Three of the most psychedelic modulators in history, perfectly captured in a stompboxThe Universal Audio UAFX Astra Modulation Machine was designed and created by the renowned Universal Audio team. With its powerful dual-processor architecture, it delivers the most authentic-sounding classic chorus, vibrato, flanger, and tremolo effects ever available in a stompbox.

From the cosmic studio flanger sounds of the '70s, through the gritty bucket-brigade chorus, to the lush optical-tube tremolo – the Astra Modulation Machine places three iconic vintage effects at your feet. All in a beautifully and solidly crafted enclosure that will last for decades.

Three Timeless Modulation EffectsChorus Brigade: Classic '70s analog bucket-brigade chorus with an additional Vibrato mode.

Flanger/DBLR: Studio-grade flanger/doubler tones emulating legendary rack effects.

Trem 65: Perfect emulation of optical-tube tremolo from iconic '60s "blackface" amps.

Bonus Effects: Free Phaser X90 and Dharma Trem 61 available for download upon registration.

Key FeaturesFlagship modulation pedal with a powerful UAFX dual-processor engineThree timeless modulation effects with additional modes and settingsSimple Live/Preset modes for instant recall of favorite soundsAdditional downloadable effects created by the world-renowned UAD teamTrue bypass or buffered bypass*, silent switchingClassic analog design and UA craftsmanship, built to last for decadesSPECIFICATIONSPower Requirements: Isolated 9V DC, center-negative, minimum 400mA**Inputs: 2 x 1/4″ TS (input 2 for stereo connections)Outputs: 2 x 1/4″ TS (output 2 for stereo connections)USB Type C: For computer updatesAdd Classic Sound to Your SetupDon’t wait! Add the UAFX Astra Modulation Machine to your collection and elevate your tones with authentic vintage modulation effects.