Help/GUI/Cocoa-GUI/SCFreqScope.html

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  44 <p class="p1"><span class="s1"><b>SCFreqScope<span class="Apple-tab-span">      </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></b></span><b>frequency analysis view</b><span class="s1"><b><span class="Apple-tab-span">       </span></b></span></p>
  45 <p class="p2"><br></p>
  46 <p class="p1"><b>Inherits from: Object : </b><a href="SCView.html"><span class="s2"><b>SCView</b></span></a><b> : </b><a href="SCScope.html"><span class="s2"><b>SCScope</b></span></a></p>
  47 <p class="p3"><br></p>
  48 <p class="p1">SCFreqScope shows the frequency spectrum of a specified audio bus.</p>
  49 <p class="p2"><br></p>
  50 <p class="p4"><span class="s3"><b>See also:</b> <a href="SCScope.html"><span class="s4">SCScope</span></a>, <a href="SCFreqScopeWindow.html"><span class="s5">SCFreqScopeWindow</span></a></span></p>
  51 <p class="p2"><br></p>
  52 <p class="p5"><b>A Very Important Issue Regarding SCFreqScope:</b></p>
  53 <p class="p2"><br></p>
  54 <p class="p1">The scope will remain active after a command-period. To turn it off you must use the 'active' method.</p>
  55 <p class="p1"><b>Very important:</b> You must run <b>kill() </b>when the parent window is closed to avoid problems.</p>
  56 <p class="p1">It also frees the buffers that the scope allocated and stops the FFT analysis synth. So:</p>
  57 <p class="p2"><br></p>
  58 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>(</p>
  59 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>w = <span class="s6">SCWindow</span>(<span class="s7">"My Analyzer"</span>, <span class="s6">Rect</span>(0, 0, 511, 300));</p>
  60 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>f = <span class="s6">SCFreqScope</span>(w, w.view.bounds);</p>
  61 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>w.onClose_({ f.kill }); <span class="s8">// YOU MUST HAVE THIS</span></p>
  62 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>w.front;</p>
  63 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>)</p>
  64 <p class="p2"><br></p>
  65 <p class="p5"><b>Creation / Class Methods</b></p>
  66 <p class="p7"><br></p>
  67 <p class="p8"><b><span class="Apple-tab-span">  </span>*new (parent, bounds)</b></p>
  68 <p class="p9"><b><span class="Apple-tab-span">  </span></b></p>
  69 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>parent </b>- The parent view.</p>
  70 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>bounds </b>- An instance of <a href="../../Geometry/Rect.html"><span class="s9">Rect</span></a>, or a <a href="../../Geometry/Point.html"><span class="s9">Point</span></a> indicating width@height.</p>
  71 <p class="p11"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
  72 <p class="p12"><span class="s3"><span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></span>// Start internal server</p>
  73 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>s = <span class="s6">Server</span>.internal.boot;</p>
  74 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span></p>
  75 <p class="p12"><span class="s3"><span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></span>// Create analyzer in a window</p>
  76 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>(</p>
  77 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>w = <span class="s6">SCWindow</span>(<span class="s7">"My Analyzer"</span>, <span class="s6">Rect</span>(0, 0, 511, 300)); <span class="s8">// width should be 511</span></p>
  78 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>f = <span class="s6">SCFreqScope</span>(w, w.view.bounds);</p>
  79 <p class="p12"><span class="s3"><span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span>f.active_(</span><span class="s6">true</span><span class="s3">); <span class="Apple-tab-span">   </span></span>// turn it on the first time;</p>
  80 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span></p>
  81 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>w.onClose_({ f.kill }); <span class="s8">// you must have this</span></p>
  82 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>w.front;</p>
