Minor changes I forgot to commit previously

NightScout/Program.cs

@@ -16,7 +16,7 @@ namespace NightScoutAlert
             if (args.Any(arg => arg.Equals("--test-audio")))
             {
                 Console.WriteLine("Starting audio test...");
-                RaspberryPiAudioAlert alerter = new RaspberryPiAudioAlert();
+                RaspberryPiAudioAlert alerter = SetupAudioAlert();
                 alerter.StartAlert();
                 Thread.Sleep(3000);
                 alerter.StopAlerts();
@@ -48,20 +48,15 @@ namespace NightScoutAlert
             {}
             
             NightscoutDataSource dataSource =null;
-            RaspberryPiAudioAlert audioAlerter = null;
+            RaspberryPiAudioAlert audioAlerter = SetupAudioAlert(buttonSource);
 
             if (buttonSource != null)
-            {
                 dataSource = new NightscoutDataSource(configuration,
                     log4net.LogManager.GetLogger("NightscoutAlert"), buttonSource);
-                audioAlerter = new RaspberryPiAudioAlert(buttonSource);
-            }
             else
-            {
                 dataSource = new NightscoutDataSource(configuration,
                     log4net.LogManager.GetLogger("NightscoutAlert"));
-                audioAlerter = new RaspberryPiAudioAlert();
-            }
+
             ILog log = log4net.LogManager.GetLogger("NightscoutAlertMain");
             log.Debug("Log started");
             ConsoleAlerter consoleAlerter = new ConsoleAlerter();
@@ -123,5 +118,21 @@ namespace NightScoutAlert
             Console.WriteLine("Started");
             Console.ReadLine();
         }
+        private static RaspberryPiAudioAlert SetupAudioAlert(RaspberryPIButtonSource buttonSource = null)
+        {
+            RaspberryPiAudioAlert alerter;
+            if (buttonSource != null)
+                alerter = new RaspberryPiAudioAlert(buttonSource);
+            else
+                alerter = new RaspberryPiAudioAlert();
+
+            String ALSADeviceNumber = ConfigurationManager.AppSettings["ALSADeviceNumber"];
+            Int32 devNumber = 0;
+            if(!String.IsNullOrEmpty(ALSADeviceNumber) && Int32.TryParse(ALSADeviceNumber, out devNumber))
+            { //Set device
+                alerter.SetALSAAudioDevice(devNumber);
+            }
+            return alerter;
+        }
     }
 }