/usr/lib/pd/extra/zexy/unpack~-help.pd is in pd-zexy 2.2.5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#X text 460 14 see also;
#X obj 461 33 pack~;
#X text 147 40 unpack~;
#X text 178 65 convert float-packages to signals;
#X obj 85 132 unpack~ 512;
#X text 234 156 creation: "unpack~ [<bufsize>]";
#X text 255 181 <bufsize>: in samples (defaults to 64) \; could be
fine if you don't have a constant stream of floats;
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#X floatatom 69 50 0 0 0 0 - - -;
#X text 74 6 a simple samplerate-reducer;
#X text 116 129 samplerate = 44.1kHz;
#X text 126 205 samplerate = 5.5125kHz;
#X text 108 303 reconstructed signal @ 44.1kHz;
#X msg 69 223 \$1 \$1 \$1 \$1 \$1 \$1 \$1 \$1;
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#X msg 349 179 \; pd dsp 1;
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#X msg 418 91 MUTE;
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#X text 199 18 level;
#X msg 96 65 set \$1;
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#X msg 214 64 \; pd dsp 1;
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#X text 20 158 audio;
#X text 93 110 show level;
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#X restore 85 249 pd example;
#X text 530 34 part of zexy;
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#X text 12 125 HELP_PATCH_AUTHORS "pd meta" information added by Jonathan
Wilkes for Pd version 0.42.;
#X text 12 25 LICENSE GPL v2;
#X text 12 105 AUTHOR IOhannes m zmoelnig;
#X text 12 5 KEYWORDS signal conversion list_op;
#X text 12 45 DESCRIPTION convert a list of floats to a signal;
#X text 12 65 INLET_0 list;
#X text 12 85 OUTLET_0 signal;
#X restore 614 264 pd META;
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