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authorLudvig Gunne Lindström <ludviggunnelindstrom@gmail.com>2026-07-17 11:43:24 +0200
committerLudvig Gunne Lindström <ludviggunnelindstrom@gmail.com>2026-11-08 14:15:04 +0100
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+<p><a href="/melisma-modules">Back to repository</a></p>
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+<h1>Melisma modules</h1>
+
+
+<ul>
+ <li><a href="../index.html">Index</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#Methods">Methods</a></li>
+</ul>
+
+
+<h2>Classes</h2>
+<ul class="nowrap">
+ <li><a href="../classes/buffer.html">buffer</a></li>
+ <li><a href="../classes/delay.html">delay</a></li>
+ <li><a href="../classes/gain.html">gain</a></li>
+ <li><strong>interp</strong></li>
+ <li><a href="../classes/ladspa.html">ladspa</a></li>
+ <li><a href="../classes/mixer.html">mixer</a></li>
+ <li><a href="../classes/nullsink.html">nullsink</a></li>
+ <li><a href="../classes/oscil.html">oscil</a></li>
+ <li><a href="../classes/pan.html">pan</a></li>
+ <li><a href="../classes/playback.html">playback</a></li>
+ <li><a href="../classes/sample.html">sample</a></li>
+ <li><a href="../classes/serial.html">serial</a></li>
+ <li><a href="../classes/timer.html">timer</a></li>
+</ul>
+<h2>Modules</h2>
+<ul class="nowrap">
+ <li><a href="../modules/biquad.html">biquad</a></li>
+ <li><a href="../modules/expression.html">expression</a></li>
+ <li><a href="../modules/fs.html">fs</a></li>
+ <li><a href="../modules/keycallback.html">keycallback</a></li>
+ <li><a href="../modules/udp.html">udp</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Class <code>interp</code></h1>
+<p>Interpolation.</p>
+<p>
+
+
+
+<pre>
+<span class="keyword">local</span> minterp = <span class="global">require</span> <span class="string">'melisma.interp'</span>
+<span class="keyword">local</span> mevent = <span class="global">require</span> <span class="string">'melisma.event'</span>
+<span class="keyword">local</span> mgain = <span class="global">require</span> <span class="string">'melisma.gain'</span>
+
+<span class="keyword">local</span> interp = minterp.<span class="function-name">init</span>(<span class="number">0</span>)
+
+interp:<span class="function-name">linear</span>(<span class="number">1</span>,<span class="number">1</span>)
+
+mevent.<span class="function-name">schedule</span>(<span class="number">0.5</span>, <span class="keyword">function</span>()
+ <span class="global">print</span>(<span class="string">'current value:'</span>, interp:<span class="function-name">sample</span>())
+<span class="keyword">end</span>)
+
+<span class="keyword">local</span> sig = ...
+<span class="keyword">local</span> gain = mgain.<span class="function-name">linear</span>(sig,interp)
+</pre>
+
+</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+ <tr>
+ <td class="name" nowrap><a href="#interp.init">interp.init(x0)</a></td>
+ <td class="summary">Initialize an interpolation unit.</td>
+ </tr>
+</table>
+<h2><a href="#Methods">Methods</a></h2>
+<table class="function_list">
+ <tr>
+ <td class="name" nowrap><a href="#interp:ease_in">interp:ease_in(v, t)</a></td>
+ <td class="summary">Interpolate using ease-in interpolation.</td>
+ </tr>
+ <tr>
+ <td class="name" nowrap><a href="#interp:ease_out">interp:ease_out(v, t)</a></td>
+ <td class="summary">Interpolate using ease-out interpolation.</td>
+ </tr>
+ <tr>
+ <td class="name" nowrap><a href="#interp:linear">interp:linear(v, t)</a></td>
+ <td class="summary">Interpolate using linear interpolation.</td>
+ </tr>
+ <tr>
+ <td class="name" nowrap><a href="#interp:sample">interp:sample()</a></td>
+ <td class="summary">Get the current value.</td>
+ </tr>
+ <tr>
+ <td class="name" nowrap><a href="#interp:set">interp:set(x)</a></td>
+ <td class="summary">Set value directly.</td>
+ </tr>
+ <tr>
+ <td class="name" nowrap><a href="#interp:smoothstep">interp:smoothstep(v, t)</a></td>
+ <td class="summary">Interpolate using smoothstep interpolation.</td>
+ </tr>
+</table>
+
+<br/>
+<br/>
+
+
+ <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+ Methods
+ <dl class="function">
+ <dt>
+ <a name = "interp.init"></a>
+ <strong>interp.init(x0)</strong>
+ </dt>
+ <dd>
+ Initialize an interpolation unit.
