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FILTERS
Technically, Moog One employs three analog Filters to provide dynamic tone-sculpting. A pair of State
Variable Filters (SVF) function as a single unit; their conguration is determined by their parameter
settings. The third lter is a classic Moog transistor Ladder Filter. The SVF and Ladder Filter can run
side by side in the Parallel mode, or they can feed from SVF into the Ladder using the Series mode.
This combination of Filter types and routings provides extensive control of the timbre, harmonic
content, and nal character of the sound. In turn, this exibility allows Moog One to recreate a vast
array of lter schemes that have appeared in countless classic (as well as obscure) synthesizers and
modules, and also combine them to create completely new, unique sounds.
In both the State Variable Filter (SVF) and Ladder Filter, the basic parameters are the same. The
CUTOFF knob species the operating frequency of the Filter. The Cutoff Frequency may represent an
upper frequency limit, lower frequency limit, or center frequency value, depending on the Filter MODE
selected. The RESONANCE knob routes a portion of the Filter’s output signal back to the input of the
Filter, emphasising the Cutoff Frequency. The Cutoff Frequencies of the SVF and Ladder Filter can be
linked together and operated simultaneously from either CUTOFF knob.
NOTE: When designing sounds, remember that each source can be routed to either Filter individually, or
to both.
STATE VARIABLE FILTER (SVF)
The SVF is constructed using two identical lter circuits that together behave as one; their
arrangement and interaction is determined by the choice of NOTCH, Bandpass (BP), High Pass (HP), or
Low Pass (LP) Modes on the Front Panel, and by other parameters located in the Filter MORE page.
CUTOFF (20Hz to 20kHz)
Rotate this knob to set the operating frequency of the SVF
Filter. The function of the selected frequency will depend on the
selected Filter MODE.
RESONANCE (0 to 10)
As the value of the RESONANCE knob is increased, more emphasis
is applied at the Cutoff Frequency of the Filter. This will boost the
prominence of any harmonic content in your sound that is at or near
the Cutoff Frequency.
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