One correction, I don't believe Railsounds 6 was used with the RCMC. The RCMC changed the serial protocol for talking to the sound card and the sound card also had any "memory" removed. Things like the bell function are controlled for each ding from the RCMC as opposed to just starting and stopping the bell with a serial command. This information came from Jon Z., the designer of the RCMC, so I'm pretty sure it's accurate. This is also why you can't get the new RS-Lite Legacy sound cards working with the older Legacy R4LC board. Try swapping Legacy tenders from newer RCMC equipped Legacy engines with older tenders from the pre-RCMC equipped engines, you'll see that while many functions work, others don't.