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FILTER SECTION
Resonance
Cutoff
LP Lowpass
BP Bandpass
HP Highpass
RESONANCE fader sets how much the CUTOFF frequency is emphasized.
It creates a resonant peak in the spectrum, and when pushed even further,
it will make the filter ring out (pinging technique) or even self-oscillate.
CUTOFF MOD fader says how much of the signal connected to the
MOD input will affect the cutoff frequency. By default, the envelope is
normalized to the MOD input.
There are two audio inputs to the filter. The FILTER IN patch point, which
has the oscillator PULSE signal normalized to it, and the main INPUT,
equipped with a saturation pre-amp. You can plug a dummy cable to
the FILTER IN and set the resonance to the maximum to make the filter
self-oscillate and become an oscillator. You can also feed a signal to
the INPUT and drastically amplify it to overload the filter and change
its core characteristics. Try patching the TRI signal to the INPUT to get
more bass boost and saturation from the filter.
The POP is a unique and powerful timbral shaping tool of the SP2. It
fades from plain vanilla filter resonance response (SOFT) to more liquid
type filtering towards distorted digital sounding tones (PIXEL). It takes
a version of the OSC PULSE signal and feeds it to the cutoff frequency.
The sound of POP can be further affected by modulating the PWM
input with ENV, for example.
The POP has a CV input that is normalized to static voltage. This means
that as soon as you plug a signal into the POP CV input, the POP fader
will act as an attenuator for that signal. This is very useful when using
gate signals to bring in the POP character for specific steps (distorted
snare sounds or liquid slides).
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