/usr/lib/pd/extra/rtc/cresc-decresc-help.pd is in pd-rtclib 4.1-1.
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 20 21 22 23 24 25 26 27 28 29 30 31 | #N canvas 172 121 524 498 10;
#X text 29 68 Transition between a start velocity and an end velocity
within a certain time. When the start velocity is bigger than the end
velocity \, a decrescendo will be obtained. If the end velocity is
bigger than the start velocity \, it will result in a crescendo. A
bang is sent out the right outlet when the dynamic transition is over.
;
#X text 29 36 cresc-decresc;
#X floatatom 150 204 0 0 0 0 - - -;
#X obj 93 194 tgl 15 0 empty empty start/stop 0 -6 0 8 -262144 -1 -1
0 1;
#X obj 93 231 metro 150;
#X floatatom 257 216 0 0 0 2 start_velocity - -;
#X floatatom 257 250 0 0 0 2 end_velocity - -;
#X floatatom 256 288 0 0 0 2 time - -;
#X msg 93 166 0;
#X floatatom 93 348 4 0 0 1 velocity - -;
#X text 59 414 1993 by Karlheinz Essl;
#X obj 256 345 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X obj 93 310 cresc-decresc 1 127 5000;
#X connect 2 0 4 1;
#X connect 3 0 4 0;
#X connect 4 0 12 0;
#X connect 5 0 12 1;
#X connect 6 0 12 2;
#X connect 7 0 12 3;
#X connect 8 0 3 0;
#X connect 12 0 9 0;
#X connect 12 1 8 0;
#X connect 12 1 11 0;
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