Reference Manual

CHAPTER 21. LIVE AUDIO EFFECT REFERENCE 300
mode uses a single curve to lter both channels of a stereo input equally. L/R mode provides
an independently adjustable lter curve for the left and right channels of a stereo input; M/S
mode (Mid/Side) provides the same functionality for signals that have been recorded using
M/S encoding.
When using the L/R and M/S modes, both curves are displayed simultaneously for reference,
although only the active channel is editable. The Edit switch indicates the active channel,
and is used to toggle between the two curves.
The lters can switch between six responses. From left to right in the display, these are:
Low cut (cuts frequencies below the specied frequency);
Low shelf (boosts or cuts frequencies lower than the specied frequency);
Bell curve (boosts or cuts over a range of frequencies);
Notch (sharply cuts frequencies within a narrow range);
High shelf (boosts or cuts frequencies higher than the specied frequency);
High cut (cuts frequencies above the specied frequency).
Each lter band can be turned on or off independently. Turn off bands that are not in use
to save CPU power.
To edit the lter curve, click and drag on the lter dots in the display. Horizontal movement
changes the lter frequency, while vertical movement adjusts the lter band's gain. To adjust
the lter Q (also called resonance or bandwidth), hold down the
Alt
(PC) /
Alt
(Mac)
modier while dragging the mouse. Note that the gain cannot be adjusted for the low cut,
notch and high cut lters. In these modes, vertical dragging adjusts the lter Q.
You can also use the numbered lter selector buttons to select a band for editing, and then
edit parameter values with the Freq, Gain and Q dials (and/or type values into the number
elds below each dial).
To achieve really drastic ltering effects, assign the same parameters to two or more lters.
As boosting will increase levels and cutting will decrease levels, use the global Gain eld to
optimize the output level for maximum level consistent with minimum distortion.
The Scale eld will attenuate the gain of all lters that support gain (all except low cut, notch
and high cut).