With Astra Modulation Machine, Universal Audio's engineers traveled down a rabbit hole of analog modulation effects, emerging with the most authentic sounding bucket-brigade chorus/vibrato, studio flanger/doubler, and tube-driven tremolo ever put into a stompbox. Built upon powerful UAFX dual-engine processing for unmatched levels of quirky analog realism, Astra delivers richly addictive vintage modulation sounds built to inspire for decades to come.

Astra gives users the most complete circuit emulation of the legendary gray bucket-brigade chorus stompbox. Harnessing a perfectly-emulated circuit — including its preamp section for authentically rich, saturated sounds — users can paint their tones with the thick, luxuriant chorus and wavy vibrato of a famed ‘70s modulation effect

Classic rackmount studio flanger/doubler is famous for stunning whoosh effects, organic thickening, and a parade of wild sounds that go beyond typical flanger boxes. Astra's Flanger/Dblr effect is the only end-to-end circuit emulation of this ultra-rare unit, capturing all of its original qualities and putting dense, complex flanging/doubling right at your feet.

Trem 65 Authentic Tube Amp "Shake" is a faithful emulation of the optical tube-driven tremolo of '60s American amplifiers. From shimmering ripples to choppy mayhem, UA captured every detail, down to the complex interactions between the light source photoresistor and 12AT7 driver tube. Plus, users can explore further and create their own trem textures with variable sine and square wave settings.

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, giving users a full stereo spread of complex, jaw-dropping textures.

Using its rear panel USB-to-MIDI connection, Astra Modulation Machine fits right into your programmable MIDI rig, receiving preset changes, BPM clock sync, and more. It’s the fast ticket to live performance heaven.

The UAFX Control app is key to deep tone shaping — letting you customize, save, and manage your effects. Plug right in with a direct "hardwired" USB connection to your smart phone, or enjoy rock-solid control over Bluetooth.

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    Silent switching, preset footswitch mode to store and recall your favorite setting
  
• Bring your live shows to life with USB MIDI support, providing 128 recallable presets, MIDI BPM clock sync, and real-time expression
  
• Control your pedals via the UAFX app over a wired USB connection (iOS or Android), offering another robust option for managing settings
  
• Ground-up redesign of the UAFX app, with Bluetooth control for improved reliability
  
• Switch between more presets on UAFX Amp Pedals using powerful new performance modes like Live, Tour (A/Bypass-B/Bypass) and A/B-C/D