Various strange sounds the R32 makes:
Loud whirring just after unlocking and opening the door is fuel pump.
Quiet high pitched whirring from rear passenger seat area while car is running, fuel pump.
Clicking/popping from passenger rear just after start-up is Evap system leak detection pump.
Random interval clicking sound from passenger front under the hood, is evap system purge valve.
Quiet whirring and gurgling sound from driver side of engine bay after car is shut off, is electric aux coolant pump.
Very high pitched whine that varies with engine rpms, usually when lifting off the throttle. Source unknown, but it's normal.