bd487e136305da747204de02ec428ee2117b89bf
diff --git a/ChangeLog b/ChangeLog
index 3057672..ed1002f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Oct 31 21:39:13 2007  Stefan Westerfeld  <stefan@space.twc.de>
+
+	* docs/architecture.doxi: Documented the new "fine-tune" xinfo.
+
 Wed Oct 31 20:07:30 2007  Stefan Westerfeld  <stefan@space.twc.de>
 
 	Fix bsewavetool info output for multichannel samples #491552.
diff --git a/docs/architecture.doxi b/docs/architecture.doxi
index cab24ee..a4dd4db 100644
--- a/docs/architecture.doxi
+++ b/docs/architecture.doxi
@@ -114,6 +114,13 @@ of the lowercase letters 'a'-'z', the digits '0'-'9' and a dash '-'.
 	0.5 (play sample half as loud, corresponding to a -6dB adjustment) and
 	0.25 (corresponds to a -12dB adjustment). The range of valid volume
 	adjustments is: 0 < volume <= 1.0, any other value will be ignored.
+@item @strong{fine-tune}
+	The fine tune allows to change the speed and thus the pitch at which
+	the sample is replayed in cent. This does not affect the raw/compressed
+	audio data actually stored. The default is 0, which means no fine tune.
+	Examples of valid values are 100, which would pitch the sample up one
+	semitone (100 cents), 1200, which would pitch up the sample one octave
+	and -50 which would pitch the sample half a semitone down.
 @item @strong{gus-patch-envelope} -
 	Contains the envelope points for a GUS Patch envelope.
 @done
