When trying to run southbound timetable routes with the F40ph, if it's a limited or baby bullet train, the main engine sounds are missing except for the HEP engine. So for example if you accelerate at different notches, the engine usually gets louder, but the sounds are missing. If it's a regular local train(all stops), then the engine sounds are present. I don't know if anyone else is having this issue but I've already noticed Peninsula Corridor is having a spectrum of audio issues so it's not too unexpected. Kind of sucks because then I can't really run half of that engine's routes because of missing audio :/ . Though, I'm imagining it has to do something with the those limited/baby bullet routes sharing exact times with both MP36ph's and F40ph's. What I mean is in the timetable, you can choose either one to run the same timetable limited/baby bullet route.