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Universal Audio Astra Modulation Machine

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Universal Audio Astra Modulation Machine

$250.00 to $399.00 Price Tier: Standard

5.0 (1)

4 Critic Reviews

All time low price

Find out who is using Universal Audio Astra

1 community setup

3 wishlisted

10 saved

Page last updated Jun 20, 2026

Pricing and availability

We compare 600+ stores and found this item at 8 stores. Prices updated June 20, 2026.

Store

Reviews

Price

3.5 (12)

$375.22

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4.0 (2)

$399.00

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4.2 (18)

$399.00 $375.22 $23.78 · All time low

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5.0 (5)

$250.00 55 available New

$195.00 15 available Used

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$399.00

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$399.00 $375.22 $23.78 · All time low

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4.5 (18)

$299.00

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£274.00

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Average Price: $333

Standard/Professional

$150

$601+

Price Tier

In the Multi Effects Pedals category, Universal Audio Astra Modulation Machine is priced in the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

Budget

Standard

High-end

Price History

Based on price data from 6 merchants for "Universal Audio Astra Modulation Machine". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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The Universal Audio Astra Modulation Machine is more than a pedal; it's a portal to a new dimension of sound. This flagship stompbox offers a stellar collection of three legendary effects – Chorus Brigade, Flanger/DBLR, and Trem 65 - giving you the power to sculpt your soundscapes in mono, dual mono, or stereo modes.

The Chorus Brigade effect meticulously recreates the iconic analog chorus and vibrato unit from the 1970s, allowing you to dial in everything from a gentle shimmer to a wild sway. The Flanger/DBLR effect captures the essence of analog sound with its colorful, bucket-brigade circuit, offering a spectrum of effects from subtle thickening to an otherworldly whoosh. Lastly, the Trem 65 effect faithfully reproduces the warm, balanced pulsations of the much-loved tremolo circuit found in '60s American amplifiers.

Constructed to last and designed for ease of use, the Astra Modulation Machine also features preset capabilities that let you save and recall your favorite settings. Whether you're looking to recreate the sounds that shaped rock history or pioneer new sonic territories, this pedal is your ticket to tonal bliss.

Key Features:

3 legendary modulation effects: Chorus Brigade, Flanger/DBLR, and Trem 65
Operable in mono, dual mono, and stereo modes
Preset capabilities for saving and recalling settings
Rugged construction and intuitive controls
True bypass and optional buffered bypass modes
UAFX Control app expands functionality
FREE Phaser X90 and Dharma Trem 61 bonus effects at registration
Unmatched sonic authenticity
Configurable footswitch operation

Product specs

Pedal Type	Chorus, Flanger, Tremolo
Analog/Digital	Digital
Effects	Chrous Brigade, Flanger/Doubler, Trem 65
Inputs	2 x 1/4" TS (L/mono,R)
Outputs	2 x 1/4" TS (L/mono,R)
USB	USB-C (updates)
True Bypass	Yes, Switchable to Buffered (via software)
Features	Dual-processor UAFX Engine, Recall Stored Settings
Software	UAFX Control app (Android/iOS 11 or later)
Power Source	9V DC 400mA power supply (sold separately)
Height	2.56"
Width	3.62"
Depth	5.55"
Weight	1.24 lbs.

FAQs

What types of modulation effects does the Universal Audio Astra Modulation Machine offer?: The Universal Audio Astra Modulation Machine provides three modulation effects: Chorus Brigade, Flanger/Doubler, and Trem 65, giving you a range of classic modulation sounds.
Is the Universal Audio Astra Modulation Machine compatible with stereo setups?: Yes, the Astra Modulation Machine features stereo input and output options, allowing it to be seamlessly integrated into stereo setups.
Can I update the firmware on the Universal Audio Astra Modulation Machine?: Yes, you can update the firmware using the USB-C connection, ensuring your pedal has the latest features and improvements.
Does the Universal Audio Astra Modulation Machine support true bypass?: The Astra Modulation Machine supports true bypass and can be switched to buffered bypass via software for optimal signal integrity.
What power supply is required for the Universal Audio Astra Modulation Machine?: The Astra Modulation Machine requires a 9V DC 400mA power supply, which is sold separately.

