Features: * Tsunami(TM) Sound Decoders. New $113.05. * This high-performance, onboard locomotive sound system combines a full-featured sound system, four Hyperlight lighting effects, a motor controller and a DCC decoder into a single, integrated unit. Compatible with NMRA standards and Recommended Practices, the Tsunami can also be used on DC layouts with a conventional power pack. At Tsunami's core is a true 16-bit Digital Signal Processor, or DSP, capable of executing over 120 million instructions per second. This provides 14 functions, over 22 individual sounds, and 4 special effects including the ability to alter the exhaust sound automatically in response to changes in the engine