Drive settings were quite illusive for me until I well understood the following (at least I think I understand - others please advise if I'm missing anything):
- With a drive block placed just before the amp, the drive level control will boost or cut the input of the amp depending on the drive level value and regardless of what the drive gain or drive mix is set to. So - if your drive block has a lowish level setting, your amp might seem to be less gainy than it should be even if your drive mix and drive gain settings are highish.
- As drive mix approaches 0%, drive gain settings diminish in the signal, HOWEVER, the effect of drive tone settings do not diminish. So, even with a drive mix set to 0, drive tone settings will still impact the drive output signal.
- When using a drive block with some level of drive gain, you are mixing drive distortion with amp distortion - many combinations can get somewhat ugly. Experimentation is needed to find the best drive block to go with a given amp usage scenario.
Given these behaviours one can sometimes unexpectedly reduce amp gain.
This may be obvious for many but foe me, it took a while to get my head around it so I could make good use of drive blocks.