diff --git a/doc/quakeforge-notes.txt b/doc/quakeforge-notes.txt
index 4049748c2..6defe2ca0 100644
--- a/doc/quakeforge-notes.txt
+++ b/doc/quakeforge-notes.txt
@@ -1,6 +1,6 @@
 <ol>
 <li>There are no menus in the current code so the <code>ESC</code> key will take you to the console rather than the menus that are AWOL</li>
-<li><code>sensitivity</code> is gone. In it's place are <code>in_amp</code>, <code>in_pre_amp</code>, <code>in_mouse_amp</code> and <code>in_mouse_pre_amp</code>, which all multiply together to give you the old <code>sensitivity</code></li>
+<li><code>sensitivity</code> is gone. In it's place are <code>in_amp</code>, <code>in_pre_amp</code>, <code>in_mouse_amp</code> and <code>in_mouse_pre_amp</code>, which all multiply together to give you the old <code>sensitivity</code> <a href="/doc/sensitivity.png">Here is a schematic.</a></li>
 <li>By default, you will <em>not</em> get any sound output (in fact you will get a warning about being unable to load the <code>null</code> plugin). use <code>+set snd_output <i>plugin</i></code> on the command line. <code><i>plugin</i></code> is one of:
 	<ul>
 		<li><code>alsa0_5</code> For ALSA 0.5.x</li>
diff --git a/doc/sensitivity.fig b/doc/sensitivity.fig
new file mode 100644
index 000000000..447d19555
--- /dev/null
+++ b/doc/sensitivity.fig
@@ -0,0 +1,111 @@
+#FIG 3.2
+Landscape
+Center
+Inches
+Letter  
+100.00
+Single
+-2
+1200 2
+6 2250 600 4050 1200
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 2250 900 2850 900
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 2850 600 2850 1200 3450 900 2850 600
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 3450 900 4050 900
+-6
+6 4050 600 5850 1200
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 4050 900 4650 900
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 4650 600 4650 1200 5250 900 4650 600
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 5250 900 5850 900
+-6
+6 7650 600 9450 1200
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 7650 900 8250 900
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 8250 600 8250 1200 8850 900 8250 600
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 8850 900 9450 900
+-6
+6 9450 600 11250 1200
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 9450 900 10050 900
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 10050 600 10050 1200 10650 900 10050 600
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 10650 900 11250 900
+-6
+6 2250 2400 4050 3000
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 2250 2700 2850 2700
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 2850 2400 2850 3000 3450 2700 2850 2400
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 3450 2700 4050 2700
+-6
+6 4050 2400 5850 3000
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 4050 2700 4650 2700
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 4650 2400 4650 3000 5250 2700 4650 2400
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 5250 2700 5850 2700
+-6
+6 7650 2400 9450 3000
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 7650 2700 8250 2700
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 8250 2400 8250 3000 8850 2700 8250 2400
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 8850 2700 9450 2700
+-6
+6 9450 2400 11250 3000
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 9450 2700 10050 2700
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 10050 2400 10050 3000 10650 2700 10050 2400
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 10650 2700 11250 2700
+-6
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 1050 600 450 600 450 1200 1050 1200
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 1050 600 1050 1200
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 1050 900 1650 900
+2 2 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 5
+	 450 3000 1650 3000 1650 2700 450 2700 450 3000
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 4
+	 900 2700 300 2100 450 1950 1200 2700
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 5850 2700 7650 2700
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 5850 900 6450 900
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 2
+	 7050 900 7650 900
+2 2 0 1 0 7 50 0 -1 0.000 0 0 -1 0 0 5
+	 6450 600 7050 600 7050 1200 6450 1200 6450 600
+2 1 1 1 0 7 50 0 -1 4.000 0 0 -1 0 0 2
+	 3150 1050 3150 2550
+2 1 1 1 0 7 50 0 -1 4.000 0 0 -1 0 0 2
+	 10350 1050 10350 2550
+3 0 0 1 0 7 50 0 -1 0.000 0 0 0 4
+	 1050 600 1650 600 1650 1200 1050 1200
+	 0.000 1.000 1.000 0.000
+3 0 0 1 0 7 50 0 -1 0.000 0 0 0 4
+	 1650 900 1800 900 1950 750 2100 750
+	 0.000 1.000 1.000 0.000
+3 0 0 1 0 7 50 0 -1 0.000 0 0 0 3
+	 6525 750 6825 750 6975 975
+	 0.000 1.000 0.000
+4 0 0 50 0 28 16 0.0000 4 240 1920 4350 2250 in_joy_pre_amp\001
+4 0 0 50 0 28 16 0.0000 4 240 2370 4350 450 in_mouse_pre_amp\001
+4 0 0 50 0 28 16 0.0000 4 240 1425 2550 450 in_pre_amp\001
+4 0 0 50 0 28 16 0.0000 4 240 1845 7950 450 in_mouse_amp\001
+4 0 0 50 0 28 16 0.0000 4 240 900 10050 450 in_amp\001
+4 0 0 50 0 28 16 0.0000 4 240 1395 7950 2250 in_joy_amp\001
+4 0 0 50 0 28 16 0.0000 4 210 1905 6150 1500 in_mouse_filter\001
diff --git a/doc/sensitivity.png b/doc/sensitivity.png
new file mode 100644
index 000000000..788d0dbd4
Binary files /dev/null and b/doc/sensitivity.png differ