TRS cables. Sorry, that's what they called them here in Brasil, forgot to translate
Input ground loop hum only when p10 cables or XLR without phantom power are connected
I own a Scarlett 2i4 (USB interface) and all of a sudden a ground loop appeared that only makes noise when p10 cables or XLR cables without phantom power (when I turn it on, it disappears) are connected. I’ve changed the cables several times and nothing seems to work. Please help!
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- 23 posts total
No preamp, just a Scarlett connected via USB cables into my notebook. The cables causing the problems are the one on the Scarlett inputs, that I use whem I connect my guitar or bass with TRS cables or a mic with XLR ones...I've read that post, but what intrigues me is that the interference/hum only appears when I'm recording, when there's something connected on the inputs. When there's nothing there, the output sound/playback is perfect |
Actually, pro-audio equipment (such as the Scarlett) typically have floating ground on their internal circuits. This requires special cable wiring on certain conditions such as a TRS-to-RCA cable where you actually have to disconnect the ground/shield wire from the RCA cable itself. See this link: http://www.rane.com/note110.html Many pre-made cables are not wired correctly here. I actually had to modify a Mogami RCA-to-TRS cable as well as a custom XLR-to-TRS cable to remove a ground loop hum issue when I used a Rane MLM82a stereo line mixer between my computer/dac and some powered monitors. |
- 23 posts total