This file is indexed.

/usr/lib/pd/extra/windowing/welch~-help.pd is in pd-windowing 0.1-4.

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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
#N canvas 256 141 560 517 10;
#X obj 4 479 cnv 15 550 20 empty \$0-pddp.cnv.footer empty 20 12 0
14 -228856 -66577 0;
#X obj 4 -17 cnv 15 550 40 empty \$0-pddp.cnv.header welch~ 3 12 0
18 -204280 -1 0;
#X obj 3 239 cnv 3 550 3 empty \$0-pddp.cnv.inlets inlets 15 12 0 13
-228856 -1 0;
#X obj 3 299 cnv 3 550 3 empty \$0-pddp.cnv.outlets outlet 15 12 0
13 -228856 -1 0;
#X obj 3 359 cnv 3 550 3 empty \$0-pddp.cnv.more_info more_info 15
12 0 13 -228856 -1 0;
#X obj 72 259 cnv 17 3 30 empty \$0-pddp.cnv.let.0 0 5 9 0 16 -228856
-162280 0;
#X text 168 40 formula:;
#X obj 97 86 hsl 71 15 -1 1 0 0 empty empty empty -2 -6 0 10 -262144
-1 -1 7000 1;
#X msg 94 66 1;
#X obj 94 46 loadbang;
#X obj 102 365 pddp/pddplink http://en.wikipedia.org/wiki/Window_function
-text wikipedia: window functions;
#X obj 438 -14 import windowing;
#X msg 36 154 \; pd dsp 1;
#X text 21 85 height --->;
#X obj 127 109 sig~ 1;
#N canvas 0 0 450 300 graph3 0;
#X array \$0-welch 64 float 0;
#X coords 0 1 63 -1 200 140 1;
#X restore 326 65 graph;
#X text 102 406 Windowing functions are used with FFTs. These transform
the signal block-by-block into a spectral representation whose resolution
in both the frequency and time domains are proportional to their size
(as a power-of-two in PD). The different windows have different characteristics
in terms of stopband attenuation and noise bandwidth.;
#X text 102 258 SIGNAL: the height (amplitude) of the window is controlled
by the signal on its inlet.;
#X obj 127 158 tabsend~ \$0-welch;
#X obj 127 132 welch~;
#X text 169 53 1-abs(x);
#X obj 102 379 pddp/pddplink http://en.wikipedia.org/wiki/Welch_method
-text wikipedia: Welch's method;
#X obj 102 392 pddp/pddplink http://mathworld.wolfram.com/WelchApodizationFunction.html
-text mathworld link;
#X text 103 317 SIGNAL: a welch window with size=dsp blocksize;
#X text 15 6 description: generates a welch window for each dsp block
;
#X obj 435 6 pddp/pddplink http://wiki.puredata.info/en/welch~ -text
pdpedia: welch~;
#X obj 73 319 cnv 17 3 30 empty \$0-pddp.cnv.let.0 0 5 9 0 16 -228856
-162280 0;
#X connect 7 0 14 0;
#X connect 8 0 7 0;
#X connect 9 0 8 0;
#X connect 14 0 19 0;
#X connect 19 0 18 0;