The gain knob is very helpful for setting up the proper gain staging for all the effects in the effects bin and the Pro Chanel (among other things ) .Once I start populating my tracks with effects , I do not want to be fooled into thinking that louder is better just because I have placed an effect on the track
I want to hear what the effect is bringing to the table at the same volume as what my track was set to in the mix I have been running ...
There are many other uses for the gain knob ,,,sends, busses and ect ect ...
Some guys even like keeping their Console view track faders set at 0 db and adjusting their gain knob to help with the visual across the console .
I personalty don't
Another useful thing the gain knob can help with is if you have a very dense mix with a lot of tracks , I have found that there are times when a musical phrase on one track may send the master into the red ...
If you loop that section of the mix you can figure out which phrase may be causing the problem ..
Often times you wont even have to solo the individual tracks to find the offender ...
Once found , I have often used the gain knob on the track that was causing the problem . I will set the volume level down from the gain knob the few db the track needed to keep it from causing a visual over ....
PS this works best if you don't have the metronome going
that puppy always brings stuff into the red the way I have mine set
all the best,
Kenny