/usr/lib/pd/extra/iemlib/lp7_cheb~.pd is in pd-iemlib 1.20.1-1.
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 32 33 34 35 36 37 | #N canvas 350 22 429 309 10;
#X obj 22 42 inlet~;
#X obj 58 66 inlet;
#X obj 22 230 outlet~;
#X text 62 42 ~signal_in~;
#X text 95 67 <float> cutoff_frequency [Hz];
#X text 201 86 <float> interpolation_time [ms];
#X text 29 186 ~filtered signal_out~;
#X obj 167 86 inlet;
#X text 142 17 and +1 dB passband-ripple;
#X text 86 205 1.arg: <float> cutoff_frequency [Hz];
#X text 86 215 2.arg: <float> interpolation_time [ms] (opt.);
#X text 5 5 lp7_cheb~;
#X text 81 5 lowpass 7.order with chebyshev characteristic;
#X obj 22 107 lp2c~ \$1 0.0937 1.0423 \$2;
#X obj 22 127 lp2c~ \$1 0.3987 1.5834 \$2;
#X obj 22 148 lp2c~ \$1 1.6338 4.4899 \$2;
#X obj 22 168 lp1c~ \$1 4.952 \$2;
#X text 176 265 IEM KUG;
#X text 160 253 musil;
#X text 190 253 @;
#X text 196 253 iem.at;
#X text 111 242 (c) Thomas Musil 2000 - 2005;
#X text 159 275 Graz \, Austria;
#X connect 0 0 13 0;
#X connect 1 0 13 1;
#X connect 7 0 13 4;
#X connect 13 0 14 0;
#X connect 13 1 14 1;
#X connect 13 4 14 4;
#X connect 14 0 15 0;
#X connect 14 1 15 1;
#X connect 14 4 15 4;
#X connect 15 0 16 0;
#X connect 15 1 16 1;
#X connect 15 4 16 4;
#X connect 16 0 2 0;
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