Time
How long after you play before the echo repeats.
- Turn up Longer delay — spacious echoes.
- Turn down Short slapback — tight rockabilly-style repeats.
Pedals / Analog delay
Ana Echo
Analog delay · 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.
Feedback
How many times the echo repeats.
- Turn up More repeats that can trail into ambient wash.
- Turn down One or two quick repeats.
Mix
Loudness of the echoes versus your dry guitar.
- Turn up Echoes more upfront.
- Turn down Mostly dry with quiet trails.
Tone
Brightness of the delayed repeats.
- Turn up Brighter, clearer echoes.
- Turn down Darker, murkier trails (more “tape/analog” feel).
Inspired by
Boss DM-2 bucket-brigade analog delay — MN3005, 4096 stages, NE570 compander, 20–300 ms echo. Same BBD delay family as the EHX Memory Man, without the chorus/vibrato LFO (Memo Man covers that). Fixed delay only — see TIME_MOD_COMPARISON.md vs modulated pedals. Used for slapback and ambience in rock profiles.
Signal path
| Step | What it does |
|---|---|
| Delay read | Time sets 20–300 ms; fractional interpolated tap. |
| Recovery LP ×2 | Darkens repeats; cutoff tracks clock Nyquist × Tone. |
| Feedback × Intensity | Wet tap scaled by Feedback; soft-compressed when hot. |
| Write sum | Full-level input + compressed feedback (new notes stay clear). |
| Anti-alias LP + BBD saturate | Pre-write filtering and mild BBD nonlinearity. |
| Output mix | Mix blends dry input with wet delayed tap. |
How we modeled it
DM-2-style wet chain: read → recovery LPs → feedback compress → input + fb → anti-alias → BBD write. Time (20–300 ms), Feedback, Mix, Tone.
Simplifications
- Digital delay line at audio rate (no clock tick, no pitch warble when changing Time) - Sallen-Key stacks reduced to one-pole stages - No LFO modulation (Memory Man chorus/vibrato) - No compander noise or BBD clock bleed