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Tsunami2 Digital Sound Decoders

Tsunami2 is SoundTraxx’s new line of high-performance Digital Sound Decoders. This line provides high-quality onboard locomotive sound, precision motor control, and brilliant lighting effects. The Tsunami2 Digital Sound Decoder is designed to enhance your model railroading experience by giving you a wide variety of innovative features and only the most realistic sound for your models. Scroll down to learn about more Tsunami2 Features!











Scroll Down to Learn More About Tsunami2 Features!

Tsunami2 Features


Tsunami2 leads the industry in processing power with a 32-bit processor that provides the necessary horsepower to support 28 functions, 16 polyphonic sound channels, tons of sound and lighting effects, and advanced motor control.

Tsunami2 Digital Sound Decoders integrate a full-featured sound system, Hyperlight™ lighting effects, Hyperdrive2™ advanced motor control, and a DCC decoder into a single package. Tsunami2 Digital Sound Decoders offer over 50 individual sounds and over 20 lighting effects in each model!

Did you know that our Tsunami2 includes many built-in features designed to help your model railroad operate as realistically as possible? Tsunami2 sound decoders are so powerful that they come with four special effects processors: the Equalizer, Sound Mixer, Dynamic Digital Exhaust, and Reverb. It's like having a complete sound studio at your fingertips!


Tsunami2 steam decoders are loaded with amazing features that bring your railroad to life!

With Tsunami2's adjustable steam cut-off, you will feel like you are in the cab and in control. We have also added new and remastered sounds to add even more realism to your models. Tusnami2 steam decoders can produce over 60 sound effects including 12 bells, 90 whistles, 10 air pumps, 8 dynamos, 10 exhaust chuffs, snifter valve, injectors, Johnson Bar, power reverse, firebox blower, side rod clank, brake squeal, and more!

  • 10 new or remastered exhaust chuffs in a single decoder
  • Newly remastered Dynamic Digital Exhaust
  • Functioning adjustable exhaust cut-off
  • Functioning locomotive and train brakes with adjustable braking rates
  • 90 whistles
  • Selectable compressors, bells, Dynamos, couplers, and more
  • Fireman Fred sounds for coal-fired, wood, oil, or auger-fueled locomotives
  • Locomotive servicing sounds
  • Traditional 2-cylinder, plus new 3-cylinder and articulated settings on all exhaust chuffs
  • Clickety-Clack and new authentic drifting sounds


Tsunami2 diesel sound decoders are full of new features!

Tsunami2 diesel sound decoders are full of new features with over 60 sound effects including engine startup and shutdown, engine prime mover through all eight notches, Straight-to-8, HEP mode, 13 bells, over 40 airhorns, 4 air compressors, dynamic brakes, radiator fans, brake squeal, and more!

  • Each diesel version (EMD, GE, etc.) contains up to 12 manufacturer-specific prime movers in one decoder (Turbo, Non-turbo, etc.)
  • First ever Diesel Dynamic Digital Exhaust (DDE) for a more authentic operating experience
  • Prime Mover Pitch Shift to make each of your models sound unique
  • Startup, shutdown, and exhaust through 8 notches
  • Automatic or manual notching
  • Functioning dynamic brake with variable load sound and adjustable braking rate
  • Over 40 airhorns
  • Straight-to-Idle & True Idle Features
  • Selectable compressors, bells, and couplers
  • First-ever Fireman Ed is ready to work on the locomotive, with general service, cab sounds, and more!
  • Clickety-clack, fueling, and authentic cab chatter add realism
  • Prototypically correct HEP modes and steam heat for authentic passenger train operations
  • Auxiliary HEP Generator 


Tsunami2 electric sound decoders are full of new features including over 40 airhorns/ air whistles, 13 bells, 4 air compressors, traction motor whine, and the sound of the pantograph raising and lowering.

Whether you are equipping a modern ACS-64 or an urban trolley, everything you need is here!

  • First ever Electric DDE with traction motor whine
  • Pantograph operation sounds
  • Over 40 airhorns/air whistle selections
  • Motorman Omura provides cab sounds, operates doors, and services the engine
  • Catenary arcing sound and lighting effect
  • Selectable compressors, bells, and couplers
  • Clickety-clack and authentic cab chatter add realism
  • Trolley bell, stop requests, and door sounds for trolleys and traction models
  • Steam heat for authentic passenger train operation

Dynamic Digital Exhaust Calibration Process

Choosing the best Decoder Format for your Model

Tsunami2 Steam Decoder Chuff Cadence

Hyperdrive2 Advanced Motor Control

SoundTraxx makes the sound!

LED Compensation Mode with SoundTraxx Decoders

CV 3&4 Acceleration & Deceleration Rate

Blow Proper Whistle Signal (F2/F3)

CV 116 Dynamic Brake Rate

Dynamic Digital Exhaust

Tsunami vs. Tsunami2 Dynamic Digital Exhaust

Tsunami2 Passenger Operations

Tsunami2 Resources