Hi all,
This issue was originally posted in the windows 7 forums but no one had an answer (toslink optical connection has intermittent hum - Windows 7 Help Forums).
I have an odd problem. I have my pc audio connected to my stereo via the optical out. I am getting an intermittent humming noise (sorta like a ground loop hum but of course that is impossible for optical). My optical out goes to a minisharc and then to the amps. I've checked the toslink cable (switched it out) but it couldn't really be that anyway.
Now, this noise is independent of the volume level I set in windows, BUT if I mute windows audio it stops. It appears connected to various applications, like chrome and media monkey, IE, etc because if I go into the realtek digital output settings (where you see master volume and the volume for various apps like chrome, etc) and I mute them one at a time, it will go away when it hits the right one. It also goes away on its own for no reason Ii can fathom. It is always the same volume regardless (unless I turn my stereo volume up). I've disabled the AMD audio devices (HDMI out) for what it is worth.
It appears that apps are outputting an intermittent low level noise for some unknown reason at unknown times. Does anyone have any explanation/ fixes for this? It is pretty annoying.
Thanks,
Pete
Driver Packaging Version 14.301.1001-140915a-176154C
Catalyst Version 14.9
2D Driver Version 8.01.01.1423
Direct3D Version 9.14.10.01061
OpenGL Version 6.14.10.13084
Mantle Driver Version 9.1.10.0034
Mantle API Version 94209
AMD Catalyst Control Center Version 2014.0915.1813.30937
AMD Audio Driver Version 7.12.0.7719