User Manual

Table Of Contents

24 Filter 1 & 2

Dave Smith Instruments

Filter 1 & 2

Filters take the basic, raw sound of the oscillators and subtract frequen-

cies, changing the harmonic content and thereby the character of the

sound. This change can be varied over time using a lter envelope to

produce more dynamic, animated timbres. The Pro 2’s two-lter architec-

ture allows for a wide range of sonic possibilities and is one of its most

exciting features. Filter 1 is a 4-pole, 24 dB per-octave, analog resonant

low-pass lter. Filter 2 is a 2-pole, 12 dB per octave, analog state-variable

lter with low-pass, notch, high-pass, and band-pass modes.

The two lters can operate in series or in parallel with the

filter routing

knob providing a variable mix of both modes. Used in series, audio is

passed rst though Filter 1 then Filter 2. Used in parallel, audio is passed

simultaneously through each lter individually.

For even more processing exibility, the

oScillator Split switch allows

you to send oscillators 1 & 2 to Filter 1 and oscillators 3 & 4 to Filter 2.

Oscillator Split Enable

Enable BP

Link Filters

Cuto

Resonance

LPFilter Routing HP

Notch

FILTER 1: LOW-PASS

FILTER 2: STATE-VARIABLE

In addition to the front panel controls for each lter, there are also several

parameters accessible through the OLED display.