Bachmann Trains sound off with an extensive line of DCC Sound-equipped Spectrum locomotives. Working closely with Soundtraxx, Bachmann is pleased to offer HO, On30 and Large Scale engines equipped with Tsunami sound technology. Using sounds taken from real locomotives, modelers can add a new level of realism to their railroads with a broad palette of prototypical sound effects and DCC functions. Plus, the dual mode decoders work on both DC and DCC layouts automatically. So break the silence on your railroad with Bachmann Spectrum DCC Sound On Board locomotives.