Universal Audio Astra Modulation Machine review

A feature-stacked modulation stompbox that's out of this world

Universal Audio pedals
(Image: © Universal Audio)

Guitar World Verdict

Look no further for authentic recreations of vintage modulation effects.


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    Superb, studio-quality sounds.

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    Wide range of modulation.

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    Highly tweakable.


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Having made its name in studio equipment, with authentic plug-in emulations that are powered by DSP and housed in hardware, Universal Audio's is staking a claim for our pedalboards with a trio of high-end stompboxes.

The range comprises the Golden Reverberator reverb pedal, the Starlight Echo Station delay pedal, and the Astra Modulation Machine that we have here. Each arrives with various mono and stereo options and a choice of three effects with toggle-switched variations.

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Trevor Curwen

Trevor Curwen has played guitar for several decades – he's also mimed it on the UK's Top of the Pops. Much of his working life, though, has been spent behind the mixing desk, during which time he has built up a solid collection of the guitars, amps and pedals needed to cover just about any studio session. He writes pedal reviews for Guitarist and has contributed to Total Guitar, MusicRadar and Future Music among others.