BALANCE
The Balance knob adjusts the relative volumes of the bass and
treble speakers. Use it much like you would an equalizer,
adapting the unit's sound to suit different types of input signals
and the musical context, amp, or monitor.
Twisting it to the right from the 12 o'clock position cuts low
frequencies; turning it to the left cuts higher frequencies.
DRIVE
This knob activates VENTILATOR II's on-board tube simulator.
To make the most of the Drive section, ensure you dial in the
optimum input level as described in the section above entitled
Overload LED. Then set the instrument's volume to the
maximum level and twist VENTILATOR II's Drive knob to dial
in the maximum distortion level. This lets you ride the
instrument's volume pedal or knob to control the amount of
saturation, which is a convenient and musically expressive way
of modulating between clean and distorted sounds on the fly.
The Drive section is level-compensated; that is, the output level
does not change much as you turn up the Drive knob.
MIX / DIST LO
This controls the mix of the lower rotor in the signal as well as
the distance of the virtual mic from the rotor. The first half of
the travel (from all the way counter-clockwise to center)
determines the mix. At 7 o'clock (all the way counter-clockwise)
there is no lower rotor simulation in the mix. Note this does not
remove the bass content from the signal; it simply removes the
rotary effect. You can use this to emulate the classic "Memphis
style" Leslie sound. The "Memphis style" on a real Leslie is
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