Reference Manual

CHAPTER 21. LIVE AUDIO EFFECT REFERENCE 280
More than guitars
While Amp and Cabinet sound great with guitars, you can get very interesting results by
feeding them with drums, synthesizers or other sound sources. For example, try using Amp
with Operator or Analog to add analog grit to your digital sounds.
21.2 Auto Filter
The Auto Filter Effect.
The Auto Filter effect provides classic analog lter emulation. It can be modulated by an
envelope follower and/or an LFO to create moving lter effects. The envelope follower can
track either the ltered signal or an external sidechain source.
There are four different lter types: lowpass, highpass, bandpass and notch. For each type,
the X-Y controller adjusts frequency (to adjust, click and drag on the X-axis) and Q (also
called resonance; to adjust, click and drag on the Y-axis). You can also click on the Freq and
Q numeric displays and type in exact values.
Low Q values create a broad lter curve, while higher values introduce a narrow, resonant
peak to the sound. With bandpass ltering, Q sets the bandwidth of the passed signal.
The Quantize Beat control applies quantized modulation to the lter frequency. With Quan-
tize Beat off, frequency modulation follows the control source. Turning this feature on
updates the lter modulation rhythmically with stepped changes that track the master
tempo. The numbered buttons represent 16th notes, so, for example, selecting 4 as a
beat value produces a modulation change once per beat.