The following is a repeat of a post I made several days ago.
Those with a Bachmann Spectrum DCC Sound On Board (factory installed sound decoder) steam locomotive can benefit from the information in the following SoundTraxx documents.
Tsunami Digital Sound Decoder OEM Steam Sound User's Guide (http://soundtraxx.com/manuals/OEM%20Steam%20Users%20Guide.pdf)
Quick Start Guide For Bachmann DCC Sound-Equipped Locomotives (http://soundtraxx.com/manuals/Bachmann%20Quick%20Start%20Guide.pdf)