Hello,

I got another RME interface to have fun with and learn, this time the UFX, second-hand so not new, but supposedly fully working and in good condition,
I did a brief test and I really like it (quite more than my 802

but, I have one question regarding digital gain control on mic pres (inputs 9-10-11-12),
with no mic plugged, when I quickly turn up gains to max +65, indicated "volume" displayed by green lines in totalmix doesn't "rise" at same speed, and doesn't "settle" on same values for each pre, around -63 when gain is at +65 (my common math tells me that's probably okay) though strangely sometimes settle at -99 or so, randomly for random inputs,
I carefully routed this into headphones to observe what's going on, and it appears there's a minor pop or buzz or sequence of pops when quickly turning the gain up (again, I think that's okay), but sometimes the gain gets turned up with slight delay of 1-2 seconds max (this is something I'm not sure if it's perhaps due to power design of the unit maybe?),
when I plug in a decent dynamic mic (senn 835), there appears to be no excessive noise, indicated volume in totalmix is roughly around similar -60's in a silent environment, haven't tested UFX with all 4 inputs plugged with mics yet,

is this usual behaviour of UFX digital gain pre's?
I quickly went through similar topics at rme forums, some of which clearly indicate some faulty things, but I don't feel such behaviour is certainly a sign of any fault, maybe little aging, or maybe design "exception", when no mic is plugged?

thanks in advance