/usr/lib/puredata/extra/complex-mod~-help.pd is in puredata-extra 0.46.2-1.
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 17 18 19 20 21 22 23 24 25 26 | #N canvas 136 85 600 480 12;
#X graph graph1 0 -1 882 1 279 209 579 39;
#X array mod-output 882 float;
#X pop;
#X msg 84 256 bang \; pd dsp 1;
#X floatatom 67 56;
#X obj 67 186 complex-mod~;
#X obj 67 84 phasor~ 440;
#X obj 67 115 cos~;
#X obj 106 138 cos~;
#X obj 106 114 -~ 0.25;
#X floatatom 145 152;
#X text 93 351 The complex modulator takes two signals in which it considers to be the real and imaginary part of a complex-valued signal. It then does a complex multiplication by a sinusoud to shift all frequencies up or down by any frequency shift in Hz. See also hilbert~.;
#X obj 69 298 tabwrite~ mod-output;
#X text 149 204 right outlet;
#X text 151 220 gives the other;
#X text 149 236 sideband;
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