ROON 1.6 has a nice set of DSP controls but they are hard to adjust using the graphic controls. When viewing the graph the finest vertical scale factor I can select is 3dB per division which is too coarse on a iPad sized screen. I can use the sliders below but they too allow way too much range, more that 12dB is too much. I suggest reducing the most zoomed screen to 2dB per division and limiting the controls to no more than+/-12dB.
Also it would be very handy to have the current preset displayed on the adjustment screen.