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<H1><A NAME="SECTION00750000000000000000">
Control streams in block diagrams</A>
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<P>
<DIV ALIGN="CENTER"><A NAME="fig03.06"></A><A NAME="3627"></A>
<TABLE>
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 3.6:</STRONG>
Conversion between control and audio: (a) control to signal; (b)
signal to control by snapshots.</CAPTION>
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WIDTH="346" HEIGHT="160" BORDER="0"
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ALT="\begin{figure}\psfig{file=figs/fig03.06.ps}\end{figure}"></TD></TR>
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<P>
Figure <A HREF="#fig03.06">3.6</A> shows how control streams are expressed in block diagrams,
using control-to-signal and signal-to-control conversion as examples. Control
streams are represented using dots (as opposed to audio signals which appear
as solid arrows).
<P>
The <I>signal</I> block converts from a numeric control stream to an audio
signal. The exact type of conversion isn't specified at this level of
detail; in the Pd examples the choice of conversion operator
will determine this.
<P>
The <I>snapshot</I> block converts from audio signals back to numeric
control streams. In addition to the audio signal, a separate, control input
is needed to specify the time sequence at which the audio signal is sampled.
<P>
<BR><HR>
<ADDRESS>
Miller Puckette
2006-12-30
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