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#N canvas 269 0 593 306 12;
#X obj 113 68 biquad~ 0.83774 -0.06338 0.06338 -0.83774 1;
#X obj 113 42 biquad~ 1.94632 -0.94657 0.94657 -1.94632 1;
#X obj 94 125 biquad~ -0.02569 0.260502 -0.260502 0.02569 1;
#X obj 94 151 biquad~ 1.8685 -0.870686 0.870686 -1.8685 1;
#X obj 94 15 inlet~;
#X obj 113 97 outlet~;
#X obj 94 178 outlet~;
#X text 32 210 This is a pair of 4th-order all-pass filters whose outputs
somehow manage to be about 90 degrees out of phase from each other.
Both have different phases from the original. Adapted 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;