Variable voltage control is erratic. The app randomly gets stuck and engines cruise off. Sometimes it shoots to 20v. It is a latency bug MTH has been aware of for almost a year without a fix.
Postwar and Modern Lionel engines blow horns continuously using MTH DCS app's variable voltage control. There is something ugly in the waveform wreaking havoc on relays and sound cards, especially at lower voltages. If you increase the voltage beyond about 15-16v, the horns and whistles stop. Drop the voltage below 15v, continuous horn again. The speed slider is no way to control horns and whistles.
At lower voltages, the MTH DCS app chops up the power so badly, it feels like 30 Hz AC - rattles E-units, runs AC motors rough. I can even make barrels charge up my postwar 362 barrel ramp without it's diode. So I know the power frequency is chopped down horribly to simulate a lower voltage.
There is a minimum starting variable voltage bug. It always starts at 5v, even when you set the minimum to be less.
All engines miss watchdog signals, unless TIU is in passive mode. Doesn't matter whether voltage is applied from variable or fixed channels. I have given up and now use a Lionel Powermaster to deliver power with a passive hookup to the TIU.
DCS engine volume starts full blast, regardless of app setting. But as soon as you touch the volume button, it drops to the correct volume.
Legacy locomotive RPM ramping does not work.
Speed dial has a momentum bug which affects DCS, Legacy, TMCC operation. I call it the 59 mph dead zone. See attached video.
