I've tried to solve this problem for a few weeks now, and it's driving me crazy !
I've search on many forums about it. It seems to be a common issue, but hasn't been answer with any proper solution...
- My setup is :
Scarlet focusrite 2i2 3rd gen, bought with the bundle with its dynamic mic and XLR cable.
Computer : MSI GL63 85C laptop, with an external Viewsonic secondary screen connected with HDMI
Also my home's outlets don't have any ground wire (it's an old french building).
- Here's my problem :
A constant buzz appears when I listen to the mic feedback (either with direct monitoring, or in my cubase feedback).
The sound disappears when I touch either the interface, the metallic part of the XLR close to the mic (this one is the most efficient, and the buzz almost disappears completely), or some part of the microphone stand.
It also disappear when I disconnect both the powercable of the laptop and the HDMI cable of my external screen.
- What I've tried :
I've tried using a gate to eliminate the problem, but it doesn't produce a satisfying result. Anyway I would like to solve the hardware part of the issue.
I tried to use an externally powered USB hub in order to isolate the USB powerage of the interface from the motherboard of my laptop.
(this one : https://www.amazon.fAtolla-aliment%C3%A9-multiprise-commutateurs-individuels/dp/B07ZNKS8ZV/ref=sr_1_6?__mk_fr_FR=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=1VHA57JP9FIU&dchild=1&keywords=hub+usb+atolla&qid=1602588398&sprefix=hub+usb+at%2Caps%2C160&sr=8-6
Unfortunatelly it didn't work as I expected. The hub also works without the external powerage and is still connected to the motherboard's USB power, and the external power supply is just complementary. I tried cutting the 5V power wire from the PCB of the hub, in order for it to operate as I wanted to, but it just made the hub unusable (still powered by the external power but the computer doesn't detect any USB connection anymore).
- Solutions I'm thinking about :
- Finding another HUB which would do the job as I expected this one to do (any reference ?)
- Put a ferrite bead on the USB cable of the Focusrite (could it really be effective ?)
What do you think about it ?
I would be profoundly grateful if any of you could give me a piece of advice that would help me fulfilling my quest of musical creations ! :D