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I just had another talk with them via e-mail. I asked the question "when you sound the bell or the horn does the prime mover sound cut out" this was the reply "The bell is mixed with the prime mover. The horn is not but unless you are running the sound system into a Hi-Fi system it's a bit hard to tell that the prime mover has stopped and the horn took over. The EMD is the most noticeable of this since in a Hi-Fi system the low 33 Hz idle is quite prevalent. It also depends on what horn is selected since horn valves close at different rates. In the present systems, for the purist, two systems would be deemed necessary. One for the prime mover sounds and the other for the Horn and Bell. The prime mover sounds can be strapped off so that just the Horn and Bell sound from one unit. For most this is not a real issue. We choose a high sampling rate which the micro cannot keep up with to mix some sounds properly." This kind of turns me off to them a little. If you check out the wiring diagram you will see that they have independent connections for all of the functions, ie there is a spot on their board where you solder you function wires from your DCC decoder to. What they suggest that if it bothers you that the prime mover cuts out, buy to sound units and hook only the prime mover up on one and on the other hook up just the bell and horn. That gets expensive!!! But on the other side, they are the only one with a Fairbanks and a Baldwin. I guess it would depend on how bad you want that sound. I asked Soundtraxx if they had plans for a Fairbanks, Baldwin, or Alco 251 sound unit and they said not any time in the near future. That seems odd sence there are some nice models of these out there that could use some plug and play sound units. Also a few different switchers (Alco and EMD type) and how about turbocharged 1st gen EMD and non-turbo 2nd gen? I see uses for these also. To me it would sound silly to put their Alco unit in a C425 or C628, and their 1st gen (the only non-turbo EMD they make) in a GP-38-2.
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