I'm running DCC, but I set the volume and smoke knobs while in conventional mode first before I run it in DCC. On the other four PS-3 locomotives I have it worked just as expected. Even in conventional the smoke knob does nothing on this locomotive. And I don't have DCS so no ability to reload anything. And the sound cutting out seems to only be the bell and horn. I believe the prime mover does keep playing. But I need to try with it being the only locomotive on the layout to be sure.