--- a/doc/songcast.txt
+++ b/doc/songcast.txt
@@ -8,6 +8,10 @@
 Songcast Sender modules currently
 link:http://www.linn.co.uk/software#songcast[exist for Windows and Mac OS
 X].
+
+upmpdcli also has a Songcast Sender additional package. Unlike the Mac and
+Windows tools, this does not capture arbitrary audio on the Linux host, but
+it is useful for synchronized multiroom audio.
 
 Songcast Receiver modules come with Linn hardware, or with software
 Renderers like