Videos

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Universal Audio

UAFX Astra Modulation Machine

Universal Audio

Exploring The Modulation Sounds Of The Universal Audio UAFX Astra Modulation Machine Pedal

Vintage King

Universal Audio Astra Modulation Machine Deep Dive

Sweetwater

UAFX Astra Modulation Machine - Sound Demo (no talking)

Guitar Bonedo

15 Awesome Modulation Riffs | UAFX Astra Modulation Machine (Pedal Demo)

Let's Play All

Sound Examples – UAFX Astra Modulation Machine

Universal Audio

UAFX Astra Modulation Machine - Chorus Brigade Tutorial

Universal Audio

UAFX Astra Modulation Machine - Flanger/Doubler Tutorial

Universal Audio

Reviews

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PROS

Top shelf effects with less noise than old units
Built like a tank, high-quality design
Offers a variety of modulation effects
Flanger/Doubler effect creates broad, rich sounds
Pristine audio quality, high fidelity effects
Easy to dial in good sounds, even for beginners
LEDs indicate inactive controls, simplifying use
Five different algorithms with additional effects upon registration
Effects sound indistinguishable from analog counterparts
Solid build quality

CONS

Lacks MIDI control
Only one memory slot for presets
Some effects, like the clean Phaser, distort at higher levels
Considered more a studio processor than a pedal by some
Absence of inscriptions makes navigation unclear
Bluetooth connection reported as unstable
Limited pre/post processing capabilities for effect routing

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Universal Audio Astra Modulation Machine.

Features and functionality

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The Astra lacks MIDI and preset capabilities, which may be a limitation for users accustomed to modern pedalboards with these features.
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The Astra's knobs can be confusing, as they perform different functions depending on the modulation type, with some knobs inactive in certain modes.
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Comparisons

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Astra's Flanger/Doubler is praised as the best available, rivaling vintage units like the original MXR rack unit, which is hard to replace due to obsolete components.
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Astra's range of tremolo settings offers versatility, allowing it to replace multiple pedals like the Shallow Water and Monument on some users' boards.
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The Astra's CE1 and harmonic tremolo are highly regarded, compared favorably to classic sounds like those of the CE-2 and DC-2.
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Use cases and applications

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Ideal for classic rock and prog musicians seeking authentic vintage modulation sounds without needing multiple pedals on a board.
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Omar Rodriguez Lopez uses the Astra primarily for its tremolo effects, highlighting its suitability for artists seeking quality tremolo sounds.
Source

User experience

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Some owners find the pedal's simplicity appealing, as it avoids option paralysis common with multi-function effects pedals.
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Astra is favored for its ability to consolidate multiple modulation effects into one unit, simplifying pedalboard setups for users.
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Owners note that the Astra may become bricked, with reports of poor support for resolving such issues.
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Software and compatibility

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There is anticipation for an app release that could potentially enhance the pedal's features, though details are still pending.
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Users find the app control for the Astra cumbersome, as frequent app use is needed to manage the pedal's various functions.
Source

Build quality

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Owners praise Astra's rock-solid and durable build, emphasizing its reliability on pedalboards over time.
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Value and pricing

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Some users suggest searching for used UA pedals in the $250 range for better affordability, acknowledging their higher price point.
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Critic Reviews

Universal Audio Modulation Machine review | Guitar World

guitarworld.com

The Universal Audio Astra Modulation Machine delivers an impressive range of modulation effects with studio-quality sound, making it a worthy addition to any pedalboard. Its wide variety of vintage-inspired tones and highly adjustable parameters are standout features. However, the steep price tag may deter budget-conscious musicians. Overall, it's a premium option for those seeking authentic modulation without compromise.

positive

Full Review

Universal Audio UAFX Golden Reverberator, Starlight Echo Station and Astra Modulation Machine review | MusicRadar

musicradar.com

Universal Audio's Astra Modulation Machine dazzles with its vintage-inspired sounds and sleek design, delivering a plethora of modulation effects that will thrill discerning players. However, the lack of MIDI connectivity and a second preset may limit its usability for some. While it excels in quality and aesthetic appeal, the absence of these features at a premium price could frustrate potential buyers. Despite these drawbacks, the Astra remains a standout option for those seeking authentic modulation tones, making it a worthy addition to any pedalboard.

positive

Full Review

The Big Review: Will Universal Audio’s entry into the guitar pedal market send boutique brands scurrying for cover?

guitar.com

The Universal Audio Astra Modulation Machine delivers impressive sound quality with a range of modulation effects that can satisfy even discerning musicians. Its rich stereo chorus and minimal noise make it a standout in modulation. However, the pedal's navigation can be confusing, and the lack of MIDI control or preset storage options may deter some users. Additionally, the price point of £355 might feel steep given its production quality, made in Malaysia. Despite its shortcomings, the Astra shines in tonal capabilities, making it a solid choice for those eager to explore premium modulation sounds while accepting some operational quirks.

neutral

Full Review

Review: Universal Audio UAFX Astra Modulation Machine

mixdownmag.com.au

The Universal Audio Astra Modulation Machine is a standout in the pedal market, merging classic analog tones with modern DSP technology. Its lush, detailed modulation options pay homage to iconic devices while offering incredible flexibility and sound quality. The pedal's true bypass circuitry and thoughtful routing options elevate its performance, making it a must-have for both studio and stage. However, while the pedal excels in quality and design, its relatively high price point may deter some budget-conscious musicians. Overall, the Astra is a masterful blend of nostalgia and innovation, perfect for those ready to invest in premium modulation.

positive

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