User's Manual

516 Live Instrument Reference
The OSR circuit option is a state-variable type with resonance limited by a unique hard-clipping
diode. This is modeled on the filters used in a somewhat rare British monosynth, and is available
for all filter types.
The MS2 circuit option uses a Sallen-Key design and soft clipping to limit resonance. It is mod-
eled on the filters used in a famous semi-modular Japanese monosynth and is available for the
lowpass and highpass filters.
The SMP circuit is a custom design not based on any particular hardware. It shares characteris-
tics of both the MS2 and PRD circuits and is available for the lowpass and highpass filters.
The PRD circuit uses a ladder design and has no explicit resonance limiting. It is modeled on the
filters used in a legacy dual-oscillator monosynth from the United States and is available for the
lowpass and highpass filters.
The most important filter parameters are the typical synth controls Frequency and Resonance.
Frequency determines where in the harmonic spectrum the filter is applied; Resonance boosts
frequencies near that point.
When using the lowpass, highpass, or bandpass filter with any circuit type besides Clean, there
is an additional Drive control that can be used to add gain or distortion to the signal before it
enters the filter.
The Morph filter has an additional Morph control which sweeps the filter type continuously from
lowpass to bandpass to highpass to notch and back to lowpass.
Tip: you can quickly snap the Morph control to a lowpass, bandpass, highpass, or notch setting
via dedicated options in the [right-click](PC) / [CTRL-click](Mac) context menu of the Morph
slider.
To the right, the filter’s cutoff frequency can be modulated over time by a dedicated filter en-
velope. This envelope works similarly to the envelopes in the Pitch/Osc tab, with Initial, Peak,
Sustain and End levels, ADSR, Loop mode and slope points. This area is toggled on/off with the
F. Env button. The Amount slider determines how much influence the filter envelope has on the
filter’s cutoff frequency, and needs to be set to a non-zero value for the envelope to have any
effect.
Below the Filter is a waveshaper, which is toggled by clicking the Shaper button. Four differ-
ent curves can be chosen for the waveshaper in the Type selector: Soft, Hard, Sine and 4bit.
Shaper’s overall intensity can be controlled with the Amount slider. In addition, the signal flow
direction can be adjusted with the button above the waveshaper area: with the triangle pointing