Sorry for coming back to this after so long but I actually have the problem that I hear all this stuff while an extra power supply is connected!
I can, with or wihtout the extra power supply connected, actually see the laptops drive make noise in conjunction with the drive indicator light and even hear it when I move my pen over the connected drawing pad without actually touching it! So I connected a good seperate power supply to the Axoloti but that does not help.
This seems to suggest that the external power supply I use does actually not make the Axoloti switch away form the USB power line!
Only when I disconnect the USB cable does ther noise polution disappear. So don't connect it during recording is what you might say but the problem is that I (want to) use my Axoloti in "workstation mode", so constantly connected LIVE to the PC.
OK, my laptop is not top of the bill (Packard Bell) but I do not want to buy a whole new laptop or brand new battery pack for this single problem.
Do you have any suggestions? Could it fro instance be that the 1A output level of my power supply is to low?