CHAPTER 21. LIVE AUDIO EFFECT REFERENCE 295
Low cut (cuts frequencies below the specied frequency);
Low shelf (boosts or cuts frequencies lower than the specied 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 specied frequency);
High cut (cuts frequencies above the specied 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
(Mac)
modier 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).
Enabling Hi-Quality mode via the (PC) /
(Mac) context menu can improve the
sound quality, particularly with low frequency signals or when working at high sample rates.
There is a slight increase in CPU usage in Hi-Quality mode.
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