On the pro I have noticed if I use app controller and turn on the blade it seems louder then when I run a plan even while I am moving the yarbo. I also saw while mapping a blade option toggle than i turned on for that zone but I cannot find that option now? Maybe I was seeing things. Is there a different option “blade” for the blades opposed to the disc’s and if so i’m guessing the disc is default? I still find it odd my pro came w/ the disc installed.
No difference in manual or auto. You might just be hearing it spool up which is louder when it’s turning on initially. It will also be quieter when moving and cutting grass.