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Chapter 1 Amps and pedals 51
Pedalboard lter pedals
This table describes the lter eects pedals.
Stompbox Description
Auto-Funk An auto-wah (lter) eect. Sensitivity sets a threshold
that determines how the lter responds to incoming
signal levels. Cuto sets the center frequency for the
lter. The BP/LP switch enables either a bandpass or
lowpass lter circuit. Signal frequencies just above and
below the cuto point are ltered when the BP switch
position is chosen. When the LP switch position is
active, only signals below the cuto point are allowed
through the lter. The Hi/Lo switch determines one of
two preset (lter) resonance settings. The Up/Down
switch activates a positive or negative modulation
direction—the “wah” ltering occurs above or below
the source signal frequency.
Classic Wah A funky wah eect, straight from 1970s TV police show
soundtracks. You control it by dragging the pedal.
Graphic EQ A classic 7-band EQ pedal.
Modern Wah A more aggressive wah eect. You control it by
dragging the pedal. Mode enables you to choose
from the following: Retro Wah, Modern Wah, Opto
Wah 1, Opto Wah 2, Volume. Each has a dierent
tonal quality. The Q knob determines the resonant
characteristics. Low Q values aect a wider frequency
range, resulting in softer resonances. High Q values
aect a narrower frequency range, resulting in more
pronounced emphasis.
Pedalboard dynamics pedals
This table describes the dynamics pedals.
Stompbox Description
Squash Compressor A simple compressor. Sustain sets the threshold
level. Signals above this are reduced in level. Level
determines the output gain. The Attack switch can
be set to Fast for signals with fast attack transients,
such as drums, or to Slow for signals with slow attack
phases, such as strings.