Loud humming noise after boot with Creative Audigy 2ZS Platinum Pro and Klipsch GMX Promedia on digital input only
Posted on 2004-08-03
Windows XP Pro Service Pack 2
Dell 530MT workstation dual hyperthreaded 2.2 gHz Xeon processors
Creative Labs Audigy 2ZS Platinum Pro sound card 188.8.131.523 driver
Klipsch GMX Promedia speakers with digital optical input to Audigy hub digital optical output
nVidia GeForce FX 5950 Ultra graphics card 184.108.40.206 driver
Belkin PCI USB/Firewire card
Logitech wireless keyboard
Logitech wireless optical mouse (Bluetooth)
When I connect my old Boston 2.1 analog speakers to the Line 1 out on the Audigy sound card, I get OK sound and no hum.
When I connect the Klipsch 5.1 speaker system to the digital optical out on the Audigy hub, I get a very loud hum. It does not always occur, but today it does not go away. This hum does not occur at initial boot but occurs at some point just before the login screen appears. It is not constant; it seems to change with what is displayed on the screen. Mouse movements also affect it.
Problem existed before installation of XP Service Pack 2.