EQ and Filters 018: Stereo Random Filter
781
018: Stereo Random Filter
This stereo band pass filter is modulated by an LFO, using
either a step-shape waveform and or a sample-and-hold
shape. The filter will also self-resonate, for creating special
effects.
FILTER
Manual [0…100]
Sets the filter’s center frequency, before LFO modulation.
Depth [0…100]
The LFO modulates the filter’s frequency; this sets the
intensity of the LFO modulation.
Source [Off…Tempo]
Selects a source to modulate the LFO Depth.
Amount [+/–100]
Sets the intensity of the Depth modulation.
Resonance [0…100]
Resonance emphasizes the audio around the filter’s center
frequency.
At 0, there is no emphasis, and frequencies outside the center
will simply diminish smoothly.
At medium settings, the resonance will alter the timbre of the
filter, making it sound more nasal or extreme.
At very high settings, the resonance can be heard as a
separate, whistling pitch. At 100, the filter will self-oscillate
(after being fed an initial burst of input).
LFO
Waveform and Phase
Waveform [Step-Tri, Random]
Step-Tri creates a steppy triangle waveform (see the
diagram below). The LFO Frequency parameter sets the
original triangle waveform speed, and the LFO Step Freq
parameter adjusts the width of the steps.
Random produces a sample-and-hold waveform, with the
speed controlled by the Step Freq.
Phase [degrees] [–18…+18]
This sets the LFO phase difference between the left and
right, in steps of 10 degrees. Offsetting the left and right
phases alters how modulation is applied to the left and right
channels, creating a swelling effect.
Frequency
These parameters apply when MIDI/Tempo Sync is Off
(un-checked).
Frequency [Hz] [0.02…20.00]
This sets the speed of the triangle waveform, in Hz.
Step Frequency [Hz] [0.05…50.00]
This sets the speed of the steps, in Hz.
Source [Off…Tempo]
This selects a modulation source for both the Frequency and
the Step Frequency. You can set the modulation amounts
individually, below.
Amount [–20.00…+20.00]
Sets the Frequency modulation amount, in Hz.
Step Amount [–50.00…+50.00]
Sets the Step Frequency modulation amount, in Hz.
MIDI/Tempo Sync
MIDI/Tempo Sync [Check-box]
When this is on, the LFO speed is set by BPM, Base Note,
and Times, instead of Frequency. For more information, see
“MIDI/Tempo Sync” on page 779.
BPM [MIDI, 40.00…300.00]
MIDI syncs to the system tempo. 40-240 sets the tempo
manually for this individual effect.
Base Note [ … ]
Times [x1…x32]
These set triangle waveform’s base note and multiplier. For
more information, see “MIDI/Tempo Sync” on page 779.
Step Note [ … ]
Times [x1…x32]
These set the step’s base note and multiplier. For more
information, see “MIDI/Tempo Sync” on page 779.
Filter
Left
Right
Wet / Dry
Wet / Dry
Stereo In - Stereo Out
Filter
LFO Phase
LFO: Step-Tri/Random
Step Frequency
LFO Frequency
Step Frequency
Step-Tri
Random
Random Filter LFO
0 +90
+180 [degree]
0 [degree]
–90
–180
LFO Phase
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