I have the same concern... why can't the UFX be adjusted in the 0-10db range in 1db increments? The first test I did with the UFX was to record some drums.
I used a Shure 57a Beta on snare (industry standard mic for a snare drum).
Result:
0db too quiet - only just going in to yellow at full pelt on the drums.
+10db is too loud - giving occasional clipping.
8db would be perfect, why is there no 8db???
The only reference I could find in the manual (with no explanation, which is ambiguous at best, misleading and doesn't mention the first 10db of the mic pre stage being unusable!!) was this:
"The four balanced microphone inputs of the Fireface UFX offer a digitally controlled gain of 0 to
65 dB via XLR/TRS combo jacks. The gain range is 65 dB, adjustable in 1 dB-steps over a range
of 55 dB. The soft switching, hi-current Phantom power (48 Volt), switchable per channel,
provides a professional handling of condensor mics. Up to a level of +12 dBu, the front XLR
input can also be used as Line input."
So what is the reason? Can it be rectified?