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[sc-dev] SF.net SVN: supercollider:[8104] trunk/build/Help/Other Topics/ Tracing Processes.html

To: sc-dev@xxxxxxxxxxxxxxxx
Subject: [sc-dev] SF.net SVN: supercollider:[8104] trunk/build/Help/Other Topics/ Tracing Processes.html
From: jrhb@xxxxxxxxxxxxxxxxxxxxx
Date: Thu, 11 Dec 2008 16:29:52 +0000
List-id: SuperCollider developers mailing list <sc-devel.create.ucsb.edu>
Reply-to: sc-dev@xxxxxxxxxxxxxxxx
Sender: owner-sc-dev@xxxxxxxxxxxxxxxx
Revision: 8104
          http://supercollider.svn.sourceforge.net/supercollider/?rev=8104&view=rev
Author:   jrhb
Date:     2008-12-11 16:29:52 +0000 (Thu, 11 Dec 2008)

Log Message:
-----------
improved tutorial

Modified Paths:
--------------
    trunk/build/Help/Other Topics/Tracing Processes.html

Modified: trunk/build/Help/Other Topics/Tracing Processes.html
===================================================================
--- trunk/build/Help/Other Topics/Tracing Processes.html	2008-12-11 14:30:07 UTC (rev 8103)
+++ trunk/build/Help/Other Topics/Tracing Processes.html	2008-12-11 16:29:52 UTC (rev 8104)
@@ -13,17 +13,24 @@
 p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; color: #0021e7}
 p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Helvetica}
 p.p6 {margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Monaco; min-height: 17.0px}
-p.p7 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; color: #ad140d}
-p.p8 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco}
-p.p9 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; min-height: 12.0px}
-p.p10 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; color: #001bb9}
+p.p7 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; color: #bf0000}
+p.p8 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; color: #000000}
+p.p9 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; color: #000000; min-height: 12.0px}
+p.p10 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; min-height: 12.0px}
+p.p11 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco}
+p.p12 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; color: #0000bf}
+p.p13 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; color: #ad140d}
+p.p14 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; color: #001bb9}
 span.s1 {color: #000000}
 span.s2 {text-decoration: underline}
-span.s3 {color: #001bb9}
-span.s4 {color: #606060}
-span.s5 {color: #2c7014}
-span.s6 {color: #0024f8}
-span.s7 {color: #0000ff}
+span.s3 {color: #0000bf}
+span.s4 {color: #007300}
+span.s5 {color: #606060}
+span.s6 {color: #003eea}
+span.s7 {color: #0033f1}
+span.s8 {color: #001bb9}
+span.s9 {color: #002eaf}
+span.s10 {color: #0000ff}
 span.Apple-tab-span {white-space:pre}
 </style>
 </head>
@@ -41,49 +48,63 @@
 <p class="p7">// calculating the sum of n subsequent squares</p>
 <p class="p8">(</p>
 <p class="p8"><span class="s3">var</span> n = 8, x = 0;</p>
-<p class="p8">(1..n).do { <span class="s3">|num|</span> x = x + num.squared.postln };</p>
+<p class="p8">(1..n).do { <span class="s3">|num|</span> x = x + num.squared };</p>
 <p class="p8">x</p>
 <p class="p8">)</p>
 <p class="p9"><br></p>
+<p class="p7">// what happens while we are doing this?</p>
+<p class="p8">(</p>
+<p class="p8"><span class="s3">var</span> n = 8, x = 0;</p>
+<p class="p8"><span class="s1">(1..n)</span>.do { <span class="s3">|num|</span> x = x + num.squared.postln; };</p>
+<p class="p8">x</p>
+<p class="p8">)</p>
+<p class="p9"><br></p>
+<p class="p7">// or more in detail:</p>
+<p class="p8">(</p>
+<p class="p8"><span class="s3">var</span> n = 8, x = 0;</p>
