/usr/lib/pd/extra/puremapping/upsample-help.pd is in pd-puremapping 20160130-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | #N canvas 355 237 367 339 10;
#X msg 82 101 1;
#X obj 84 226 print;
#X obj 204 227 print ---------;
#X text 79 77 increase the sampling rate;
#X obj 83 140 trigger float bang;
#X obj 98 119 hsl 128 15 0 127 0 0 empty empty empty -2 -6 0 8 -262144
-1 -1 2600 1;
#X obj 83 200 upsample 3;
#X obj 158 177 hsl 128 15 0 10 0 0 empty empty empty -2 -6 0 8 -262144
-1 -1 4100 1;
#X floatatom 162 201 5 0 0 0 - - -;
#X connect 0 0 4 0;
#X connect 4 0 6 0;
#X connect 4 1 2 0;
#X connect 5 0 4 0;
#X connect 6 0 1 0;
#X connect 7 0 6 1;
#X connect 7 0 8 0;
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