@@ -110,7 +110,9 @@ static const struct {

     { "surround",    3,  CH_LAYOUT_SURROUND },

     { "quad",        4,  CH_LAYOUT_QUAD },

     { "5.0",         5,  CH_LAYOUT_5POINT0 },

+    { "5.0",         5,  CH_LAYOUT_5POINT0_BACK },

     { "5.1",         6,  CH_LAYOUT_5POINT1 },

+    { "5.1",         6,  CH_LAYOUT_5POINT1_BACK },

     { "5.1+downmix", 8,  CH_LAYOUT_5POINT1|CH_LAYOUT_STEREO_DOWNMIX, },

     { "7.1",         8,  CH_LAYOUT_7POINT1 },

     { "7.1(wide)",   8,  CH_LAYOUT_7POINT1_WIDE },