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Lucas Cordiviola
2022-04-12 23:17:03 -03:00
parent 1ca5c25706
commit 19822c017f
89 changed files with 282 additions and 282 deletions
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node23.html
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@@ -71,7 +71,7 @@ Conversion between frequency and pitch</A>
<P>
Example A06.frequency.pd&nbsp; (Figure <A HREF="#fig01.13">1.13</A>) shows Pd's object for converting
pitch to frequency units (<TT>mtof</TT>, meaning ``MIDI to frequency") and its
pitch to frequency units (<TT>mtof</TT>, meaning "MIDI to frequency") and its
inverse <TT>ftom</TT>. We also introduce two other object classes,
<TT>send</TT> and <TT>receive</TT>.
@@ -105,7 +105,7 @@ Conversion between pitch and frequency in A06.frequency.pd.</CAPTION>
<A NAME="1405"></A><A NAME="1406"></A>convert MIDI pitch to frequency units according to the
Pitch/Frequency Conversion Formulas (Page <A HREF="node11.html#eq-pitchmidi"><IMG ALIGN="BOTTOM" BORDER="1" ALT="[*]"
SRC="crossref.png"></A>). Inputs
and outputs are messages (``tilde" equivalents of the two also exist,
and outputs are messages ("tilde" equivalents of the two also exist,
although like <TT>dbtorms~</TT> they're expensive in CPU time).
The <TT>ftom</TT> object's output is -1500
if the input is zero or negative; and likewise, if you give <TT>mtof</TT> -1500 or lower it outputs zero.
@@ -125,11 +125,11 @@ if the input is zero or negative; and likewise, if you give <TT>mtof</TT> -1500
SRC="img157.png"
ALT="\fbox{ $ \mathrm{r} $}">:
<A NAME="1407"></A><A NAME="1408"></A>Receive messages non-locally.
The <TT>receive</TT> object, which may be abbreviated as ``<TT>r</TT>",
The <TT>receive</TT> object, which may be abbreviated as "<TT>r</TT>",
waits for non-local messages to be sent by a <TT>send</TT> object (described below)
or
by a message box using redirection (the ``;" feature discussed in the
earlier example, A01.sinewave.pd). The argument (such as ``frequency" and ``pitch"
by a message box using redirection (the ";" feature discussed in the
earlier example, A01.sinewave.pd). The argument (such as "frequency" and "pitch"
in this example) is the name to which messages are sent. Multiple
<TT>receive</TT> objects may share the same name, in which case any message
sent to that name will go to all of them.
@@ -148,7 +148,7 @@ sent to that name will go to all of them.
WIDTH="31" HEIGHT="33" ALIGN="MIDDLE" BORDER="0"
SRC="img159.png"
ALT="\fbox{ $\mathrm{s}$\ }">:
<A NAME="1409"></A><A NAME="1410"></A>The <TT>send</TT> object, which may be abbreviated as ``<TT>s</TT>", directs
<A NAME="1409"></A><A NAME="1410"></A>The <TT>send</TT> object, which may be abbreviated as "<TT>s</TT>", directs
messages to <TT>receive</TT> objects.
<P>
@@ -156,11 +156,11 @@ Two new properties of number boxes are used here. Earlier we've used them
as controls or as displays; here, the two number boxes each function as both.
If a number box gets a number in its inlet, it not only displays the number
but also repeats the number to its output. However, a number box may also be sent
a ``set" message, such as ``set 55" for example. This would set the value
a "set" message, such as "set 55" for example. This would set the value
of the number box to 55 (and display it) but not cause the output that would
result from the simple ``55" message. In this case, numbers coming from the
two <TT>receive</TT> objects are formatted (using message boxes) to read ``set 55" instead
of just ``55", and so on. (The special word ``$1" is replaced by the
result from the simple "55" message. In this case, numbers coming from the
two <TT>receive</TT> objects are formatted (using message boxes) to read "set 55" instead
of just "55", and so on. (The special word "$1" is replaced by the
incoming number.) This is done because otherwise we would have an infinite
loop: frequency would change pitch which would change frequency and so on
forever, or at least until something broke.