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diff --git a/doc/scrollgrid1D~.pd b/doc/scrollgrid1D~.pd
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+#N canvas 309 57 748 724 10;
+#X obj 116 116 scrollgrid1D~;
+#X msg 36 92 reset;
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+#X obj 504 206 table t 10000;
+#X obj 123 222 vol~;
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+#X text 103 47 frequency;
+#X text 197 45 T1;
+#X text 249 45 T2;
+#X text 301 46 N;
+#X msg 111 66 350;
+#X msg 235 66 1;
+#X msg 291 65 3;
+#X msg 188 65 12;
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+#X text 233 292 parameters:;
+#X text 266 359 N = number of scrolls or unstable rotation centers
+in attractor;
+#X text 233 404 outputs:;
+#X text 230 468 some remarks;
+#X text 266 422 the first output is alongside the scoll centers \,
+the other two are orthogonal to this line.;
+#X text 368 130 X Y Z;
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+#X msg 132 263 500;
+#X msg 163 263 5000;
+#X text 265 325 T1 = unstable time constant in ms ("attack" time);
+#X text 265 342 T2 = stable time constant in ms ("release" time);
+#X text 265 660 the entire circuit is clipped \, which means that for
+some parameter values that would normally cause a blowup \, its behaviour
+is limited to that of an oscillator.;
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+#X msg 142 66 5000;
+#X text 264 309 freq = spiral frequency in Hz;
+#X text 265 493 this chaotic system is a switched unstable linear system.
+it consists of N scrolls (outward spirals). when the amplitude of the
+spiral has reached a certain threshold \, it is switched to the nearest
+fixed point (a neighbour spiral). the freq parameter determines the
+frequency of the outward spiralling motion on a scroll. T1 is the outward
+spiralling time constant. T1 large means slow buildup or mild chaotic
+motion \, T1 small means fast buildup or turbulent chaotic motion.
+T2 is the time constant with which a trajectory is attracted to the
+plane of a scroll. T2 small means fast attraction \, T2 large means
+slow attraction.;
+#X text 45 11 stabilized scroll grid chaotic oscillator with scroll
+centers located on a line.;
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