diff --git a/src/main/java/org/jdamico/javax25/App.java b/src/main/java/org/jdamico/javax25/App.java
index 9516c88..8e52923 100644
--- a/src/main/java/org/jdamico/javax25/App.java
+++ b/src/main/java/org/jdamico/javax25/App.java
@@ -36,8 +36,8 @@ public static void main( String[] args )
 
 		/*** preparing to generate or capture audio packets ***/
 
-		String input = null;
-		String output = "PulseAudio Mixer";
+		String input = p.getProperty("input", null);
+		String output = p.getProperty("output", null);
 
 		int buffer_size = -1;
 		try {