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UA-ASTRA

Universal Audio UAFX Astra Modulation Machine Mod Effects Pedal

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Product Information

The Pinnacle of Classic Chorus, Flanging/Doubling, and Tube Tremolo Effects.

Astra Modulation Machine captures the most authentic bucket-brigade chorus/vibrato, studio flanger/doubler, and tube-driven tremolo ever put into a stompbox. Powered by Universal Audio’s UAFX dual-engine processing, Astra provides the lush depth and warm movement of iconic analog modulation hardware — with the flexibility and control of a modern pedal.

Chorus Brigade — Iconic Japanese Modulation
Astra features a full circuit emulation of the legendary gray bucket-brigade chorus pedal, including the original preamp for rich harmonic saturation. Enjoy beautifully thick chorus textures and gentle wavy vibrato straight from the golden era of '70s modulation.

Flanger/Doubler — A Rackmount Studio Classic
Based on a rare '70s rack flanger/doubler unit used in top recording studios worldwide, Astra recreates its sweeping flanger effects, dimensional doubling, and surreal motion — all meticulously modeled for authentic response and tone.

Trem 65 — Authentic Tube Amp “Shake”
Astra delivers a faithful recreation of the optical tube-driven tremolo found in classic American combo amps. From dreamy movement to hard, choppy pulses, every nuance of the 12AT7-driven circuit and photocell interaction is retained — including selectable sinusoidal or square wave behavior.

Dual-Engine Stereo Power
With two independent stereo processing engines, Astra can run modulation effects in true stereo for immersive, three-dimensional modulation textures that feel alive under your fingers.

MIDI & App Control
Connect Astra to your MIDI setup via USB for preset recall, clock sync, and real-time control. Use the UAFX Control app (USB or Bluetooth) to adjust pedal behavior, customize footswitch modes, and manage presets with ease.

Features

  • Flagship UAFX modulation pedal with dual-engine stereo processing
  • Authentic bucket-brigade chorus/vibrato circuit emulation
  • Complete model of rare '70s studio flanger/doubler hardware
  • Tube-driven optical tremolo recreation from classic American amplifiers
  • Silent switching with preset footswitch mode for instant recall
  • UAFX Control mobile app for bypass mode selection, preset management, and Tap Tempo control
  • Includes free Phaser X90 and Dharma Trem 61 effects upon registration
  • UAFX 2.0 firmware adds MIDI control and enhanced Bluetooth functionality

Power

  • Power Requirements: Isolated 9VDC, center-negative, 400mA minimum (sold separately)

Inputs

  • Inputs: 2 x ¼” TS (right input supports stereo connections)

Outputs

  • Outputs: 2 x ¼” TS (right output supports stereo connections)

Connectivity

  • USB: USB Type-C for firmware updates and USB MIDI control

Dimensions

  • Height: 2.56” (6.5 cm)
  • Width: 3.62” (9.2 cm)
  • Depth: 5.55” (14.1 cm)
  • Weight: 1.24 lbs (0.567 kg)

Warranty

1 Year Warranty
Warranty & Support 

All products are backed by the original manufacturer’s warranty, giving you confidence that your purchase is protected. If you ever need to make a claim, the process is simple — just email us at warranty@belfieldmusic.com.au with the following info:

Name:
Invoice/Order Number:
Item:
Fault Description:
Serial Number:
Email:
Contact Number:
Address:
 
Our team will guide you through the next steps and arrange a repair, replacement, or refund where applicable. We aim to make the process quick and stress-free, so you can get back to enjoying your gear as soon as possible. 

 

Shipping Policy

All orders over $150 will be automatically eligible for FREE Shipping Australia Wide, if you order is under $150 there will be a flat rate of $10.

Belfield Music is well known for its top online customer service. We treat all online customers with the same excellent service we give to our in store customer. We will ensure that you receive all the support you need while your goods are in transit and ensure the goods arrive promptly. All of our shipments have tracking numbers available and we cover every single unit by our own shipping insurance.     

Online orders are normally processed within 1-3 business days. Once processed, your order should take between 1-8 business days to arrive depending on your location. Please note that your order may take up to 10 business days to arrive from the day you place your order. 

If it transpires that the product is out of stock due to a stock discrepancy and/or there will be a delay in shipment, we will contact you within 2 business days of placing your order and give you the option of waiting or cancelling your order. The products we advertise online should show if they are in stock or not. We do our best to keep the website stock count up to date, but there may be an occasional error.

If you wish to utilize an Express Delivery Service to receive your item, please contact us for a shipping quote before you place your order at admin@belfieldmusic.com.au or by using the Chat icon on the bottom right of the page.           

Deliver is made during the hours from 8:00am till 5:30pm Monday to Friday. As such, please ensure you nominate an address which is capable of receiving goods during 8am and 5.30pm.  Given the restrictions on PO Box deliveries we cannot deliver larger sized items to a PO Box.

If for any reason our selected carriers don't service your area we will contact you before processing your order if this applys to you.

 

Returns Policy

If you wish to return an item which is not damaged or faulty in any way and you have simply changed your mind or made the wrong decision, you must let us know within 7 days of receiving the item.  We will not agree to refund an item because you simply changed your mind or made the wrong decision if we have not been advised of your intention within 7 days of receiving your item. Once we have provided a return authority, it is the buyer’s responsibility to return the item, at their own costs within 30 days from original purchase. If the item is returned with any damage or alteration to its original packaging, we will refund the item subject to applying a minimum 15% restocking fee.  We will not refund the costs of the initial shipping charges.

It is in Belfield Music best interests to keep our customers happy with their purchases. If you are not happy with your purchase, please talk to us first. We will always attempt to resolve any problems you may have as best we can. To contact us please email us at admin@belfieldmusic.com.au or by using the Chat icon on the bottom right of the page.

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