/usr/lib/pd/extra/rtc/VolAmb.pd is in pd-rtclib 4.1-2.
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 | #N canvas 64 76 290 234 10;
#X declare -lib libdir -lib cyclone;
#X obj 45 42 inlet;
#X obj 93 151 outlet;
#X obj 45 150 outlet;
#X obj 45 120 Table;
#C restore;
#X floatatom 45 70 0 0 0 0 - - -;
#X obj 93 120 Table;
#C restore;
#X obj 43 192 declare -lib libdir -lib cyclone;
#X connect 0 0 4 0;
#X connect 3 0 2 0;
#X connect 4 0 3 0;
#X connect 4 0 5 0;
#X connect 5 0 1 0;
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