replace in opening quotations
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node19.html
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node19.html
@@ -73,7 +73,7 @@ Constant amplitude scaler</A>
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Example A01.sinewave.pd, shown in Figure <A HREF="#fig01.11">1.11</A>, contains essentially the
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simplest possible patch that makes a sound,
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with only three object boxes. (There are also comments, and two message
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boxes to turn Pd's ``DSP" (audio) processing on and off.) The three object boxes
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boxes to turn Pd's "DSP" (audio) processing on and off.) The three object boxes
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are:
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<P>
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@@ -144,20 +144,20 @@ consult the Pd documentation for details.
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<P>
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The two message boxes show a peculiarity in the way messages are parsed in
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message boxes. Earlier in Figure <A HREF="node16.html#fig01.10">1.10</A> (part a), the message
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consisted only of the number 21. When clicked, that box sent the message ``21"
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consisted only of the number 21. When clicked, that box sent the message "21"
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to its outlet and hence to any objects connected to it. In this current
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example, the text of the message boxes starts with a semicolon. This is a
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terminator between messages (so the first message is empty), after which the
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next word is taken as the name of the recipient of the following message. Thus
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the message here is ``dsp 1" (or ``dsp 0") and the message is to be sent, not
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the message here is "dsp 1" (or "dsp 0") and the message is to be sent, not
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to any connected objects--there aren't any anyway--but rather, to the object
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named ``pd". This particular object is provided invisibly by the Pd program
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named "pd". This particular object is provided invisibly by the Pd program
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and you can send it various messages to control Pd's global state, in this case
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turning audio processing on (``1") and off (``0").
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turning audio processing on ("1") and off ("0").
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<P>
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Many more details about the control aspects of Pd, such as the above, are
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explained in a different series of example patches (the ``control examples") in
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explained in a different series of example patches (the "control examples") in
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the Pd release, but they will only be touched on here as necessary to
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demonstrate the audio signal processing techniques that are the subject of this
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book.
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