Keeley Electronics Dyno My Roto

The Keeley Electronics Dyno My Roto is a three-in-one modulation pedal that puts chorus, rotary speaker simulation and flanging in a single stompbox. MusicRadar reported its release in December 2016, with a launch price of $169¹. It was designed by Robert Keeley, whom MusicRadar described as a "pedal guru" dropping "yet another tonesome pedal"¹.

Three modes, one pedal

Pedal of the Day called the Dyno My Roto "a 3-in-1 modulation machine offering some classic sounds in a pedalboard-friendly little package"². The three sides of the pedal are:

• Chorus: a three-voice design built on three LFOs, aimed at 1980s vintage rack chorus sounds
• Rotary Cabinet: a Leslie Cabinet simulator with a Proximity control for depth and distance
• RotoFlange: a rotary flanger with a simple negative feedback control

Delicious Audio's buying guide, written by Christopher Scapelliti, places it in the rotary category as "both a Leslie simulator and a chorus and flange pedal"³.

The chorus: three voices instead of two

Most chorus pedals use a two-voice design. The Dyno My Roto instead uses three LFOs to produce a three-voice chorus. Pedal of the Day put it this way: "The magic to the chorus sound in the Dyno My Roto is the three LFOs that give you lush modulations that truly sing out"². The same review said the pedal lets players "finally get those 80's vintage rack chorus sounds"², and its reviewer concluded that "The Chorus tones here on the Dyno My Roto are incredible... and they're only a third of what the pedal can do"².

For a player comparing this with a standard two-voice chorus, the extra voice is the headline difference: the chorus mode uses three LFOs producing a three-voice chorus, versus the typical two-voice design. For more on the effect type, see Chorus Pedals².

Rotary Cabinet and the Proximity control

The Rotary Cabinet mode is a Leslie Cabinet simulator, the rotating-speaker sound long associated with organ rigs and, by extension, guitar players chasing that swirl². Its Proximity control adjusts how far away you are from the spinning speaker cabinet, adding depth and distance, something like a reverb control for the rotary effect². MusicRadar's 2016 report described the same function as "a rotary sound with adjustable proximity to add depth and distance," handled by the texture control¹. Scapelliti summed it up as a control "to impart mic-and-cabinet emulation"³, so the rotary can sit close and immediate or further back in a simulated space.

RotoFlange mode

The third mode, RotoFlange, is a rotary flanger. Keeley built it around a simple negative feedback control, which Pedal of the Day said makes it easy to use while covering a wide range of flanging sounds². MusicRadar's report on the pedal's launch likewise described "a roto flange with negative feedback control"¹. If flanging is the mode you are most interested in, Flanger Pedals covers the wider field.

Where it sits in Keeley's range

Keeley has returned to the rotary idea since the Dyno My Roto. In December 2024 the company launched the Keeley Rotary, a stereo Leslie emulation pedal at $229, and in 2024 also released the I Get Around rotary simulator alongside the California Girls 12 String Simulator. Keeley also makes the Seafoam Chorus, a straightforward chorus, and the Super Mod Workstation, a multi-modulation pedal. The Dyno My Roto remains the model that bundles chorus, rotary and flanger in one box.

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