+<p class="p8">(1..n).do { <span class="s3">|num|</span> [<span class="s4">\before</span>, x].postln; x = x + num.squared; [<span class="s4">\after</span>, x].postln;};</p>
+<p class="p8">x</p>
+<p class="p8">)</p>
+<p class="p10"><br></p>
+<p class="p10"><br></p>
 <p class="p7">// when posting several values, some more verbose posts can be useful.</p>
 <p class="p7">// postf formats a string and inserts values for %-characters.</p>
 <p class="p7">// here separate statements are needed.</p>
 <p class="p9"><br></p>
 <p class="p8">(</p>
 <p class="p8"><span class="s3">var</span> n = 8, x = 0;</p>
-<p class="p8">(1..n).do { <span class="s3">|num|</span> x = x + num.squared; <span class="s4">"x: % num: %\n"</span>.postf(x, num) };</p>
+<p class="p8">(1..n).do { <span class="s3">|num|</span> x = x + num.squared; <span class="s5">"num: % num-squared: % new x: %\n"</span>.postf(num, <span class="s1">num.squared, x</span>) };</p>
 <p class="p8">x</p>
 <p class="p8">)<span class="Apple-converted-space"> </span></p>
-<p class="p9"><br></p>
+<p class="p10"><br></p>
 <p class="p7">// in some cases, postln will only post part of the data, or a simplified</p>
 <p class="p7">// representation.</p>
 <p class="p9"><br></p>
-<p class="p7">// all numbers backwards from 200 to each num.</p>
+<p class="p7">// n times 200 random numbers</p>
 <p class="p7">// will just add ... etc ... after 123</p>
 <p class="p8">(</p>
 <p class="p8"><span class="s3">var</span> n = 3;</p>
-<p class="p8">(1..n).do { <span class="s3">|num|</span> (200..num).postln };</p>
+<p class="p8">(1..n).do { <span class="s3">|num|</span> { 1000.rand }.dup(200).postln };</p>
 <p class="p8">)</p>
-<p class="p9"><br></p>
-<p class="p7">// posts the compile string, i.e. the string needed to recreate the object</p>
+<p class="p10"><br></p>
+<p class="p7">// posts the compile string, i.e. the code needed to recreate the receiver (here the array)</p>
 <p class="p8">(</p>
-<p class="p8"><span class="s3">var</span> n = 8;</p>
-<p class="p8">(1..n).do { <span class="s3">|num|</span> (200..num).postcs };</p>
+<p class="p8"><span class="s3">var</span> n = 3;</p>
+<p class="p8">(1..n).do { <span class="s3">|num|</span> { num.rand }.dup(200).postcs };</p>
 <p class="p8">)</p>
 <p class="p9"><br></p>
 <p class="p9"><br></p>
 <p class="p7">// in streams, tasks and routines, this works just as well:</p>
 <p class="p8">(</p>
 <p class="p8">fork {<span class="Apple-tab-span">	</span></p>
-<p class="p8"><span class="Apple-tab-span">	</span><span class="s3">var</span> n = 4;</p>
+<p class="p8"><span class="Apple-tab-span">	</span><span class="s3">var</span> n = 14;</p>
 <p class="p8"><span class="Apple-tab-span">	</span>(1..n).do { <span class="s3">|num|</span><span class="Apple-converted-space"> </span></p>
-<p class="p8"><span class="Apple-tab-span">	</span><span class="Apple-tab-span">	</span>(200..num).postcs;</p>
+<p class="p11"><span class="s1"><span class="Apple-tab-span">	</span><span class="Apple-tab-span">	</span></span>{ num.rand }.dup(200).postcs;</p>
 <p class="p8"><span class="Apple-tab-span">	</span><span class="Apple-tab-span">	</span>1.wait;</p>
 <p class="p8"><span class="Apple-tab-span">	</span>};</p>
 <p class="p8">}</p>
 <p class="p8">)</p>
 <p class="p9"><br></p>
-<p class="p7">// in streams, tasks and routines, this works just as well:</p>
 <p class="p8">(</p>
 <p class="p8">fork {<span class="Apple-tab-span">	</span></p>
 <p class="p8"><span class="Apple-tab-span">	</span><span class="s3">var</span> str = <span class="s3">Routine</span> { <span class="s3">|in|</span> 10.do { in = in.rand.yield } };</p>
@@ -93,12 +114,12 @@
 <p class="p8"><span class="Apple-tab-span">	</span>};</p>
 <p class="p8">}</p>
 <p class="p8">)</p>
+<p class="p10"><br></p>