  83 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>{ <span class="s6">SinOsc</span>.ar([500, 1000], 0, 0.25).mean.dup }.play(s); <span class="s8">// start two sine waves</span></p>
  84 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span></p>
  85 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>)</p>
  86 <p class="p7"><br></p>
  87 <p class="p8"><b><span class="Apple-tab-span">  </span>*response (parent, bounds, bus1, bus2, freqMode)</b></p>
  88 <p class="p9"><b><span class="Apple-tab-span">  </span></b></p>
  89 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>Create a scope in a special frequency-response mode. This uses FFT-based spectral division to estimate the frequency response of some effect, on the assumption that the signal to <b>bus1</b> is transformed to the signal at <b>bus2</b> by some linear time-invariant process.</p>
  90 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>parent </b>- The parent view.</p>
  91 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>bounds </b>- An instance of <a href="../../Geometry/Rect.html"><span class="s9">Rect</span></a>, or a <a href="../../Geometry/Point.html"><span class="s9">Point</span></a> indicating width@height.</p>
  92 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>bus1</b> - The bus on which the "pre" signal is found.</p>
  93 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>bus2</b> - The bus on which the "post" signal is found.</p>
  94 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>freqMode</b> - linear (0) or log(1) frequency mode. Defaults to 1.</p>
  95 <p class="p7"><br></p>
  96 <p class="p13"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
  97 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s6">Server</span>.default = s = <span class="s6">Stethoscope</span>.defaultServer.boot;</p>
  98 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
  99 <p class="p12"><span class="s3"><span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></span>// basic usage. try these. Each one will open a new window</p>
 100 <p class="p12"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>// move the mouse left and right to test response in different ranges<span class="Apple-tab-span">       </span></p>
 101 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s6">LPF</span>.scopeResponse</p>
 102 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s6">HPF</span>.scopeResponse</p>
 103 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s6">MoogFF</span>.scopeResponse</p>
 104 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s6">BBandPass</span>.scopeResponse</p>
 105 <p class="p12"><span class="s3"><span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></span><span class="s6">BLowShelf</span><span class="s3">.scopeResponse </span>// by default BLowShelf doesn't mangle much</p>
 106 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s6">Resonz</span>.scopeResponse</p>
 107 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s6">BRF</span>.scopeResponse</p>
 108 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s6">Integrator</span>.scopeResponse</p>
 109 <p class="p12"><span class="s3"><span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></span><span class="s6">Median</span><span class="s3">.scopeResponse </span>// nonlinear, and therefore interesting</p>
 110 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span></p>
 111 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span></p>
 112 <p class="p12"><span class="s3"><span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></span>// customize the parameters for more informative scoping</p>
 113 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>{<span class="s6">|in|</span> <span class="s6">MoogFF</span>.ar(in, freq: <span class="s6">MouseX</span>.kr(10, 10000, 1),</p>
 114 <p class="p6"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>gain:<span class="s6">MouseY</span>.kr(4,0))}.scopeResponse</p>
 115 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span></p>
 116 <p class="p13"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
 117 <p class="p14"><b>Instance Methods</b></p>
 118 <p class="p15"><br></p>
