/usr/lib/pd/extra/ggee/bandpass-help.pd is in pd-ggee 0.26-4.
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 | #N canvas 92 30 461 436 10;
#X text 63 298 These filters are all controlled by a bandwidth which
is expressed in octaves. A bandwidth of 100 is equivalent to one octave.
;
#X text 76 12 Bandpass coefficients for biquad~;
#X text 70 26 ===================================;
#X text 63 340 Attention \, only the left inlet triggers new coefficients
for biquad~;
#X text 8 388 (C) Guenter Geiger 2000;
#X floatatom 176 119 0 0 0 0 - - -;
#X floatatom 267 119 0 0 0 0 - - -;
#X obj 267 142 trigger bang float;
#X obj 113 216 biquad~;
#X obj 113 156 noise~;
#X obj 102 258 dac~;
#X obj 179 74 hsl 128 17 20 20000 1 0 empty empty frequency 5 9 0 10
-203904 -1 -1 0 0;
#X obj 270 97 hsl 128 17 0 100 0 0 empty empty bandwidth 5 9 0 10 -261682
-1 -1 0 1;
#X obj 176 185 bandpass;
#X connect 5 0 13 0;
#X connect 6 0 7 0;
#X connect 7 0 13 0;
#X connect 7 1 13 1;
#X connect 8 0 10 1;
#X connect 8 0 10 0;
#X connect 9 0 8 0;
#X connect 11 0 5 0;
#X connect 12 0 6 0;
#X connect 13 0 8 0;
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