I have a scratching noise coming out from my new active nearfield studio monitors. I tried everything I could think of, and I'm looking for new ideas.
Here is a recording that I made of the sound. I used a simple USB microphone put in front of the speakers, so it fails to render the noise as loud as it can be when I sit in front of my monitors, therefore here is an amplified version (+ 20dB using Audacity).
The noise happens all the time, whether I play a sound or not. This noise is not constant, but very regular, and seems to be more present with the "CPU activity" of my computer (for example when I start a software, the noise is more present). The volume of the noise increases with the volume of the monitors, but not with the output volume of the audio interface.
My hardware :
- audio interface : Focusrite Scarlett 2i2 3rd Gen, connected to my computer through USB-C.
- Monitors : KRK Rokit RP5 G4, linked to the audio interface through standard 6.5mm new cables, 1m long.
- "standard" desktop computer (assembled by IT professionals) without any specific noise coming from it (ventilators are low).
When I use my laptop computer instead of my desktop (no other change in the equipment), the noise is completely gone, and the sound is perfect. This seems to indicate that the problem resides somewhere in my computer. I tried to use all the USB ports I have (front and back), tried other USB cables, all of this with no luck. When I use headphones on my audio interface, I don't have any scratch noise (even without noise reduction).
I thought that maybe there was some kind of electrical problem somewhere in my house setup, so I tried everything I could imagine, from using an other power plug, to plug my computer/my monitors/any combination in between on a uninterruptible power supply (plugged, or on battery). All of this made absolutely no change, the scratching noise is still the same.
My PC runs Linux and Windows, the scratching noise is the same on both OS, so it's probably not a software configuration issue.
Any suggestion ? :)