows allows phase modulation.
</p>
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<div class="refsect1">
<a id="idm281472908855832"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>osciliktp</em></span> allows phase modulation (which is actually implemented as k-rate frequency modulation, by differentiating phase input). The disadvantage is that there is no amplitude control, and frequency can be varied only at the control-rate. This opcode can be faster or slower than <a class="link" href="oscilikt.html" title="oscilikt"><em class="citetitle">oscilikt</em></a>, depending on the control-rate.
</p>
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<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>osciliktp</strong></span> kcps, kfn, kphs [, istor]</pre>
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<div class="refsect1">
<a id="idm281472908781512"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>istor</em></span> (optional, defaults to 0) -- Skips initialization.
</p>
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<div class="refsect1">
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<h2>Performance</h2>
<p>
<span class="emphasis"><em>ares</em></span> -- audio-rate ouptut signal.
</p>
<p>
<span class="emphasis"><em>kcps</em></span> -- frequency in Hz. Zero and negative values are allowed. However, the absolute value must be less than <a class="link" href="sr.html" title="sr"><em class="citetitle">sr</em></a> (and recommended to be less than <span class="emphasis"><em>sr/</em></span>2).
</p>
<p>
<span class="emphasis"><em>kfn</em></span> -- function table number. Can be varied at control rate (useful to <span class="quote">“<span class="quote">morph</span>”</span> waveforms, or select from a set of band-limited tables generated by <a class="link" href="GEN30.html" title="GEN30"><em class="citetitle">GEN30</em></a>).
</p>
<p>
<span class="emphasis"><em>kphs</em></span> -- phase (k-rate), the expected range is 0 to 1. The absolute value of the difference of the current and previous value of <span class="emphasis"><em>kphs</em></span> must be less than <a class="link" href="ksmps.html" title="ksmps"><em class="citetitle">ksmps</em></a>.
</p>
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<div class="refsect1">
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<h2>Examples</h2>
<p>
Here is an example of the osciliktp opcode. It uses the file <a class="ulink" href="examples/osciliktp.csd" target="_top"><em class="citetitle">osciliktp.csd</em></a>.
</p>
<div class="example">
<a id="idm281472908769320"></a>
<p class="title">
<strong>Example 626. Example of the osciliktp 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="idm281472731897160"></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>
<span class="c1">; Audio out Audio in No messages</span>
-odac -iadc -d <span class="c1">;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o osciliktp.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="c1">; Initialize the global variables.</span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">kr</span> <span class="o">=</span> <span class="mi">4410</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">; Instrument #1: osciliktp example</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">phs</span> <span class="nb">line</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">4</span>
a<span class="n">1x</span> <span class="nb">osciliktp</span> <span class="mf">220.5</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span>
a<span class="n">1y</span> <span class="nb">osciliktp</span> <span class="mf">220.5</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="o">-</span>k<span class="n">phs</span>
a<span class="n">1</span> <span class="o">=</span> a<span class="n">1x</span> <span class="o">-</span> a<span class="n">1y</span>
<span class="nb">out</span> a<span class="n">1</span> <span class="o">*</span> <span class="mi">14000</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; Table #1: Sawtooth wave</span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">3</span> <span class="o">-</span><span class="mi">2</span> <span class="mi">1</span> <span class="mi">0</span> <span class="o">-</span><span class="mi">1</span>
<span class="c1">; Play Instrument #1 for four seconds.</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">4</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1">
<a id="idm281472908765128"></a>
<h2>See Also</h2>
<p>
<a class="link" href="oscilikt.html" title="oscilikt"><em class="citetitle">oscilikt</em></a> and
<a class="link" href="oscilikts.html" title="oscilikts"><em class="citetitle">oscilikts</em></a>.
</p>
</div>
<div class="refsect1">
<a id="idm281472908762024"></a>
<h2>Credits</h2>
<p>Author: Istvan Varga</p>
<p>New in version 4.22</p>
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