supernova: fixes for boost-1.49 and gcc-4.7
[supercollider.git] / Help / UGens / Noise / LFDClipNoise.html
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22 <p class="p1"><br></p>
23 <p class="p2"><b>LFDClipNoise<span class="Apple-tab-span"> </span><span class="Apple-tab-span"> </span><span class="Apple-tab-span"> </span><span class="Apple-tab-span"> </span>dynamic clipped noise</b></p>
24 <p class="p3"><br></p>
25 <p class="p4"><b>LFClipNoise.ar(freq, mul, add)</b></p>
26 <p class="p3"><br></p>
27 <p class="p4">Like <b>LFClipNoise</b>, it generates the values -1 or +1 at a rate given<span class="Apple-converted-space"> </span></p>
28 <p class="p4">by the <b>freq</b> argument,<span class="Apple-converted-space">  </span>with two differences:<span class="Apple-converted-space"> </span></p>
29 <p class="p3"><br></p>
30 <p class="p4">-no time quantization<span class="Apple-converted-space"> </span></p>
31 <p class="p4">-fast recovery from low freq values.</p>
32 <p class="p3"><br></p>
33 <p class="p4">(LFClipNoise, as well as LFNoise0,1,2 quantize to the nearest integer division<span class="Apple-converted-space"> </span></p>
34 <p class="p4">of the samplerate, and they poll the freq argument only when scheduled;</p>
35 <p class="p4">thus they often seem to hang when freqs get very low).</p>
36 <p class="p3"><br></p>
37 <p class="p4">If you don't need very high or very low freqs, or use fixed freqs,<span class="Apple-converted-space"> </span></p>
38 <p class="p4">LFNoise0 is more efficient.</p>
39 <p class="p3"><br></p>
40 <p class="p4"><b>freq</b> - rate at which to generate random values.</p>
41 <p class="p3"><br></p>
42 <p class="p3"><br></p>
43 <p class="p5">// try wiggling the mouse quickly;</p>
44 <p class="p5">// LFNoise frequently seems stuck, LFDNoise changes smoothly.</p>
45 <p class="p6"><br></p>
46 <p class="p7">{ <span class="s1">LFClipNoise</span>.ar(<span class="s1">MouseX</span>.kr(0.1, 1000, 1), 0.1)<span class="Apple-converted-space">  </span>}.play</p>
47 <p class="p6"><br></p>
48 <p class="p7">{ <span class="s1">LFDClipNoise</span>.ar(<span class="s1">MouseX</span>.kr(0.1, 1000, 1), 0.1)<span class="Apple-converted-space">  </span>}.play</p>
49 <p class="p3"><br></p>
50 <p class="p5">// silent for 2 secs before going up in freq</p>
51 <p class="p6"><br></p>
52 <p class="p7">{ <span class="s1">LFClipNoise</span>.ar(<span class="s1">XLine</span>.kr(0.5, 10000, 3), 0.1) }.scope;</p>
53 <p class="p6"><br></p>
54 <p class="p7">{ <span class="s1">LFDClipNoise</span>.ar(<span class="s1">XLine</span>.kr(0.5, 10000, 3), 0.1) }.scope;</p>
55 <p class="p6"><br></p>
56 <p class="p6"><br></p>
57 <p class="p5">// LFNoise quantizes time steps at high freqs, LFDNoise does not:</p>
58 <p class="p6"><br></p>
59 <p class="p7">{ <span class="s1">LFClipNoise</span>.ar(<span class="s1">XLine</span>.kr(1000, 20000, 10), 0.1) }.scope;</p>
60 <p class="p6"><br></p>
61 <p class="p7">{ <span class="s1">LFDClipNoise</span>.ar(<span class="s1">XLine</span>.kr(1000, 20000, 10), 0.1) }.scope;</p>
62 <p class="p6"><br></p>
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