Hi Bryan...

The sound switch on and off is one of my todo list.

The reason to shutdown over the centaur is easy... There is a board built in the centaur, this one handles recharging the battery and other things... The centaur goes not down if your charge it, Linux is always running.. if you unplug the power you see one A8 blinking, that the moment the centaur shut's down 100%. In this state you can control battery charging and much more. It makes sense to shutdown this over this procedure.

Dirk