Universal Audio Astra Modulation Machine

Universal Audio 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.

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

Chorus Brigade: Iconic Japanese Modulation
Upon its release in 1976, this legendary gray bucket-brigade stompbox changed the sound of music with its thick, luxuriant chorus and wavy vibrato. Astra's Brigade Chorus mode gives you the most complete circuit emulation of this landmark unit — including its preamp section for authentically thick, saturated sounds — letting you paint with subtle ripples of analog texture and tone, adding chewiness, shimmer, and motion to everything you play.

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.

Trem 65: Authentic Tube Amp "Shake"
Few things compare to the optical tube-driven tremolo of '60s American amplifiers. Deep, undulating, and the very essence of vibe, Trem 65 is a faithful emulation of this classic circuit. From shimmering ripples to choppy mayhem, every dynamic detail is captured in UA style, down to the complex interactions between the light source photoresistor and 12AT7 driver tube. Plus, you can explore further and create your own trem textures with variable sine and square wave settings.

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.

Shipping Policy

Flipside Music ships items within 2 business days of purchase. If an order is placed after 5pm, the next day would be considered the first business day.  We do not ship on the weekend. Fedex or USPS will be used to ship your purchase, if you have a preference for another shipping provider, please contact Ike or Dylan and we will work with you and the company you choose. Items ordered after 12pm on Fridays MST will be shipped out on the following Monday (shipping services don't pickup on weekends). 

Purchase confirmation emails will be sent after transaction is complete. Sometime these email can end up in a spam folder, depending on email provider and any applied filters. So check there if you don't see a confirmation email within 15 minutes. 

Flipside Music does ship used gear Internationally. Please contact us if you have questions regarding a specific item. we can provide a shipping estimate. International orders may be subject to destination countries sales, VAT or import tax. Please contact your countries duty center, prior to purchase for more information regarding these fees. Flipside music will not reduce listed price to avoid said duties.

Most new items will not ship internationally, this includes Yamaha, Fender, Charvel, Gretsch, Strymon, ect. 

If you have any questions regarding shipping please call the shop at 720-519-1996 or email us at info@flipside-music.com

Return Policy

New Items:

We honor a 14 day return window on all new items.

If you feel the need to return an item, it must be in the sellable condition, no paint chips, scratches or broken parts. Sellable Condition means that the product(s) is in exactly the same condition as it was when you received it. The item must have all the original packaging, included accessories owner’s manuals and blank warranty card, no sign of wear or abuse.

Used and Vintage Gear:

We honor a 3 day return window on all used and vintage items.

All our used gear is tested for functionality prior to being available for purchase and therefore only carries a 3 day approval period. If you would like to make a return just let us know within the 3 day window.

Damaged or Defective Items:

We visually inspect all items before shipment. If you believe you have received a damaged or defective product, please contact us immediately so we can work through the issue. Guitars, basses, and other equipment returned to us with pick marks, "buckle-rash", or any other damage or evidence of use may be subject to a 20% restocking fee, repair charge or disqualification of return. All items must be returned to us in the same condition they were when shipped to qualify. We reserve the right to refuse any return if we determine the item has been misused, modified or damaged by the purchaser. If the item turns out not to be defective upon inspection, we will have to deduct the cost of shipping from your return credit.

Shipping Charges incurred through the return of an item:

You will be responsible for the shipping charge for the return of your item, and if your item qualifies for Free shipping on its way to you, this shipping charge will also be deducted from your refund. If your item is determined to be defective, we will pay the shipping charge, equivalent to ground service.