More complicated example for tests

src/cards/SI_7018.conf

@@ -44,10 +44,24 @@ pcm.si7018_rear {
 		type integer
 		default -1
 	}
-	type hw
-	card $(CARD)
-	device $(DEV)
-	subdevice $(SUBDEV)
+        type hooks
+	slave.pcm {
+		@func concat
+		strings [
+                        "pcm.si7018_front:" $(CARD) "," $(DEV) "," $(SUBDEV)
+		]
+	}
+	hooks.0 {
+		type ctl_elems
+		hook_args [
+			{
+				name "PCM Playback Volume"
+				preserve true
+				lock true
+				value [ 24 24 ]
+			}
+		]
+	}
 }	
 
 pcm.rear_0 {