ThoNohT said:
Anyone may feel free to correct me if I'm wrong, but I don't believe that will make any difference.
Increasing the volume is done digitally, which means there is no quality loss. So all noise that is there is also there with the lower volumes, you just don't hear it as well. This also means that doubling volume, or quadrupling it and then halving it with the slider should have the same effect. (Save perhaps different scales on both those controls, but I also believe both are linear)
think of each stage of boost as a separate device.
Let's use an extreme example:
Over-maxed mp3 player (stage 1, mic boost) -> speakers ( stage 2, volume control on main interface).
The mp3 player is already already putting out distorted lows, screechy highs, etc. Controlling the volume through the speakers at stage 2 will only increase or lower the volume of a already distorted input.
That's why when you're connecting multiple sound devices with their own amps (ipod to hi-fi via analog, for example), you don't max out the source. The source should be at 50%, or about 80% max, then you increase the volume to the desired level on the hi-fi.
I guess it'll be fine in the long run personally because I'm looking to get a mic pre-amp, but I'm pretty sure there will be people out there who are more picky than me who will surely appreciate a small touch like a mic boost with smaller increments.