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diff --git a/pd/doc/3.audio.examples/47.bandpass.pd b/pd/doc/3.audio.examples/47.bandpass.pd
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+#N canvas 58 17 943 765 12;
+#X floatatom 91 731 0 0 0;
+#X graph graph1 0 -1 155947 1 624 401 824 251;
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+#X text 24 190 audio;
+#X text 112 132 show level;
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+#X text 320 706 <-- output amplitude;
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+#X text 648 14 START;
+#X text 845 19 STOP;
+#X text 88 11 BANDPASS FILTERS;
+#X text 12 41 In this example we use two cascaded bandpass filters
+to troll for partials in Jonathan Harvey's famous bell sample.;
+#X obj 78 487 r totsamps;
+#X text 14 82 Note that filters can give unexpected level changes.
+The bp~ object is designed to have roughly unit gain at teh pass band
+\, so the higher you set "Q" the more amplitude is lost. YOu can correct
+for this by pushing the output amplitude \, but be sure to remember
+to reset the output amplitude before you reduce Q again. I set the
+Q to 100 and the output amplitude to 110 or 120 (with the room gain
+way down.) Then holding the shift key \, slowly drag the center pitch
+upward listening for modes.;
+#X text 16 233 You can hear partials around 48 \, 51.3 \, 55 (faint!)
+\, 57 (fainter!) \, 60 \, two beating partials around 65 \, 67 \, 69
+\, 70.9 \, 71.75 \, 72.6 \, 74 \, 74.65 \, 75.6 \, 77 \, 81.2 \, 84.6
+\, 86.5 \, and probably many more. There's also one down at 36 \, but
+it's easier to see it on the meter than hear it.;
+#X text 271 436 <-- center pitch;
+#X text 281 450 (shift-drag to fine tune);
+#X text 292 492 <-- center frequency;
+#X text 359 570 <-- Q (filter selectivity);
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+#X msg 553 48 \; readfile ../sound/bell.aiff \; totsamps 143718 \;
+p 69 \; q 0 \; pd dsp 1;
+#X text 681 739 updated for Pd version 0.33;
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