 <p class="p9"><br></p>
-<p class="p9"><br></p>
 <p class="p7">// for creating a pattern that once it is used posts its values,</p>
 <p class="p7">// the message trace can be used (in returns a Ptrace)</p>
 <p class="p9"><br></p>
-<p class="p8">a = <span class="s3">Pseq</span>([1, 4, 1, <span class="s3">Pwhite</span>(0, 6, 3), 100, 39], <span class="s3">inf</span>).trace(prefix: <span class="s4">"value: "</span>);</p>
+<p class="p8">a = <span class="s3">Pseq</span>([1, 4, 1, <span class="s3">Pwhite</span>(0, 6, 3), 100, 39], <span class="s3">inf</span>).trace(prefix: <span class="s5">"value: "</span>);</p>
 <p class="p8">b = a.asStream;</p>
 <p class="p8">b.next;</p>
 <p class="p8">b.next;</p>
@@ -107,29 +128,29 @@
 <p class="p9"><br></p>
 <p class="p7">// in a running stream:</p>
 <p class="p8">(</p>
-<p class="p10">Pbind<span class="s1">(</span></p>
-<p class="p8"><span class="Apple-tab-span">	</span><span class="s5">\degree</span>, <span class="s3">Pseq</span>([1, 4, 1, <span class="s3">Pwhite</span>(0, 6, 3), 100, 39], <span class="s3">inf</span>).trace(prefix: <span class="s4">"value: "</span>),</p>
-<p class="p8"><span class="Apple-tab-span">	</span><span class="s5">\dur</span>, 0.2</p>
+<p class="p12">Pbind<span class="s1">(</span></p>
+<p class="p8"><span class="Apple-tab-span">	</span><span class="s4">\degree</span>, <span class="s3">Pseq</span>([1, 4, 1, <span class="s3">Pwhite</span>(0, 6, 3), 100, 39], <span class="s3">inf</span>).trace(prefix: <span class="s5">"value: "</span>),</p>
+<p class="p8"><span class="Apple-tab-span">	</span><span class="s4">\dur</span>, 0.2</p>
 <p class="p8">).play</p>
 <p class="p8">);</p>
 <p class="p9"><br></p>
 <p class="p7">// post only a slot of the events</p>
 <p class="p8">(</p>
-<p class="p10">Pbind<span class="s1">(</span></p>
-<p class="p8"><span class="Apple-tab-span">	</span><span class="s5">\degree</span>, <span class="s3">Pseq</span>([1, 4, 1, <span class="s3">Pwhite</span>(0, 6, 3), 100, 39], <span class="s3">inf</span>),</p>
-<p class="p8"><span class="Apple-tab-span">	</span><span class="s5">\dur</span>, 0.2</p>
-<p class="p8">).trace(<span class="s5">\degree</span>).play</p>
+<p class="p12">Pbind<span class="s1">(</span></p>
+<p class="p8"><span class="Apple-tab-span">	</span><span class="s4">\degree</span>, <span class="s3">Pseq</span>([1, 4, 1, <span class="s3">Pwhite</span>(0, 6, 3), 100, 39], <span class="s3">inf</span>),</p>
+<p class="p8"><span class="Apple-tab-span">	</span><span class="s4">\dur</span>, 0.2</p>
+<p class="p8">).trace(<span class="s4">\degree</span>).play</p>
 <p class="p8">);</p>
-<p class="p9"><br></p>
+<p class="p6"><br></p>
+<p class="p7">// several slots at once:</p>
 <p class="p8">(</p>
-<p class="p10">Pbind<span class="s1">(</span></p>
-<p class="p8"><span class="Apple-tab-span">	</span><span class="s5">\degree</span>, <span class="s3">Pseq</span>([1, 4, 1, <span class="s3">Pwhite</span>(0, 6, 3), 100, 39], <span class="s3">inf</span>),</p>
-<p class="p8"><span class="Apple-tab-span">	</span><span class="s5">\dur</span>, 0.2</p>
-<p class="p8">).trace(<span class="s5">\freq</span>).play</p>
+<p class="p12">Pbind<span class="s1">(</span></p>
+<p class="p8"><span class="Apple-tab-span">	</span><span class="s4">\degree</span>, <span class="s3">Pseq</span>([1, 4, 1, <span class="s3">Pwhite</span>(0, 6, 3), 100, 39], <span class="s3">inf</span>),</p>
+<p class="p8"><span class="Apple-tab-span">	</span><span class="s4">\dur</span>, <span class="s3">Pwhite</span>(0.2, 0.4, <span class="s3">inf</span>)</p>
+<p class="p8">).trace([<span class="s4">\degree</span>, <span class="s4">\dur</span>], prefix: [<span class="s5">"degree "</span>, <span class="s5">"dur "</span>]).play</p>
