I posted a thread on my configuration that I set up for extending my PC display and USB over ethernet here
. The final configuration is in the post dated 11-02-11. The two devices I'm using are:
- NTI DVI Extender with Stereo Audio
- Icron USB 2.0 Ranger 2204 - 4 port USB 2.0 Cat5 Extender
Have come across an audio issue with my setup I listed in the thread, and am at wits end on where the problem could be.
If I connect the stereo audio port on my DVI extender to the on board audio on my motherboard, no issues. Sound is very clear and clean.
However, I also have an external USB sound card, an RME Babyface which looks like this
. As soon as I connect the DVI audio to the RME sound card, I heard buzzing, almost like it isn't grounded properly.
The strange thing is that the buzzing corresponds with PC processing activity, not sure if its CPU, memory, or video card activity. Every time I load a program, or run a program that requires some processing load, the sound buzzes, pops, and clicks almost like I have an ear to the motherboard as it's working. If I have absolutely nothing running, it's almost quiet.
- Different audio cables & connectors
- Different audio ports on the USB sound card
- Connecting the USB sound card to different USB ports on the PC
Again, this is ONLY when using the USB sound card. The onboard motherboard sound card does not have this problem, so it can't be an issue with the DVI extender.
I've already talked to NTI support about this and they have no clue what could be causing this.
Kind of a long shot posting here, since it's not exactly a common setup, but there are a lot of wizards on this site so thought I'd try. Any ideas?