Thanks for the reply.
from the manual…”INPUT GAIN Slider — Simultaneously controls the level of the input signal before entering the A/D Converter and the level of the output signal after the D/A Converter so that Input and Output are always at the same level. The gain before the A/D Converter increases as the slider is pushed upward. The INPUT GAIN Slider is an analog control and is not saved with the Foot Controller Presets. Ideally, you want to set the INPUT GAIN slider so that you have maximum signal level at the A/D Converter but does not clip the A/D.”
I see now, at first the operation did not make sense to me reading the instruction. I previously had a HOG2 which worked differently. Good to know there is no issue with this unit.