# Zeta Systems Vibrato/Tremolo

> This modulation entry consolidates documented Zeta Systems Vibrato/Tremolo variants, controls, settings and roles across dated guitarist pedalboards.

- Canonical page: https://pedalboardarchive.com/pedals/zeta-systems-vibrato-tremolo/
- Machine-readable index of the archive: https://pedalboardarchive.com/llms.txt
- Evidence and reconstruction conventions: https://pedalboardarchive.com/methodology/

- **Category:** Modulation
- **Types:** Tremolo, Vibrato
- **Also known as:** Vintage Zeta Modulation, Zeta Vibrato/Tremolo
- **Controls:** Depth, Rate, Vibrato/Tremolo blend
- **Identification:** The model is identified.
- **Documented appearances:** 1 board, 2015

A rare vintage modulation unit combining amplitude tremolo and pitch vibrato in one enclosure.

## Documented boards

Each row is an observed appearance on a dated board. A position is only an observed one where that board's order evidence says so.

| Artist | Board | Date | Positions | Order evidence | Page |
| --- | --- | --- | --- | --- | --- |
| John Fogerty | Two-drawer offstage effects rack | 2015-05-03 | 4 | Reconstructed | https://pedalboardarchive.com/artists/john-fogerty/two-drawer-offstage-effects-rack-2015/ |