10.6

Table Of Contents
357Logic Pro Instruments
Note: The Oscillator 1 sine wave generator always generates a sine signal at the
frequency of Oscillator 1.
LFO knob: Set the strength of filter cutoff frequency modulation with the LFO. Positions
further away from the centered (off) position make modulation more or less intense. See
Logic Pro Retro Synth LFO and Vibrato.
Filter Env(elope) knob: Set the strength of filter cutoff frequency modulation with the
Filter Envelope. Positions further away from the centered (off) position make modulation
more or less intense. See Logic Pro Retro Synth envelopes.
Logic Pro Retro Synth filter types
Retro Synth provides multiple filter types.
Retro Synth filter types: lowpass, bandpass, highpass
A lowpass (LP) filter passes the portion of a signal below a specified cutoff frequency and
rolls off the portion above that frequency. A bandpass (BP) filter passes the portion of a
signal occupying a band surrounding the cutoff frequency and rolls off the portions above
and below that band. A highpass (HP) filter passes the portion of a signal above a specified
cutoff frequency and rolls off the portion below that frequency.
There are multiple two-pole, four-pole, multi-pole state-variable and analog-modeled LP,
BP, and HP filter designs in Retro Synth, each with distinctive characteristics that you may
prefer for a given purpose. The available LP, BP, and HP filter designs include Creamy,
Edgy, Gritty, Lush, Lush (Fat), and Sharp variants.
Creamy: Multi-pole state-variable filter.
Edgy: Two- or four-pole analog-modeled filters. Four-pole variants provide a steeper
roll-off of frequencies beyond the cutoff.
Gritty: Two-pole filters designed to saturate heavily at higher Resonance and Drive
settings.
Lush: Four-pole lowpass analog-modeled filters.
Lush (Fat): Four-pole analog-modeled filters.
Sharp: Two-pole analog-modeled filters.
The three principal filter controls have standard functions for all filter types.
Cutoff: Controls the filter cutoff frequency.
Resonance: Controls the filter resonance or emphasis. Higher settings boost
frequencies in the immediate vicinity of the cutoff frequency.
Drive: Allows the filter to be overdriven; the precise effect varies with each filter design.