/usr/share/puredata/doc/5.reference/hip~-help.pd is in puredata-core 0.46.7-3.
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 38 39 | #N canvas 394 118 644 497 12;
#X obj 76 238 env~;
#X floatatom 76 261 0 0 0 0 - - -;
#X floatatom 120 184 0 0 0 0 - - -;
#X obj 76 211 hip~ 5;
#X obj 18 238 env~;
#X floatatom 18 260 0 0 0 0 - - -;
#X text 121 240 env~ gives the amplitude of the signal envelop in dB.
;
#X floatatom 18 112 0 0 0 0 - - -;
#X obj 18 135 osc~ 100;
#X text 69 112 <-- scroll to change input frequency;
#X msg 76 159 clear;
#X text 128 158 <-- reinitialize internal state;
#X obj 83 6 hip~;
#X text 128 5 - one-pole high pass filter;
#X text 409 464 updated for Pd version 0.44;
#X msg 127 439 \; pd compatibility 0.43;
#X text 11 31 hip~ is a one-pole high pass filter with a specified
cutoff frequency.;
#X text 141 213 Creation argument initializes cutoff frequency.;
#X text 172 183 <-- set cutoff frequency;
#X text 13 68 Left (audio) inlet is the incoming audio signal.;
#X text 12 87 Right (contol) inlet sets cutoff frequency.;
#X text 21 293 COMPATIBILITY NOTE: in Pd versions before 0.44 \, the
high-frequency output gain was incorrectly greater than one (usually
only slightly so \, but noticeably if the cutoff frequency was more
than 1/4 the Nyquist frequency). This problem was fixed INCORECTLY
in pd 0.44-0 thoguh 0.44-2 \, and is now hopefully fixed since Pd 0.44-3.
To get the old (0.43 and earlier) behavior \, set "compatibility" to
0.43 in Pd's command line or by a message:;
#X connect 0 0 1 0;
#X connect 2 0 3 1;
#X connect 3 0 0 0;
#X connect 4 0 5 0;
#X connect 7 0 8 0;
#X connect 8 0 4 0;
#X connect 8 0 3 0;
#X connect 10 0 3 0;
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