adjusting some of the settings via Remixbox can lesser this increase in volume. I've found that the procedure stated on this forum to set the volume (input and output) don't work for me.
i've got my input volume on the RMX set to just past the 2 o/c point and the output volume knob set to about 11 o/c and it seems much better.
you can alter the volume for the noise effect from within the Remixbox software.