Universal Audio UAFX Modulation Machine Pedal

Astra Modulation Machine

The Pinnacle of Classic Chorus, Flanging/Doubling, and Tube Tremolo Effects.

Taking you deep down the rabbit hole of classic analog modulation, UAFX Astra Modulation Machine serves up the most sonically authentic bucket-brigade chorus/vibrato, studio flanger/doubler, and tube-driven tremolo effects ever placed into a single stompbox.

Built upon our powerful new UAFX dual-engine processing and unmatched levels of quirky analog realism, Astra delivers richly addictive vintage modulation, beautifully crafted to inspire you for decades.

Now You Can:

• Texture your tones with iconic Japanese bucket-brigade chorus/vibrato, circa 1976
• Quickly access sounds with Live/Preset modes, and play with silent switching, preamp coloration, and true/buffered bypass*
• Explore the outer limits with legendary rackmount bucket‑brigade studio flanging/doubling
• Download additional Phaser X90 and Dharma Trem 61 effects at product registration
• Get all the heavenly goodness of 1960's tube-driven tremolo, direct from your favorite American guitar amps
• Build your pedalboard around timeless UA design and robust craftsmanship, built to last decades

Flanger/Doubler: A Rackmount Studio Classic

Packed with late-'70s bucket-brigade tech, this classic rackmount studio flanger/doubler is famous for stunning whoosh effects, organic thickening, and a parade of wild sounds that go way beyond typical flanger boxes. Astra's Flanger/Dblr effect is the only end‑to‑end circuit emulation of this ultra‑rare unit, capturing its original features to a "T" and putting impossibly dense, complex flanging/doubling right at your feet.

Dual Stereo Modulation Engines for Endless Creativity

Astra's UAFX engine powers separate stereo instances of each modulation effect, thanks to its unique dual‑engine processing. It's like having two bucket-brigade hardware units running simultaneously — or even dual tremolo circuits — giving you a full stereo spread of complex, jaw‑dropping textures.

A State-of-the-Art Stompbox

With modern, high‑powered features like studio‑grade conversion, dual‑processing engines, additional downloadable effects at registration, Live/Preset modes, true/buffered bypass,* and silent switching, Astra Modulation Machine has your colors — now go forth, and paint your masterpiece.

Features

• Flagship, no-compromise stompbox offering the most authentic bucket-brigade and tube-driven tremolo effects ever captured in an effects pedal
• End-to-end emulation of iconic Japanese chorus/vibrato pedal
• Complete circuit capture of legendary '70s rackmount studio flanger/doubler
• Stem-to-stern model of tube-driven optical tremolo from classic '60s American amps
• Store and recall your favorite preset, silent switching, and true/buffered bypass*
• Free Phaser X90 and Dharma Trem '61 effects, downloadable at registration