Hi there, my buzzer changed volume after I installed Aqua Computer Passive Cooler for Aquaero 6. Previously, it was much louder, but after I installed the heatsink, the buzzer just makes a slight high-pitched whine (which can't be heard with earphones on and nothing playing) and it also makes a clicking noise at the same time.
This post has been edited 2 times, last edit by "Undesirable" (May 26th 2015, 6:34pm)
It sounds like there is an issue with your aquaero.
Your best route is probably to start a conversation with tech support (for the human test, just add the two numbers)