XAOC Devices Sewastopol II
Send it out, bring it back, extract the voltage
10 HP Eurorack module
Sewastopol II is a multifunction eurorack interface module designed for bidirectional audio exchange between a modular system and external gear such as stompboxes, instruments, and studio equipment. It features a high-impedance preamplifier capable of accepting guitar and piezo signals, a unique bipolar peak-detector envelope follower, and a voltage comparator with hysteresis for generating gate and trigger signals. Its musical character is utilitarian and analytical — turning the outside world into modular control voltage while also sending modular signals out cleanly.
Features
- Balanced 6.3mm TRS export output suitable for line and professional level gear
- High impedance (10MOhm) import preamplifier accepting guitar, microphone, and piezo signals
- 0dB to +60dB import gain range with optional +20dB jumper boost on rear
- Exchangeable preamplifier on detachable board — ships with solid-state model 877ЛПМБ
- Built-in softclip circuit on import preamplifier
- Bipolar peak-detector envelope follower with near-instantaneous transient response
- Two switchable release time ranges (short and long) via toggle
- Switchable highpass filter (33Hz or 3kHz) before envelope follower input
- Filter affects follower only — Imported output remains full-band
- Envelope output available in both positive (Env Out) and inverted (Inv Out) polarity
- Multicolor LED monitoring of envelope signal
- Voltage comparator with adjustable threshold (Thresh knob)
Controls & Jacks (19)
- Env Release
- Release Range
- Threshold
- Follow
- Low End Cut
- Compare
- Env Out
- Inv Out
- Trig Out
- Gate Out
- To Export
- Imported
- Export Clip LED
- Import Clip LED
- Export Level
- Import Gain
- Export FX Send
- Import FX Return
- Port
How-To Guides
- Guitar Into Modular Via Sewastopol
- Modular FX Send/Return Loop
- Envelope Follower CV From Imported Audio
- Gate and Trigger Extraction From Audio
- Piezo Contact Microphone to Modular
- Sidechain Ducking With Inverted Envelope
- Guitar Through Stompboxes With CV Extraction
- Clean Modular Output to Mixing Desk
- Isolate Percussion From Complex Mix for CV
- Preamp Saturation and Distortion
Explore the interactive Sewastopol II panel on BleepDex — tap any control to learn what it does.
