First off I am using an NCE powercab and I did change the whistle sound and that works. I didn't try increasing the volume.. Secondly only got off the phone with Soundtraxx an hour ago since Bachmann was of no help. The tech there said to download the discontinued manual for the original Tsunami and follow that since they were very similar. Upon reading some of the manual you can see that some of the CV's are the same and yet some in the Sound value were missing which leads me to believe that this decoder is the step child of a Tsunami. I will try things out in the next few days and see what happens. Thanks for your responses. If anything significant develops I will report it.