Squawk Dirty to me is a compact digital filter module based on the excellent filter from the Grand Terminal, now in stereo and with an additional high pass filter and integrated VCA on the output!
Featuring stereo IO, high pass filter, and optional output VCA, the main filter includes 8 modes:
• 24 DB/OCT TRANSISTOR LADDER zero-delay feedback low-pass filter: Modeled after the famous Minimoog filter.
• MS-20 12 DB/OCT zero-delay feedback OTA-low-pass filter: Be careful, that filter has very powerful and dirty resonance.
• 12 DB/OCT LO-PASS GATE, non-resonant zero-delay feedback filter where instead of the resonance, we control the DECAY closing time of the virtual vactrol. While ‘pinging’ Cutoff CV with a short pulse of voltage and adjusting the decay will give us that distinct ‘Buchla Bongo’ sound.
• 12 DB/OCT RESONANT LO-PASS GATE – variation of the zero-delay feedback vactrol filter model III with fixed fast decay and full control over the resonance. The resonance of the sound is ringing, just as it may be expected from a typical LPG.
• 12 DB/OCT DJ ISOLATOR-STYLE BIPOLAR zero-delay feedback state-variable filter: Sound is unfiltered when the Cutoff knob is in the middle/noon position. It filters high frequencies/low-pass, when turning the knob CCW and filters low frequencies/hi-pass, when turning the knob CW from its middle position.
• 12 DB/OCT HIGH-PASS STATE-VARIABLE FILTER: (zero delay feedback), single hi-pass on full knob range
• 12 DB/OCT BAND-PASS STATE VARIABLE zero-delay feedback filter with ‘cutoff’ knob you choose band’s centre point and with Resonance knob the width of the band.
• COMB FILTER: It recreates a series of harmonically related amounts of notch filters. In static state, it sounds similar to a phaser, but with modulation applied to the frequency it comes closer to a flanger.
Specifications:
- 120 mA +12V
- 15 mA -12V
- 0 mA 5V
- 30 mm deep
