/usr/share/puredata/doc/5.reference/metro-help.pd is in puredata-core 0.48.1-3.
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 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | #N canvas 19 47 635 576 12;
#X obj 32 291 metro 500;
#X obj 70 9 metro;
#X floatatom 101 268 4 0 0 0 - - -, f 4;
#X msg 32 125 1;
#X text 92 135 nonzero number or "bang" to start;
#X msg 49 172 0;
#X msg 38 148 bang;
#X msg 49 194 stop;
#X text 121 8 - metronome;
#X text 23 35 The metro object sends a series of bangs at regular time
intervals. The right inlet takes the value in milliseconds between
each bang. The left inlet takes a 1 or 0 \, turning the metronome on
or off.;
#X obj 32 317 bng 25 250 50 0 empty empty empty 17 7 0 10 -262144 -1
-1;
#X text 116 292 <-- optional creation arguments:;
#X text 165 311 - delay time (float);
#X text 166 329 - tempo (float) and time unit (symbol) as in "tempo"
message, f 31;
#X msg 51 220 tempo 2 msec;
#X text 69 502 see also:;
#X obj 163 500 timer;
#X obj 330 460 metro 1 120 permin;
#X obj 330 384 tgl 20 0 empty empty empty 17 7 0 10 -262144 -1 -1 0
1;
#X obj 330 485 bng 25 250 50 0 empty empty empty 17 7 0 10 -262144
-1 -1;
#X obj 210 465 delay;
#X text 347 531 Updated for Pd version 0.48;
#X text 99 181 zero or "stop" to stop;
#X obj 493 436 /;
#X msg 493 411 1 \$1;
#X msg 493 380 0.5;
#X msg 529 380 1;
#X msg 565 380 4;
#X text 524 437 beat length;
#X msg 369 409 tempo \$1 permin;
#X floatatom 369 384 5 0 0 0 - - -, f 5;
#X text 165 219 set tempo in units of milliseconds (msec for short)
\, seconds (sec) \, minutes (min) or samples (samp), f 51;
#X text 150 268 right inlet sets the rate in msec per tick or tempo
unit length, f 64;
#X text 40 458 for details on tempo setting \, see:, f 20;
#X text 41 403 for example \, a metronome at intervals of one beat
at 120 beats per minute:, f 37;
#X connect 0 0 10 0;
#X connect 2 0 0 1;
#X connect 3 0 0 0;
#X connect 5 0 0 0;
#X connect 6 0 0 0;
#X connect 7 0 0 0;
#X connect 14 0 0 0;
#X connect 17 0 19 0;
#X connect 18 0 17 0;
#X connect 23 0 17 1;
#X connect 24 0 23 0;
#X connect 25 0 24 0;
#X connect 26 0 24 0;
#X connect 27 0 24 0;
#X connect 29 0 17 0;
#X connect 30 0 29 0;
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