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dirthard~.maxpat
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"code" : "/*\nVariable-hardness clipping function\nby Laurent de Soras\nhttp://www.musicdsp.org/archive.php?classid=4#277\n(see link for alternatives)\n\nNotes: \nk >= 1 is the \"clipping hardness\".\n1 gives a smooth clipping, and a high\nvalue gives hardclipping.\n\nDon't set k too high, because the\nformula use the pow() function, which\nuse exp() and would overflow easily.\n100 seems to be a reasonable value\nfor \"hardclipping\"\n\nCode : \nf (x) = sign (x) * pow (atan (pow\n(abs (x), k)), (1 / k));\n*/\nvarHard(x, a, k) { /* a == 'drive', k == 'clipping' */\n\r\n\ta = clip(a, 1., 100.); /* 'gating' above 10.-ish */\n\tk = clip(k, 1., 1000.); /* aliasing above 100.-ish (depends!) */\n\tx = x * a;\r\n\n\treturn sign(x) * pow(atan(pow(abs(x), k)), (1. / k));\n}\n\r\nout1 = varHard(in1, in2, in3);",
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