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<li class="toctree-l4"><a class="reference internal" href="#std.AudioMix"><code class="docutils literal notranslate"><span class="pre">AudioMix()</span></code></a></li>
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<section id="audiomix">
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<h1>AudioMix<a class="headerlink" href="#audiomix" title="Permalink to this heading"></a></h1>
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<dl class="py function">
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<dt class="sig sig-object py" id="std.AudioMix">
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<span class="sig-prename descclassname"><span class="pre">std.</span></span><span class="sig-name descname"><span class="pre">AudioMix</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">anode[]</span> <span class="pre">clips</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">float[]</span> <span class="pre">matrix</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">int[]</span> <span class="pre">channels_out</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#std.AudioMix" title="Permalink to this definition"></a></dt>
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<dd><p>AudioMix can mix and combine channels from different clips in the most
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general way possible.</p>
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<p>Most of the returned clip’s properties are implicitly determined from the
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first clip given to <em>clips</em>.</p>
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<p>The <em>clips</em> parameter takes one or more clips with the same format. If the clips
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are different lengths they’ll be zero extended to that of the longest.</p>
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<p>The argument <em>matrix</em> applies the coefficients to each channel of each input clip where
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the channels are in the numerical order of their channel constants. For example a stereo clip
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will have its channels presented in the order FRONT_LEFT and then FRONT_RIGHT.</p>
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<p>Output channels and order is determined by the <em>channels_out</em> array
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between input index and output channel happens on the order of lowest output channel
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identifier to the highest.</p>
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<p>Below are some examples of useful operations.</p>
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<p>Downmix stereo audio to mono:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">AudioMix</span><span class="p">(</span><span class="n">clips</span><span class="o">=</span><span class="n">clip</span><span class="p">,</span> <span class="n">matrix</span><span class="o">=</span><span class="p">[</span><span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">],</span> <span class="n">channels_out</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_CENTER</span><span class="p">])</span>
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</pre></div>
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</div>
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<p>Downmix 5.1 audio:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">AudioMix</span><span class="p">(</span><span class="n">clips</span><span class="o">=</span><span class="n">clip</span><span class="p">,</span> <span class="n">matrix</span><span class="o">=</span><span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">0.7071</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">0.7071</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.7071</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">0.7071</span><span class="p">],</span> <span class="n">channels_out</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_RIGHT</span><span class="p">])</span>
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</pre></div>
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</div>
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<p>Copy stereo audio to 5.1 and zero the other channels:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">AudioMix</span><span class="p">(</span><span class="n">clips</span><span class="o">=</span><span class="n">c</span><span class="p">,</span> <span class="n">matrix</span><span class="o">=</span><span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">],</span> <span class="n">channels_out</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_RIGHT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_CENTER</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">LOW_FREQUENCY</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">BACK_LEFT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">BACK_RIGHT</span><span class="p">])</span>
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