diff --git a/src/conf/pcm/surround41.conf b/src/conf/pcm/surround41.conf
index 10e486e2..2f823815 100644
--- a/src/conf/pcm/surround41.conf
+++ b/src/conf/pcm/surround41.conf
@@ -53,12 +53,11 @@ pcm.!surround41 {
 			]
 		}
 	}
-	slave.channels 6
-	ttable.0.0 1
-	ttable.1.1 1
-	ttable.2.2 1
-	ttable.3.3 1
-	ttable.4.5 1
+	ttable.0.FL 1
+	ttable.1.FR 1
+	ttable.2.RL 1
+	ttable.3.RR 1
+	ttable.4.LFE 1
 	hint {
 		description "4.1 Surround output to Front, Rear and Subwoofer speakers"
 		device $DEV
diff --git a/src/conf/pcm/surround50.conf b/src/conf/pcm/surround50.conf
index 7b7b17e1..dc95c179 100644
--- a/src/conf/pcm/surround50.conf
+++ b/src/conf/pcm/surround50.conf
@@ -53,12 +53,11 @@ pcm.!surround50 {
 			]
 		}
 	}
-	slave.channels 6
-	ttable.0.0 1
-	ttable.1.1 1
-	ttable.2.2 1
-	ttable.3.3 1
-	ttable.4.4 1
+	ttable.0.FL 1
+	ttable.1.FR 1
+	ttable.2.RL 1
+	ttable.3.RR 1
+	ttable.4.FC 1
 	hint {
 		description "5.0 Surround output to Front, Center and Rear speakers"
 		device $DEV