Endorphin.es Squawk Dirty to Me

Name: Squawk Dirty to Me
Brand: Endorphin.es

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
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)
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

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.