Swell — Documentation¶
Welcome to the Swell documentation.
Swell is a 14-HP vacuum tube signal processor for Eurorack — a 4-pole LPF built around a Soviet military-spec subminiature valve, with CV-controlled filter cutoff and resonance, and full control over how the valve operates in the signal path.
New to Swell? Start with the Quick Start Guide (PDF) — panel anatomy, first-use settings, and sound design presets on a single sheet.
In this documentation¶
Overview¶
- About Swell — Overview, features, and use cases
- Installation — Power, mounting, and first use
- Safety Warnings — Handling the valve and module
Technical Reference¶
- Filter Overview — Filter section
- Valve Stage — Gain architecture, signal flow, and LED indicators
Operating Guides¶
- Operating Modes — Bias, Mode, Boost, Gain reference
- Valve Sound — The character and behaviour of the valve
- Swell as an Oscillator — Self-oscillation: pitch tracking, character, and patching
Documentation Changelog¶
v1.0 — June 2026 · First public release. Covers module hardware revision 1.0 (May 2026).
For documentation feedback, corrections, or support, use the contact form on the Bartola Instruments website.