The FOMOfx Virtual Jeff Wammy is a pitch shifter, octaver and harmonizer in one pedal, built by the Australian maker FOMOfx1. It belongs to the Virtual Jeff family, a line that began with the original Virtual Jeff, a device MusicRadar described as one that "allows you to add a whammy bar to any acoustic or electric" guitar2. The Wammy sits in the octave and pitch corner of a pedalboard, handling the jobs players usually spread across several pedals.
Power and practicalities
The Wammy runs on 9V DC, center negative, and draws 500mA1. That is a substantial current draw for a single pedal, well above what a typical daisy-chain output supplies, so it is worth planning a dedicated outlet on an isolated power supply rather than sharing with neighbors on the board.
At 500mA, the Virtual Jeff Wammy needs a power supply output that can deliver that current at 9V DC, center negative1.
RockBoard's PedalPedia page for the pedal links to an English manual as a PDF on the FOMOfx website1.
Where it came from: NAMM 2016 and the Virtual Jeff family
The Virtual Jeff line made its public debut at NAMM 2016, where MusicRadar tracked down FOMOfx for a video demo of the original Virtual Jeff, describing it as an instant whammy for any acoustic or electric guitar2. The pedal made an impression: Guitar World later noted that "Back at [NAMM] 2016, [FOMOfx won Best in Show for the Virtual Jeff]"3.
The line has since grown. Guitar World reports that "In 2021, [the unit was updated]" into the Virtual Jeff Pro, which the same article describes as "the VJP mounts onto guitars to digitally simulate the functionality of a whammy bar without being physically attached to" the strings, controlled via a plastic tremolo arm, and "a fully digital [whammy bar] compatible with both [acoustic guitars] and [electric guitars]"3.
Wammy versus Virtual Jeff Pro
The two pedals share a family name but differ in circuit and approach:
| Virtual Jeff Wammy | Virtual Jeff Pro | |
|---|---|---|
| Function | Pitch shifter, octaver, harmonizer1 | Digital whammy bar simulation3 |
| Circuit | Analog1 | Digital3 |
| How it works | Pedal format3 | Mounts onto the guitar, controlled via a plastic tremolo arm3 |
| Guitars | Compatible with acoustic and electric guitars3 |
RockBoard's PedalPedia page for the Wammy also points to community and player material, including a review thread on the reddit /guitarpedals community and a demo by Sophie Burrell1.
Videos
MusicRadar
FOMOFx
R.J. Ronquillo
Questions
What power supply does the FOMOfx Virtual Jeff Wammy need?
The Virtual Jeff Wammy runs on 9V DC, center negative, and draws 500mA. That current draw is high for a single pedal, so a standard low-current daisy-chain supply may not be enough. Plan for a dedicated outlet on an isolated power supply that can deliver at least 500mA at 9V.
Is the FOMOfx Virtual Jeff Wammy analog?
Yes. FOMOfx's product listing on RockBoard's PedalPedia gives the circuit type as analog, even though the pedal works as a pitch shifter, octaver and harmonizer. The related Virtual Jeff Pro, by contrast, is described in press coverage as a digital unit.
What is the difference between the Virtual Jeff Wammy and the Virtual Jeff Pro?
The Virtual Jeff Pro is the updated version of the original Virtual Jeff, revised in 2021. Guitar World describes the Pro as a digital whammy bar that mounts onto guitars to simulate whammy bar functionality without being physically attached to the strings, controlled via a plastic tremolo arm, and compatible with both acoustic and electric guitars. The Wammy is listed as an analog pitch shifter, octaver and harmonizer.
Where can I find the Virtual Jeff Wammy manual?
RockBoard's PedalPedia page for the Virtual Jeff Wammy links to an English manual as a PDF on the FOMOfx website, at fomofx.com. The manual covers the pedal's controls and setup in detail.
Sources (3)
- Virtual Jeff Wammy by FOMOfx, RockBoard PedalPedia, 2026
- NAMM 2016 Video: Virtual Jeff, the instant whammy for any acoustic or electric, demoed, MusicRadar, 2016-01-25
- FOMOfx vOL PRO lets you control your volume with a whammy bar, Guitar World, 2024-05-29
