Sound files produced specifically for the Bachmann Branchline Class 117 DMU using recordings from real units. CLASS 117 DMU HISTORY. Bachmann Branchline OO Scale. Adding a DCC sound decoder, or opting for aSOUND FITTED model with pre-fitted sound decoder, will put the pre-fitted speakers to good use – two of which are fitted, one in the DMS and one in the DMBS.
