I just bought USB Audio Player PRO, and its 10 band parametric EQ function. However, I'm unfamiliar with the filter terms they use, after using Peace GUI EQ on Windows. Can someone tell me what the peak, Low Shelf (Q as slope), High Shelf (Q as slope) filters are on USB audio player pro? Any help is appreciated! These are the filter options on UAPP. Not sure the difference between Low/High shelf 1 and 2.