 119 <p class="p8"><b><span class="Apple-tab-span">  </span>kill</b></p>
 120 <p class="p8"><b><span class="Apple-tab-span">  </span><span class="Apple-tab-span">    </span>Very important</b>. This must be run when the parent window is closed to avoid problems. It also frees the buffers that the scope allocated and stops the FFT analysis synth.</p>
 121 <p class="p9"><span class="Apple-tab-span">     </span></p>
 122 <p class="p8"><b><span class="Apple-tab-span">  </span>active</b></p>
 123 <p class="p8"><b><span class="Apple-tab-span">  </span>active_ (bool)</b></p>
 124 <p class="p9"><b><span class="Apple-tab-span">  </span></b></p>
 125 <p class="p8"><b><span class="Apple-tab-span">  </span><span class="Apple-tab-span">    </span></b>Turn the scope on or off.</p>
 126 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>bool </b>- An instance of Boolean.</p>
 127 <p class="p11"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
 128 <p class="p8"><b><span class="Apple-tab-span">  </span>freqMode</b></p>
 129 <p class="p8"><b><span class="Apple-tab-span">  </span>freqMode_ (mode)</b></p>
 130 <p class="p9"><b><span class="Apple-tab-span">  </span></b></p>
 131 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>mode </b>- 0= linear, 1= logarithmic.</p>
 132 <p class="p11"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
 133 <p class="p8"><b><span class="Apple-tab-span">  </span>inBus</b></p>
 134 <p class="p8"><b><span class="Apple-tab-span">  </span>inBus_ (num)</b></p>
 135 <p class="p9"><b><span class="Apple-tab-span">  </span></b></p>
 136 <p class="p8"><b><span class="Apple-tab-span">  </span><span class="Apple-tab-span">    </span></b>The bus to listen on.</p>
 137 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>num </b>- an audio <a href="../../ServerArchitecture/Bus.html"><span class="s2">Bus</span></a> number.</p>
 138 <p class="p9"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
 139 <p class="p8"><b><span class="Apple-tab-span">  </span>dbRange</b></p>
 140 <p class="p8"><b><span class="Apple-tab-span">  </span>dbRange_ (db)</b></p>
 141 <p class="p9"><b><span class="Apple-tab-span">  </span></b></p>
 142 <p class="p8"><b><span class="Apple-tab-span">  </span><span class="Apple-tab-span">    </span></b>Get/set the amplitude range.</p>
 143 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>db </b>- A <a href="../../Math/Number.html"><span class="s2">Number</span></a>.</p>
 144 <p class="p9"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
 145 <p class="p8"><b><span class="Apple-tab-span">  </span>special (defname, extraArgs)</b></p>
 146 <p class="p9"><b><span class="Apple-tab-span">  </span></b></p>
 147 <p class="p8"><b><span class="Apple-tab-span">  </span><span class="Apple-tab-span">    </span></b>Put the scope into a special mode using a user-specified <a href="../../ServerArchitecture/SynthDef.html"><span class="s10">SynthDef</span></a>. Note that only very particular SynthDefs should be used, namely ones that are derived from the <span class="s11">\</span><span class="s12">freqScope0</span> or <span class="s12">\freqScope1</span> SynthDefs. Most users will not need to use this method directly, but it can be used to provide a customised analysis shown in the scope.</p>
 148 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>defname </b>- Name of the SynthDef you wish to use.</p>
 149 <p class="p10"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><b>extraArgs </b>- extra arguments that you may wish to pass to the synth.</p>
 150 <p class="p9"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
 151 <p class="p14"><b>Subclassing and Internal Methods</b></p>
 152 <p class="p8"><span class="s13"><span class="Apple-tab-span">   </span></span>The following methods are usually not used directly or are called by a primitive. Programmers can still call or override these as needed.</p>
 153 <p class="p9"><span class="Apple-tab-span">     </span></p>
 154 <p class="p8"><b><span class="Apple-tab-span">  </span>*viewClass</b> Returns <span class="s14">SCScope</span>. See also Subclassing and Internal Methods in <a href="SCView.html"><span class="s2">SCView</span></a></p>
