/usr/lib/pd/extra/ggee/atan2~-help.pd is in pd-ggee 0.26-2.
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1 2 3 4 | #N canvas 197 203 500 184 10;
#X obj 33 88 atan2~;
#X text 30 121 (C) Guenter Geiger;
#X text 30 18 The atan2 function is used to get the phase from a imaginary value of the fft.;
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