A ground loop eliminator is placed between the PC/laptop out and amp/mixer. The AC power is still grounded, as well as the rest of the system. Search <ground loop eliminators>, in the forum lots of posts on this subject. Later, Ray
Asus Q500A i7 Win 10 64 bit 8GB ram 750 HD 15.5" touch screen, BIAB 2017, Casio PX 5s, Xw P1, Center Point Stereo SS V3 and EWI 4000s.
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