 <p class="p8">);</p>
 <p class="p6"><br></p>
 <p class="p6"><br></p>
-<p class="p6"><br></p>
 <p class="p2"><br></p>
 <p class="p5"><b>Tracing server processes:</b></p>
 <p class="p6"><br></p>
@@ -142,19 +163,36 @@
 <p class="p8">{ <span class="s3">SinOsc</span>.ar(<span class="s3">SinOsc</span>.kr(0.2, 0, 300, 400).poll) * 0.1 }.play;</p>
 <p class="p9"><br></p>
 <p class="p7">// using a label:</p>
-<p class="p8">{ <span class="s3">SinOsc</span>.ar(<span class="s3">SinOsc</span>.kr(0.2, 0, 300, 400).poll(label: <span class="s4">"freq"</span>)) * 0.1 }.play;</p>
+<p class="p8">{ <span class="s3">SinOsc</span>.ar(<span class="s3">SinOsc</span>.kr(0.2, 0, 300, 400).poll(label: <span class="s5">"freq"</span>)) * 0.1 }.play;</p>
 <p class="p6"><br></p>
 <p class="p6"><br></p>
 <p class="p3">For <b>demand ugens</b>, poll does not work - these ugens are called by a Demand or Duty Ugen at certain intervals. The message dpoll creates a Dpoll ugen that posts when they are called (see <a href="../UGens/Synth control/Demand Rate/Dpoll.html"><span class="s6">Dpoll</span></a> helpfile)</p>
 <p class="p6"><br></p>
-<p class="p9"><br></p>
+<p class="p10"><br></p>
 <p class="p8">{ <span class="s3">SinOsc</span>.ar(<span class="s3">Duty</span>.kr(0.5, 0, (<span class="s3">Dseries</span>(0, 1, <span class="s3">inf</span>) * 200 + 300).dpoll)) * 0.1 }.play;</p>
 <p class="p9"><br></p>
-<p class="p8">{ <span class="s3">SinOsc</span>.ar(<span class="s3">Duty</span>.kr(0.5, 0, (<span class="s3">Dseries</span>(0, 1, <span class="s3">inf</span>) * 200 + 300).dpoll(label: <span class="s4">"freq"</span>))) * 0.1 }.play;</p>
-<p class="p9"><br></p>
+<p class="p8">{ <span class="s3">SinOsc</span>.ar(<span class="s3">Duty</span>.kr(0.5, 0, (<span class="s3">Dseries</span>(0, 1, <span class="s3">inf</span>) * 200 + 300).dpoll(label: <span class="s5">"freq"</span>))) * 0.1 }.play;</p>
+<p class="p10"><br></p>
 <p class="p6"><br></p>
 <p class="p3">When using the internal server (see <a href="../ServerArchitecture/Server.html"><span class="s7">Server</span></a> help), the <b>scope</b> window can give valuable information about the ongoing sound (see <a href="../GUI/Stethoscope.html"><span class="s7">Stethoscope</span></a> help):</p>
 <p class="p6"><br></p>
-<p class="p8">{ <span class="s3">SinOsc</span>.ar(<span class="s3">SinOsc</span>.kr(0.2, 0, 300, 400)) * 0.1 }.scope;</p>
+<p class="p13">// must use internal server</p>
+<p class="p11">s = <span class="s8">Server</span>.internal.boot;</p>
+<p class="p11">{ <span class="s9">SinOsc</span>.ar(<span class="s9">SinOsc</span>.kr(0.2, 0, 300, 400)) * 0.1 }.scope;</p>
+<p class="p10"><br></p>
+<p class="p3">A <a href="../GUI/FreqScope.html"><span class="s10">FreqScope</span></a> window can be used for observing the spectrum of the output:</p>
+<p class="p10"><br></p>
+<p class="p13">// must use internal server</p>
+<p class="p8"><span class="s3">Server</span>.default = s = <span class="s3">Server</span>.internal.boot;</p>
+<p class="p10"><span class="Apple-tab-span">	</span><span class="Apple-tab-span">	</span></p>
+<p class="p13">// create a new analyzer</p>
+<p class="p14">FreqScope<span class="s1">.new;</span></p>
+<p class="p10"><br></p>
+<p class="p11">{ <span class="s9">SinOsc</span>.ar(<span class="s9">SinOsc</span>.ar(0.2, 0, 3000, 4000)) * 0.1 }.play;</p>
+<p class="p11">{ <span class="s9">SinOsc</span>.ar(<span class="s9">SinOsc</span>.ar((1..4) * 0.02, 0, 3000, 4000)).sum * 0.1 }.play;</p>
+<p class="p10"><br></p>
+<p class="p10"><br></p>
+<p class="p10"><br></p>
+<p class="p10"><br></p>
 </body>
 </html>


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