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+VDOWNMIX PLUGIN
+===============
+
+The vdownmix plugin is a downmixer from 4-6 channels to 2-channel
+stereo headphone output. This plugin processes the input signals with
+a simple spacialization, so the output sounds like a kind of "virtual
+surround".
+
+For example, define the below:
+
+ pcm.!surround51 {
+ type vdownmix
+ slave.pcm "default"
+ }
+ pcm.!surround40 {
+ type vdownmix
+ slave.pcm "default"
+ }
+
+and the outputs from video player to these PCMs are converted to the
+default 2.0 output with a proper downmix.
+
+The accepted format is currently only S16.