diff --git a/DOCS/documentation.html b/DOCS/documentation.html
index 9b4aa47da4..f75dec03a2 100644
--- a/DOCS/documentation.html
+++ b/DOCS/documentation.html
@@ -1023,6 +1023,15 @@ add an option <CODE>-vc rawi420</CODE> due to a fourcc conflict with
 an Intel Indeo video codec.
 </LI>
 
+<LI>
+There are several ways of capturing audio. You can grab the sound
+either using your soundcard via an external cable connection between
+video card and line-in, or using the built-in ADC in the bt878
+chip. In the latter case, you have to load the <b>btaudio</b>
+driver. Read the <CODE>linux/Documentation/sound/btaudio</CODE> file
+(in the kernel tree, not MPlayer's) for some instructions on using this driver.
+</LI>
+
 <LI>
 If MEncoder cannot open the audio device, make sure that it is really
 available. There can be some trouble with the sound servers like arts