+
+
+ <h3>Parameters:</h3>
+ <ul>
+ <li><span class="parameter">x0</span>
+ <span class="types"><span class="type">number</span></span>
+ Initial value.
+ </li>
+ </ul>
+
+ <h3>Returns:</h3>
+ <ol>
+
+ <span class="types"><a class="type" href="../classes/interp.html#">interp</a></span>
+ The newly created interpolation unit.
+ </ol>
+
+
+
+
+</dd>
+</dl>
+ <h2 class="section-header "><a name="Methods"></a>Methods</h2>
+
+ <dl class="function">
+ <dt>
+ <a name = "interp:ease_in"></a>
+ <strong>interp:ease_in(v, t)</strong>
+ </dt>
+ <dd>
+ Interpolate using ease-in interpolation.
+
+
+ <h3>Parameters:</h3>
+ <ul>
+ <li><span class="parameter">v</span>
+ <span class="types"><span class="type">number</span></span>
+ Target value.
+ </li>
+ <li><span class="parameter">t</span>
+ <span class="types"><span class="type">number</span></span>
+ Interpolation time.
+ </li>
+ </ul>
+
+
+
+
+
+</dd>
+ <dt>
+ <a name = "interp:ease_out"></a>
+ <strong>interp:ease_out(v, t)</strong>
+ </dt>
+ <dd>
+ Interpolate using ease-out interpolation.
+
+
+ <h3>Parameters:</h3>
+ <ul>
+ <li><span class="parameter">v</span>
+ <span class="types"><span class="type">number</span></span>
+ Target value.
+ </li>
+ <li><span class="parameter">t</span>
+ <span class="types"><span class="type">number</span></span>
+ Interpolation time.
+ </li>
+ </ul>
+
+
+
+
+
+</dd>
+ <dt>
+ <a name = "interp:linear"></a>
+ <strong>interp:linear(v, t)</strong>
+ </dt>
+ <dd>
+ Interpolate using linear interpolation.
+
+
+ <h3>Parameters:</h3>
+ <ul>
+ <li><span class="parameter">v</span>
+ <span class="types"><span class="type">number</span></span>
+ Target value.
+ </li>
+ <li><span class="parameter">t</span>
+ <span class="types"><span class="type">number</span></span>
+ Interpolation time.
+ </li>
+ </ul>
+
+
+
+
+
+</dd>
+ <dt>
+ <a name = "interp:sample"></a>
+ <strong>interp:sample()</strong>
+ </dt>
+ <dd>
+ Get the current value.
+
+
+
+ <h3>Returns:</h3>
+ <ol>
+
+ <span class="types"><span class="type">number</span></span>
+ The current value.
+ </ol>
+
+
+
+
+</dd>
+ <dt>
+ <a name = "interp:set"></a>
+ <strong>interp:set(x)</strong>
+ </dt>
+ <dd>
+ Set value directly.
+
+
+ <h3>Parameters:</h3>
+ <ul>
+ <li><span class="parameter">x</span>
+ <span class="types"><span class="type">number</span></span>
+ New value.
+ </li>
+ </ul>
+
+
+
+
+
+</dd>
+ <dt>
+ <a name = "interp:smoothstep"></a>
+ <strong>interp:smoothstep(v, t)</strong>
+ </dt>
+ <dd>
+ Interpolate using smoothstep interpolation.
+
+
+ <h3>Parameters:</h3>
+ <ul>
+ <li><span class="parameter">v</span>
+ <span class="types"><span class="type">number</span></span>
+ Target value.
+ </li>
+ <li><span class="parameter">t</span>
+ <span class="types"><span class="type">number</span></span>
+ Interpolation time.
+ </li>
+ </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
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