Model Rectifier has enhanced their 16-Bit, Preferred Sound and Platinum Series decoders. Look at these new features

1. MRC's back EMF feature has been improved to make it more versatile. Using enhanced feedback circuitry, the decoder instantly adjusts the motor's speed feedback. 
2.  More realistic sound performance. Certain sounds, previously on a pre-timed loop, can now be manually activated to remain on until the modeler decides to manually turn them off. These sounds includes the air compressor, the blower and others. 
3. Until now, air compressor decoders could only deliver a constant sound. MRC has programmed the air compressor sound on its diesel decoder to be in synch with the RPM of the prime mover. 
4. They've added actual, real-life service braking control. Now, applying the brake sound, F5, will slow the loco down, Simultaneously, a brake squeal will be activated as the brakes are applied. 
5. Dynamic Braking feature, hitting dynamic braking sound, F6, will not only provide sound but also slow the loco down. 
6. Lighting control-17 of them. Including gyro lights, ditch lights, mars lights, strobe, oscillating head lights, cabin lights and more. Some lights you will be able to select differant versions, flashing or constant mode.

Features: 

• Six types of synchronized prime mover sounds
• 1.5 amp capacity
• 22 different types of horns and 8 types of bells
• Adjustable individual sound volumes (16 levels)
• Programmable either 2-digit or 4-digit addresses
• Programmable start voltage and top voltage
• Programmable acceleration and decelaration rates
• Programmable 14, 28, 128 speed steps
• Back EMF load control
• Supports read back address and CV value
• Selectable factory default speed curve
• Advanced speed table control CV67-CV94
• Kick start voltage control CV65
• Easy function mapping
• 7 accessory light effects: ditch lights, mars light, gyra light, strobe light, prime strobe light and on/off
• 28 accessory functions (F1-F28)
• Supports advanced consisting (CV19)
• Supports programming on the main (OPS mode)
• Compatible with NMRA DCC standards
• Complies with Part 15 of FCC Rules
• 18 mm speaker included
• Dimensions: 73.0mm x 17.8mm x 7.7mm