I have a quattro and recently while using it with my new emachine laptop i noticed a lot of noise. Hum, usb noise when lots of data was being accesses from the hd.
Do other IO boxes do this? The quattro does not do this on my mac.
Thanks
This is a common issue on laptops, the power supply induces noise in the "ground" of the laptop which you need to isolate from your source with a DI box. or run on batteries.