Endorphin.es Squawk Dirty to Me
Stereo zero-delay feedback VCF with 8 dirty modes
6 HP Eurorack module
Squawk Dirty to Me is a 6HP stereo voltage-controlled filter by Endorphin.es featuring 8 zero-delay feedback filter modes derived from the Grand Terminal module. It offers true stereo processing, a dedicated hi-pass filter in series, a post-filter VCA, and a meta CV scanning mode that morphs continuously across all 8 filter types, making it a highly versatile and musically expressive filter for both subtle tone shaping and aggressive sound mangling.
Features
- 6HP stereo VCF with 96 kHz 16-bit digital audio processing
- 8 filter modes: Transistor Ladder LP, MS-20 OTA LP, Lo-Pass Gate non-resonant, Resonant Lo-Pass Gate, DJ Bipolar State-Variable, High-Pass, Band-Pass, Comb Filter
- All 8 filters use zero-delay feedback topology (Grand Terminal derived)
- Meta CV scanning mode morphs continuously across all 8 filter types
- Attenuverter (polarizer) for Meta CV input
- Dedicated hi-pass filter in series before the main filter
- Post-filter stereo VCA with unattenuated CV input (0 to +5V)
- True stereo processing with separate In 1 / In 2 and Out 1 / Out 2
- Input 1 normalled to Input 2 for mono-to-stereo operation
- Manual cutoff, resonance, and HPF knobs act as attenuators when CV is patched
- All CV inputs range 0 to +5V
- All Access Pass mode: allpass delay on Out 2 for stereo widening up to 1/3 second
Controls & Jacks (23)
- Meta CV Attenuverter — Polarizer/attenuverter for incoming meta CV signal; sets amount of polarized CV added to manual filter type offset
- Cutoff Frequency — Manual control for filter cutoff frequency; acts as attenuator when CV is applied
- Mode — Short press cycles through 8 filter types; long press enables meta filter scanning; extra long press enables all-pass mode
- Resonance — Adjusts the emphasis (resonance peak) of the frequency, bandwidth, or vactrol decay depending on filter type; acts as attenuator when CV is
- Cutoff CV — Unattenuated CV for cutoff frequency (0...+5V)
- Audio In 2 — Secondary audio input for stereo operation
- Resonance CV — CV for resonance control (0...+5V)
- Filter Mode LEDs — 4 white LEDs showing currently selected filter type (I-VIII); semi-lit indicates V-VIII modes, fully lit indicates I-IV modes
- HPF CV — CV for high-pass filter with attenuator (0...+5V)
- Audio Out 1 — Left channel filtered audio output
- VCA CV — Unattenuated CV for post-filter VCA (0...+5V)
- Audio In 1 — Primary audio input; internally normalled to input 2
- Status — Status indicator for firmware updates and mode selection; blinks blue during update, red if signal level is incorrect
- Audio Out 2 — Right channel filtered audio output
- out 1 audio out 2
- VI
- Allpass Stereo Spread — Visual indicator showing the stereo spread amount in all-access pass mode; 4 LEDs visualize delay from 0ms to 1/3 second
- HPF (High-Pass Filter) — Manual control for high-pass filter cutoff; acts as attenuator for HPF CV input; in all-pass mode, sets allpass delay amount for OUT 2
- Meta CV Attenuverter (Polarizer) — Polarizer/attenuverter for incoming meta CV signal; sets amount of polarized CV added to manual filter type offset
- Stereo Spread LEDs — Visual indicator showing the stereo spread amount in all-access pass mode; 4 LEDs visualize delay from 0ms to 1/3 second
- in1_trim — Backside trimmer for audio input 1 level — CCW for modular level, CW for line level
- in2_trim — Backside trimmer for audio input 2 level — CCW for modular level, CW for line level
- Meta CV — CV for filter type scanning in meta mode (0...+5V)
How-To Guides
- Save All Access Pass Stereo Width Setting
- Update Firmware via Audio Playback
- Buchla Bongo Percussive Pings
- DJ Isolator Filter Sweep
- Comb Filter Flanger and Resonator
- Continuous Filter Type Morphing via Meta CV
- Mono Source Stereo Spread with Allpass
- True Stereo Filter for Stereo Sources
- MS-20 Dirty Resonant Bass
- Band-Pass Formant Vowel Sounds
- Classic Ladder Filter Evolving Pad
Explore the interactive Squawk Dirty to Me panel on BleepDex — tap any control to learn what it does.
