Help/UGens/Analysis/Slope.html

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  23 <p class="p1"><b>Slope<span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>slope of signal</b></p>
  24 <p class="p2"><br></p>
  25 <p class="p3"><b>Slope.ar(in, mul, add)</b></p>
  26 <p class="p3"><b>Slope.kr(in, mul, add)</b></p>
  27 <p class="p2"><br></p>
  28 <p class="p3">Measures the rate of change per second of a signal.</p>
  29 <p class="p3">Formula implemented is:</p>
  30 <p class="p2"><br></p>
  31 <p class="p4">out[i] = (in[i] - in[i-1]) * sampling_rate</p>
  32 <p class="p2"><br></p>
  33 <p class="p3"><b>in</b> - input signal to measure.</p>
  34 <p class="p2"><br></p>
  35 <p class="p5">(</p>
  36 <p class="p5">{</p>
  37 <p class="p5"><span class="Apple-tab-span">     </span><span class="s1">var</span> a, b, c, scale;</p>
  38 <p class="p6"><span class="s2"><span class="Apple-tab-span">    </span>a = </span><span class="s1">LFNoise2</span><span class="s2">.ar(2000);<span class="Apple-tab-span">      </span></span>// quadratic noise</p>
  39 <p class="p6"><span class="s2"><span class="Apple-tab-span">    </span>b = </span><span class="s1">Slope</span><span class="s2">.ar(a);<span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// first derivative produces line segments</p>
  40 <p class="p6"><span class="s2"><span class="Apple-tab-span">    </span>c = </span><span class="s1">Slope</span><span class="s2">.ar(b);<span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// second derivative produces constant segments</p>
  41 <p class="p6"><span class="s2"><span class="Apple-tab-span">    </span>scale = 0.0002;<span class="Apple-tab-span">     </span></span>// needed to scale back to +/- 1.0</p>
  42 <p class="p5"><span class="Apple-tab-span">     </span>[a, b * scale, c * scale.squared]</p>
  43 <p class="p5">}.plot</p>
  44 <p class="p5">)</p>
  45 <p class="p7"><br></p>
  46 <p class="p3">For another example of Slope see<b> [hypot]</b>.</p>
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