Quick answer: The Astra Modulation Pedal is an authentic Universal Audio UAFX product. Priced at $399.00, sold brand-new by Victory Musical Instruments, a veteran-owned authorized UA dealer in Miami, FL. Questions? Call 844-687-4208.

Three classic modulation effects in one flagship stereo pedal. The Universal Audio UAFX Astra Modulation Machine delivers Chorus Brigade (Boss CE-1 bucket-brigade chorus), Flanger DBLR (classic studio flanger), and Trem 65 (Fender-style tube tremolo) — plus optional Dharma 61 harmonic tremolo and Phaser X90 vintage phasing add-ons.

At a Glance

Overview

Astra is UA's flagship modulation pedal, bringing UAD's renowned modulation algorithms to the pedalboard. The three primary engines cover the most-used modulation types in studio history: Chorus Brigade (the original CE-1 bucket-brigade chorus sound), Flanger DBLR (the studio flanger sound that defined countless '70s and '80s records), and Trem 65 (the classic Fender amp optical tremolo). The UAFX Control app unlocks two additional engines: Dharma 61 (dynamically controllable harmonic tremolo) and Phaser X90 (classic vintage phaser).

Key Features

• Three Primary Modulation Engines — Chorus Brigade, Flanger DBLR, Trem 65.
• Two Bonus Engines — Dharma 61 (harmonic tremolo) and Phaser X90 (vintage phaser), via UAFX Control.
• Three Variations Per Engine — Multiple sound flavors within each modulation type.
• Stereo Operation — Two-channel inputs and outputs for true stereo modulation.
• Tap Tempo — Enable via UAFX Control app.
• Speed, Depth, Intensity, Shade, Shape, Mode — Six knobs for deep tonal shaping.

UAFX 2.0 Features

• Four On-Pedal Presets — Store and recall four complete pedal states via footswitches.
• MIDI-over-USB — Realtime MIDI control of parameters and preset changes.
• Improved Bluetooth + USB-to-Mobile — Wireless or hardwired UAFX Control app connection.
• UAFX Control App — Audition variants, customize footswitches, archive presets.

Specifications

• Format — Dual-footswitch UAFX pedal, ~2x standard stompbox size.
• Power — Isolated 9V DC, center-negative, 400 mA minimum (sold separately).
• Inputs — 2 x 1/4" TS (stereo).
• Outputs — 2 x 1/4" TS (stereo).
• USB — USB Type-C for firmware updates and MIDI-over-USB.
• Wireless — Bluetooth for UAFX Control app.
• Dimensions — 2.56" x 3.62" x 5.55" (65 x 92 x 141 mm).

What's in the Box

• UAFX Astra Modulation Machine pedal
• Quick start guide
• Note: 9V isolated power supply (minimum 400 mA) sold separately

Frequently Asked Questions

What power supply does this UAFX pedal need?

It runs on a standard 9V DC center-negative power supply (larger UAFX models need a higher-current supply). Check the box contents listed above to see whether a power supply is included with this model.

Is it true bypass, and does it work in stereo?

UAFX pedals offer switchable true or buffered bypass via the free UAFX Control app, and stereo-capable models accept and output stereo through their TRS or dual jacks.

Do I need the UAFX Control app to use it?

No, the pedal works standalone right out of the box. The free UAFX Control app (mobile and desktop) is optional and unlocks extra presets, alternate models, and deeper settings.

What's included in the box?

Your purchase includes: UAFX Astra Modulation Machine pedal, Quick start guide.

Is the Astra Modulation Pedal a genuine Universal Audio product?

Yes. Victory Musical Instruments is a veteran-owned, authorized Universal Audio dealer based in Miami, FL. Every unit is brand-new, factory-sealed, and covered by the full UA manufacturer warranty.

Can I get help choosing or setting it up?

Absolutely. You'll talk to real people, not a call center. Call us at 844-687-4208 and we'll help you spec the right gear and get it running.

Why Buy from Victory Musical Instruments

Victory Musical Instruments — veteran-owned, Miami-based, authorized UA dealer. We trust the gear we sell and back it with real support, not a call center. Active duty, veterans, reservists, and eligible family save through our ID.me military discount program.