Universal Audio UAFX Astra
Modulation Pedal
In stock at warehouse.
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For a limited time, buy any eligible UAFX Pedal from Modern Musician and instantly save! Unlock the secrets to legit vintage tone with Universal Audio and Modern Musician.
Built upon UA’s proven analog modeling expertise, UAFX Guitar Pedals give you sonic authenticity far beyond other stompboxes. From award-winning amp emulators to classic reverbs, delays, modulations, and compressors — experience unmatched guitar sounds like you’ve never heard before.
November 1 through December 31, 2025
Three of History's Most Mind-Expanding Modulators, Perfectly Captured in a Stompbox.
Engineered and developed by the acclaimed team at Universal Audio, the UAFX Astra Modulation Machine boasts powerful dual-processor architecture for the most sonically authentic classic Chorus, Vibrato, Flanger, and Tremolo effects ever available in a stompbox.
From spacey studio flanger tones of the 1970’s, to gritty bucket-brigade chorus and luscious opto tube tremolo, Astra Modulation Machine puts three iconic vintage effects at your feet, in a beautifully-crafted pedal that’s built to last decades.
Three Timeless Modulation Effects
Chorus Brigade: Classic ‘70s analog bucket brigade chorus with additional Vibrato mode.
Flanger/DBLR: Studio flanger/doubler tones modeling legendary rack effects units.
Trem 65: Perfectly-emulated opto tube tremolo derived from iconic blackface amps of the mid-1960’s.
Bonus Effects: Free Phaser X90 and Dharma Trem 61, downloadable at registration.
Astra Modulation Machine - Key Features
● Flagship modulation pedal with powerful dual-processor UAFX engine
● Three timeless modulation effects, with secondary modes and settings
● Simple Live/Preset modes for instant recall of your favorite sound
● Additional downloadable effects by the world-renowned UAD algorithm team
● True or buffered bypass,* silent switching
● Classic UA analog design and craftsmanship, built to last decades
Specifications
● Power requirements: Isolated 9VDC, center-negative, 400mA minimum**
● Inputs: 2 x ¼” TS (input 2 for stereo connections)
● Outputs: 2 x ¼” TS (output 2 for stereo connections)
● USB Type-C for updates via computer
*True/Buffered bypass available via UAFX Control software (coming Spring 2021)
**Power supply sold separately
For more information, click here to visit the manufacturers website.
