In "Line In", the 722 and 744t have stepped gain controls with steps at 0.1dB. I had some concern that this would be audible in some way, but having run nearly all line-in on my 722, I can say with certainty that it's not an issue at all. My only complaint about the gain on the 7 series is that it shows the readout in dB on the LCD only while you're making an adjustment or for a split second afterward.
- Jason