+string default="sleep"
+optional
+details="
+ para_fade knows these three different modes.
+
+ sleep mode: Change to the initial volume and an initial afs
+ mode, then fade the volume down until the fade out volume is
+ reached. Switch to the afs sleep mode until the wake time is
+ reached. Then switch to the afs wake mode and and fade in to
+ the wake volume.
+
+ fade: Fade the volume to the given value in the given time.
+
+ snooze: Fade out, sleep a bit and fade in.
+"