Hi,
Thanks for your reply. I just made a quick test with other time settings.
1. minimum time = 1s, time per passenger = 0.01s -> boarding sound played for about 5 minutes
2. minimum time = 0.01s, time per passenger = 0.01s -> same result (about 5 minutes)
the strange thing is, I had my settings set to 0s and 0s for about a year now, and boarding sounds were "disabled" like this. Only since I installed the latest update it doesn't work anymore.