/usr/lib/pd/extra/cyclone/poltocar~-help.pd is in pd-cyclone 0.1~alpha55-3.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | #N canvas 1382 212 440 290 10;
#X text 15 35 Polar to cartesian coordinate conversion.;
#X text 113 151 phase (in 271 radians);
#X obj 64 234 ifft~ 256 256 0;
#X obj 64 210 poltocar~;
#X obj 64 135 cartopol~;
#X obj 64 112 fft~ 256 256 0;
#X text 44 151 amp.;
#X text 61 77 Here's how to connect it to an fft~:;
#X text 115 177 <- do some spectral processing here;
#X connect 3 0 2 0;
#X connect 3 1 2 1;
#X connect 4 0 3 0;
#X connect 4 1 3 1;
#X connect 5 0 4 0;
#X connect 5 1 4 1;
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