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Currently I use the TA SD-70MAC sounds for my EMD 710 locos (SD70), etc. The sounds are OK, except for a very annoying momentary silence between idle and Run 1 (and from Run 1 to idle). I tried all kinds of different "fixes" to eliminate that problem--to no avail.Last week I had occasion to sit and listen to 3 UP SD70's as they waited for a green signal. First, they sat for several minutes at high idle while the prime movers cooled down--then they dropped to low idle. When they left town, I got the full sound effect as they throttled up and leaned into the load. That "live" performance demonstrated how lacking the current .sms files and .wav's are in capturing the sound of this locomotive. Is anybody out there working on a better sound pack for this locomotive? After all, UP only has, what, 1100 or so of them!
Hi krswen,Your fix worked! No more gap! Now if I could just figure out that low-idle. The UP mechanical people tell me that the SD70 (presumably all the newer 710's) are set up to run at high-idle in hot weather until the prime mover is cooled to proper temperature, then the idle drops to a bare minimum to conserve fuel. Often when loco's are "off-duty" they may stay at low-idle for hours. Some are equipped with automatic shut-off that will shut down the prime mover after a while. It will restart if its temperature drops below a certain point. When in train service, only the trailing units are usually allowed to shut down this way when sitting--the lead unit maintains air pressure, etc.In cold weather, just the opposite occurs. The prime mover will drop to low-idle only if its temperature is high enough. If, at low idle, the prime mover temperature drops too low, it will throttle up to high idle to warm up. Below freezing, the automatic shut-off is disabled.For sound junkies, this makes the SD70 a pretty interesting locomotive. Now if MSTS would just let 3 or 4 of them on a train "do their thing" when sitting on a siding!