Decay
How long the reverb rings out.
- Turn up Bigger, longer spaces.
- Turn down Short room / drip — dies away quickly.
Pedals / Spring-style room
Spring Well
Spring-style room · play-tested
seth — fish
seth@ninevolt:~$
Knobs
In the TUI each knob runs from low (left / 0%) to high (right / 100%). Start near noon, then nudge while you play.
Tone
Brightness of the reverb tail.
- Turn up Airier, brighter reflections.
- Turn down Darker, dunkier spring character.
Mix
Dry guitar versus reverb.
- Turn up Wet, washed-out ambience.
- Turn down Mostly dry with a hint of space.
Inspired by
Fender spring reverb tank — metal springs, transducer drive, pickup return. Short, splashy, surf-and-shoegaze room rather than hall IR. Ninevolt display name Spring Well; Decay ≈ tank dwell / feedback, Tone ≈ damping (dark ↔ bright springs), Mix dry/wet. Schroeder comb + allpass network (DAFX Ch. 6) — not a convolved IR pedal.
Not delay — no discrete repeats (Ana Echo, Memo Man). Not BBD mod — see TIME_MOD_COMPARISON.md.
Signal path
| Step | What it does |
|---|---|
| Tank input pad | Scales drive into combs when Mix is high — avoids clipping on chords. |
| 4× parallel combs | Prime-length delays (~35–72 ms @ 44.1 kHz, scaled to sample rate) — spring “boing” modes. |
| Tone LP per comb | One-pole damping in feedback path — Tone 1.2–8 kHz. |
| Feedback × Decay | Decay → 0.62–0.96 feedback; tanh soft limit in loop. |
| Allpass diffuser | Single AP smears comb metallicness. |
| Wet makeup | 1.18–1.73× on wet bus (compensates comb sum level). |
| Dry / wet Mix | Linear blend; clamp ±1. |
Simplifications
- Mono in/out - Fixed comb topology (not per-knob spring count) - No input/output transformer color - No drip noise burst model - True bypass