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#X text 12 105 LIBRARY internal;
#X text 12 145 WEBSITE http://crca.ucsd.edu/~msp/;
#X text 12 45 LICENSE SIBSD;
#X text 12 125 AUTHOR Miller Puckette;
#X text 12 185 HELP_PATCH_AUTHORS Updated for Pd version 0.4. Revised
by Jonathan Wilkes to conform to the PDDP template for Pd version 0.42.
;
#X text 12 65 DESCRIPTION block \, overlap \, and resampling control
for DSP;
#X text 12 85 INLET_0 set;
#X text 12 25 KEYWORDS signal block_oriented canvas_op;
#X text 12 165 RELEASE_DATE 2009;
#X text 12 5 ALIAS switch~;
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#X text 8 1 [block~] Related Objects;
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#X obj 455 20 pddp/pddplink http://wiki.puredata.info/en/block~ -text
pdpedia: block~;
#X text 98 280 set;
#X text 98 341 (none);
#X floatatom 78 247 0 0 0 0 - - -;
#X text 155 248 <- measured time (msec) between blocks;
#X text 161 49 block size 4096 \, no overlap \, no resampling;
#X text 162 71 bigger block size;
#X text 160 92 double overlap;
#X text 169 116 downsampled by factor of 2;
#X text 160 139 upsampled by factor of 2;
#X msg 78 50 set 4096 1 1;
#X msg 78 72 set 8192 1 1;
#X msg 78 94 set 4096 2 1;
#X msg 78 116 set 4096 1 0.5;
#X msg 78 138 set 4096 1 2;
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#X obj 22 42 block~ 1024 4;
#X text 19 64 This object specifies that DSP in this subwindow is to
be computed at a block size of 1024 \, and an overlap of 4 \, i.e.
\, every 256 samples. You may not (yet) specify a block size smaller
than your superpatch. This is useful for writing FFT based patches
(see the "fft examples" tutorial series.);
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#X text 7 1 [block~] A Simple Example;
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#X text 7 1 [block~]/[switch~] Interactions with Other PD Objects;
#X text 20 36 [dac~] and [adc~] don't work correctly if reblocked \,
nor if a parent window is reblocked \, even if the window containing
the [dac~] or [adc~] is reblocked back to the default block size and
sample rate.;
#X text 19 103 If using [send~] or [delwrite~] from a switched-off
patch \, the output of corresponding [receive~] and [delread~] objects
in other \, running patches will cycle old input (and sound like garbage).
[throw~] may be switched with impunity \, but not [catch~].;
#X text 21 184 Patches using [send~]/[receive~] or [throw~]/[catch~]
to intercommunicate must have the same blocking -- and if their parents
are blocked bigger than they are \, there might be weirdness.;
#X restore 102 555 pd block-interactions;
#X text 257 224 <- toggle display;
#X text 11 23 block \, overlap \, and resampling control for DSP;
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#X text 7 1 [block~] Bang every block;
#X text 10 347 This subpatch just triggers a series of bng objects
to display how different "set" messages change the block size.;
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#X obj 260 138 block~ 4096 1;
#X obj 49 63 bang~;
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#X obj 422 3 block~;
#X text 90 161 IMPORTANT NOTE: Since you may have at most one block~/switch~
object in any window \, [block~] has been put in a subpatch (below)
for this example:;
#X text 170 384 - blocksize.;
#X text 170 398 - (optional) overlap.;
#X text 170 411 - (optional) resampling factor (relative to super-patch).
;
#X text 80 398 2) float;
#X text 80 411 3) float;
#X text 168 280 - [block] has a single inlet that accepts a "set" message--
"set" followed by one to three floats-- that determines the block size
\, overlap \, and resampling for the window (see example above).;
#X text 80 384 1) float;
#X text 99 439 Pd's default block size is 64 samples. The [inlet~]
and [outlet~] objects reblock signals to adjust for differences between
parent and subpatch \, but only power-of-two adjustments are possible.
So for "normal" audio computations \, all blocks should also be power-of-two
in size. HOWEVER \, if you have no [inlet~] or [outlet~] you may specify
any other block size. This is intended for later use in video processing.
;
#X obj 4 597 pddp/pddplink all_about_help_patches.pd -text Usage Guide
;
#X obj 455 51 pddp/dsp;
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#X text 469 3 or [switch~];
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