I use both DCS & Legacy on my layout.
I was running a Lionel Legacy GP35 last night and I turned down the volume to 0 to check the smoke unit motor. I then went to turn it back up, and nothing changed, No prime mover sounds! I even reset the engine and still no luck. Later after turning off the layout then back on, I tried the volume up button again, no luck.
I then pressed the AUX 1 button then the volume up key and it worked!
Why does the AUX 1 button effect this function?
Do other Legacy engine functions also depend on the AUX 1 key?