Marklin sound decoder MSD3. Conversion from Marklin/Trix H0 locomotives with built-in high-performance motor or other DC motors. The Marklin sound DECODER3 has a angeloteten wiring harness with a 30 pin to 8 pin NEM interface Plug for retrofitting of so many locomotives with a matching NEM interface and locomotives with storage space is limited. The Marklin sound DECODER3 supports the digital file formats MFX, mm1, mm2 and dcc. default sound an electric locomotive.