Straightforward, swirly rotary effects

The DLS RotoSIM features a charmingly uncluttered user interface, sporting easy-to-understand controls.

"There's plenty more variation to be had if you fancy a tinker around inside the chassis"

A bypass switch turns the effect on, while a second footswitch toggles between slow and fast speeds that are set with a knob each.

A ramp knob sets how quickly the speed changes. Separate knobs adjust the top and bass rotor levels, and an authentically- voiced overdrive - with the level controlled by a single knob - can be brought in with a mini-toggle switch.

There's also plenty more variation to be had if you fancy a tinker around inside the chassis, with no less than seven more adjustments available.

All in all, cool sound and smooth operation from a great US boutique pedal.

MusicRadar Rating

4 / 5 stars

Loads of adjustment options. Lovely tones. Boutique build.


There's a boutique price, to match.


Classy sound coupled with an easy interface.

Battery/Adaptor Type

Nine-volt mains adaptor

Country of Origin



True bypass


145 x 80 x 130

Review Policy
All MusicRadar's reviews are by independent product specialists, who are not aligned to any gear manufacturer or retailer. Our experts also write for renowned magazines such as Guitarist, Total Guitar, Computer Music, Future Music and Rhythm. All are part of Future PLC, the biggest publisher of music making magazines in the world.

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