Hi, I am new to modular and my first purchase has been an Arturia RackBrute 6U housing. Even with just a single module installed the unit is creating an annoying 1.5kHz tone, which is clearly apparent when monitoring and in audio recordings. I suspect that this is being generated by the Arturia power supply unit and must surely be a hardware fault. Has anyone else come across this? I have seen one or two comments on the Arturia forum about this and wondered if it was a well known problem in this community. Thanks!
And if all else fails, dump the Arturia AC supply altogether. Personally, I really don't think a lot of switching-type supplies in audio-critical or RF-critical applications unless they're specifically engineered for them. Changing to a linear supply might be a bit inconvenient, but the stability of linear supplies plus their working method ensures not only much lower noise figures but also better stability. Plenty of suitable linear supplies from the likes of Tektronix, Hewlett-Packard, et al can be found on eBay...just make sure to overspec the current capacity by at least 1/3rd (if not more) to deal with inrush currents on switch-on, and choose something that's in good, calibrated working order.