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diff --git a/wavestretcher~-help.pd b/wavestretcher~-help.pd
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@@ -0,0 +1,250 @@
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+#X msg 562 332 1;
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+#X text 325 144 it also generates continuously variable duty cycle
+pulse waveforms from the trisaw wave.;
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+#X text 572 670 (c) 2012 Edward Kelly;
+#X msg 36 84 90;
+#X text 325 117 wavefolder~ derives continuously variable sawtooth
+- to triangle shaped waveforms from phasor~ input.;
+#X text 320 263 inlets: signal(phasor~ output) \, trisaw shape \, pulse
+threshold;
+#X text 321 292 outlets: trisaw wave \, pulse wave;
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+#X text 407 456 wavestretcher~ derives a waveform from a triangle/sawtooth
+wave input that morphs between different shapes.;
+#X text 409 483 with the breakpoint at -1 \, the stretch factor morphs
+between a square and a sawtooth wave \, and with the breakpoint at
+e.g. 0.99 \, the stretch factor morphs between a sawtooth and alternate
+pulse-train style waveforms.;
+#X text 420 535 various flavours of pulse/saw/trapezoid waveforms may
+be seamlessly morphed between.;
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+#X text 212 26 wavefolder~ and wavestretcher~ extend the spectral modulations
+typically found in Pulse-Width Modulation \, providing a variety of
+waveshape modulations not found in traditional subtractive synthesis
+methods.;
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