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#N canvas 451 128 556 360 12;
#X obj 117 129 biquad~ 0.83774 -0.06338 0.06338 -0.83774 1;
#X obj 117 103 biquad~ 1.94632 -0.94657 0.94657 -1.94632 1;
#X obj 98 186 biquad~ -0.02569 0.260502 -0.260502 0.02569 1;
#X obj 98 212 biquad~ 1.8685 -0.870686 0.870686 -1.8685 1;
#X obj 98 76 inlet~;
#X obj 117 158 outlet~;
#X obj 98 239 outlet~;
#X text 105 273 This is a pair of all-pass filters whose outputs somehow manage to be about 90 degrees out of phase from each other. I don't know what phase relation they have with the original signal. I adapted this from a 4X patch by Emmanuel Favreau \, circa 1982;
#X connect 0 0 5 0;
#X connect 1 0 0 0;
#X connect 2 0 3 0;
#X connect 3 0 6 0;
#X connect 4 0 1 0;
#X connect 4 0 2 0;
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