/usr/lib/pd/extra/zexy/dfreq~-help.pd is in pd-zexy 2.2.6-2.
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#X obj 61 163 dfreq~;
#X obj 61 133 osc~ 440;
#X obj 61 231 print~;
#X msg 96 208 bang;
#X obj 85 28 dfreq~;
#X text 146 27 a frequency detector that counts zero-crossings;
#X floatatom 61 109 0 0 0 0 - - -;
#X text 182 104 every zero-crossing the frequency-estimation is updated
\, therefore this estimation is given as a signal...;
#X text 179 170 this detector won't work properly on complex signals
(e.g. zero-crossings should not be caused by higher partials);
#X text 177 205 on the other hand \, this is much cheaper than fft's
or fiddle...;
#X text 503 7 part of zexy;
#X text 183 265 thanks to w.ritsch for this one;
#N canvas 515 193 494 344 META 0;
#X text 12 125 HELP_PATCH_AUTHORS "pd meta" information added by Jonathan
Wilkes for Pd version 0.42.;
#X text 12 25 LICENSE GPL v2;
#X text 12 5 KEYWORDS signal analysis;
#X text 12 105 AUTHOR IOhannes m zmoelnig;
#X text 12 45 DESCRIPTION a frequency detector that counts zero-crossings
;
#X text 12 65 INLET_0 signal;
#X text 12 85 OUTLET_0 signal;
#X restore 540 272 pd META;
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