Rate
Speed of the whoosh / jet-plane sweep.
- Turn up Faster sweeps.
- Turn down Slow, dramatic sweeps.
Pedals / Flanger
Classic Flange
Flanger · 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.
Depth
How deep the sweep travels.
- Turn up More extreme whoosh.
- Turn down Subtle thickening.
Feedback
Resonance of the flange.
- Turn up More metallic, hollow, “jet” character.
- Turn down Softer, less resonant swirl.
Inspired by
Electro-Harmonix Electric Mistress (1976–1985, David Cockerell) — first flanger in a stompbox. SAD1024 BBD, comparator triangle LFO, VCO clock sweep. Andy Summers, David Gilmour, Robert Smith. Rate, Range, Color on the original; Filter Matrix (static comb) not modeled.
Signal path
| Step | What it does |
|---|---|
| High-pass ~95 Hz | Anti-alias / sub trim before BBD (Mistress input HPF). |
| Input LP ~7.5 kHz | Tames pick transients entering the delay path. |
| Triangle LFO | Rate → 0.06–2.2 Hz comparator-style ramp (not sine). |
| Modulated read | Depth (Range) sets center ~0.55–4.75 ms and sweep up to ~10 ms. |
| Recovery LP ×2 | BBD bandwidth limit; cutoff tracks delay / clock Nyquist. |
| Feedback × Color | Feedback → wet fed back into write; soft-limited near oscillation. |
| BBD saturate + write | Mild SAD1024-style write nonlinearity. |
| Comb mix | Fixed dry/wet blend (0.42 + depth × 0.38) — jet-plane notches. |
How we modeled it
Mistress signal path: HPF → split dry / BBD wet → Color feedback into write → modulated read → recovery LPs → dry+wet comb. Triangle LFO sweeps delay time; Feedback (Color) sharpens notches toward self-oscillation.
Simplifications
- Digital delay at audio rate (no VCO clock ripple or BBD resampling) - No Filter Matrix switch (manual static comb) - Not true through-zero (no crossfade at zero delay) - Mono only