 155 <p class="p7"><br></p>
 156 <p class="p8"><b><span class="Apple-tab-span">  </span>*initClass</b> Sets the classVar , <b>server</b> = Server.internal.</p>
 157 <p class="p9"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span></p>
 158 <p class="p8"><b><span class="Apple-tab-span">  </span>server</b> - A classVar. must be Server.internal</p>
 159 <p class="p8"><b><span class="Apple-tab-span">  </span>start</b></p>
 160 <p class="p8"><b><span class="Apple-tab-span">  </span>eventSeq (delta, funcs)</b></p>
 161 <p class="p8"><b><span class="Apple-tab-span">  </span>cmdPeriod</b></p>
 162 <p class="p8"><b><span class="Apple-tab-span">  </span>initSCFreqScope</b></p>
 163 <p class="p8"><b><span class="Apple-tab-span">  </span>sendSynthDefs</b></p>
 164 <p class="p8"><b><span class="Apple-tab-span">  </span>allocBuffers</b></p>
 165 <p class="p8"><b><span class="Apple-tab-span">  </span>freeBuffers</b></p>
 166 <p class="p8"><b><span class="Apple-tab-span">  </span>node</b></p>
 167 <p class="p8"><b><span class="Apple-tab-span">  </span>scopebuf</b></p>
 168 <p class="p8"><b><span class="Apple-tab-span">  </span>fftbuf</b></p>
 169 <p class="p8"><b><span class="Apple-tab-span">  </span>bufSize</b></p>
 170 <p class="p9"><b><span class="Apple-tab-span">  </span></b></p>
 171 <p class="p14"><b>Examples</b></p>
 172 <p class="p2"><br></p>
 173 <p class="p12">// Start internal server</p>
 174 <p class="p6">s = <span class="s6">Server</span>.internal.boot;</p>
 175 <p class="p3"><br></p>
 176 <p class="p3"><br></p>
 177 <p class="p12">// Create analyzer in a window</p>
 178 <p class="p6">(</p>
 179 <p class="p6">w = <span class="s6">SCWindow</span>(<span class="s7">"My Analyzer"</span>, <span class="s6">Rect</span>(0, 0, 511, 300)); <span class="s8">// width should be 511</span></p>
 180 <p class="p6">f = <span class="s6">SCFreqScope</span>(w, w.view.bounds);</p>
 181 <p class="p12"><span class="s3">f.active_(</span><span class="s6">true</span><span class="s3">); <span class="Apple-tab-span">  </span></span>// turn it on the first time;</p>
 182 <p class="p3"><br></p>
 183 <p class="p6">w.onClose_({ f.kill }); <span class="s8">// you must have this</span></p>
 184 <p class="p6">w.front;</p>
 185 <p class="p6">{ <span class="s6">SinOsc</span>.ar([500, 1000], 0, 0.25).mean.dup }.play(s); <span class="s8">// start two sine waves</span></p>
 186 <p class="p3"><br></p>
 187 <p class="p6">)</p>
 188 <p class="p3"><br></p>
 189 <p class="p3"><br></p>
 190 <p class="p12"><span class="s3">f.freqMode_(1);<span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// change to log scale so we can see them</p>
 191 <p class="p12"><span class="s3">f.inBus_(1);<span class="Apple-tab-span">       </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// look at bus 1</p>
 192 <p class="p12"><span class="s3">f.dbRange_(200);<span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></span>// expand amplitude range</p>
 193 <p class="p12"><span class="s3">f.active_(</span><span class="s6">false</span><span class="s3">);<span class="Apple-tab-span">  </span><span class="Apple-tab-span">    </span></span>// turn scope off (watch CPU)</p>
 194 <p class="p12"><span class="s3">f.active_(</span><span class="s6">true</span><span class="s3">);<span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></span>// turn it back on<span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
 195 <p class="p3"><br></p>
 196 <p class="p3"><br></p>
 197 <p class="p12">// Now press command-period. The scope is still running.</p>
 198 <p class="p3"><br></p>
 199 <p class="p3"><br></p>
 200 <p class="p6">{ <span class="s6">Mix</span>.ar(<span class="s6">SinOsc</span>.ar([500, 1200, 3000, 9000,12000], 0, [0.2,0.1,0.05,0.03,0.01])) }.play(s); <span class="s8">// restart some sines</span></p>
 201 <p class="p3"><br></p>
 202 <p class="p3"><br></p>
 203 <p class="p12">// Close window and scope is killed.</p>
 204 <p class="p3"><br></p>
 205 <p class="p3"><br></p>
 206 <p class="p3"><br></p>
 207 <p class="p3"><br></p>
 208 <p class="p3"><br></p>
 209 <p class="p3"><br></p>
 210 <p class="p16"><br></p>
 211 </body>
 212 </html>