GFI System ROSSIE User Manual page 9

8. Algorithms
8.3 Manual Filter
This mode offers a set of filters whose resonance frequency is manually controlled via a knob or
an expression pedal.
Rossie as a Wah pedal
- Map the expression pedal to the frequency parameter (Param knob).
- Set the desired Heel and Toe values.
- Select filter type to Lowpass or Bandpass.
- Select one of the Taper styles to your liking.
PARAM knob - adjusts the resonance frequency of the filter.
RANGE knob - adjusts the amplitude of the steps.
MIX knob - adjusts the wet and dry mix.
Secondary parameters
Taper:
Taper 1

Taper 2

Taper 3

Taper 4

TAPER 2
TAPER 4
TAPER 3
Q (filter bandwidth)
Low

Medium

High

Sharp

Higher setting gives more pronounced
filtering
The potentiometers in wah pedals
have different taper characteris-
tics, which determines the feel as
TAPER 1
the rocker sweeps through its
(linear)
sweep range.
Rossie provides 4 different taper
styles to choose from. Choose one
that feels best for the application
at hand.
8
User Manual
R O S S I E
FILTER
Filter Types:
Lowpass

Bandpass

Highpass

Peaking
