Nyrrth
Active Member
Hi guys,
After doing a fair bit of troubleshooting, I've realized that the sounds produced inside my mid-2011 21.5" iMac (power supply, circuits, etc.) are being transmitted through my hi-speed USB 2.0 cable into my audio interface (Roland Octa-Capture), and out my powered speakers (KRK Rokits). I hooked up my Macbook (much older model), and the sounds go away, with everything else being the same.
Has anyone else had this issue? If so, how did you get around it? I've heard that using a powered USB hub can fix this, and I also know of optical USB extenders that may do it (although they cost more than the interface itself, which is pointless). I also believe there are some galvanic isolators out there, but from what I know, they only support up to full speed (12 Mbps) USB and not hi-speed (480 Mbps).
Your help and insight would be much appreciated! The sounds are driving me nuts. Each time a page loads, I move the mouse, etc. I hear the corresponding sound in the form of hisses, crackles, squeals and the like.
Thanks!
After doing a fair bit of troubleshooting, I've realized that the sounds produced inside my mid-2011 21.5" iMac (power supply, circuits, etc.) are being transmitted through my hi-speed USB 2.0 cable into my audio interface (Roland Octa-Capture), and out my powered speakers (KRK Rokits). I hooked up my Macbook (much older model), and the sounds go away, with everything else being the same.
Has anyone else had this issue? If so, how did you get around it? I've heard that using a powered USB hub can fix this, and I also know of optical USB extenders that may do it (although they cost more than the interface itself, which is pointless). I also believe there are some galvanic isolators out there, but from what I know, they only support up to full speed (12 Mbps) USB and not hi-speed (480 Mbps).
Your help and insight would be much appreciated! The sounds are driving me nuts. Each time a page loads, I move the mouse, etc. I hear the corresponding sound in the form of hisses, crackles, squeals and the like.
Thanks!