As of right now, the MixPre6 is USELESS IMO to me! You CANNOT adjust the gain for the recorder part of the deck with the nice, big gain knobs on the front! You HAVE TO go through the menu to be able to adjust the gain "post-fade"
This is straight from the MixPre6 Manual
In Advanced Mode, the MixPre-6 is configured as a eight-channel recorder with
user-selectable 44.1, 48, 96 and 192 kHz sample rate and 16 and 24bit depth.
The LR mix tracks may be recorded as well as each of the six channels as
individual isolated (ISO) tracks. Audio for the ISO tracks is recorded “prefade”
meaning before the channel knob gain, so any changes that are made there
will only affect the LR mix and have no affect on the recorded ISO track levels.
This is particularly useful for post-production audio processing where it may be
desirable to create an alternate mix of the tracks at a later stage.