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diff --git a/pd/doc/3.audio.examples/E03.pulse.spectrum.pd b/pd/doc/3.audio.examples/E03.pulse.spectrum.pd
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+#X text 63 1 PULSE SPECTRUM MEASUREMENT;
+#X text 16 377 Here is a measured amplitude spectrum for the pulse
+train. Nutice that \, other than a smallish spillover \, the energy
+sits in one "lobe" whose changing width justifies our calling the squeeze
+factor the "bandwidth.";
+#X text 16 442 The spectrum is in units of amplitude. THe sidelobes
+\, although they look small \, are actually only about 34 dB down.
+You can design more complicated pulse trains \, little Blackman window
+functions \, which control the sidelobes much better.;
+#X text 17 518 The spectrum measurement is done in the "pd fft" subwindow
+\, but see the "FFT examples" for information about that.;
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+#X text 633 511 ---- 0.02 seconds ----;
+#X text 160 319 <-- output;
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