Universal Audio UAFX Astra Modulation Machine – Premium Classic Modulation in a Modern Pedal
The Universal Audio UAFX Astra Modulation Machine brings studio-grade modulation effects to your pedalboard, delivering lush choruses, rich flangers, expressive vibrato, and warm tremolo tones. Built for guitarists, bassists, and producers who want legendary modulation with modern flexibility, it combines UA’s renowned digital modeling with analog-style craftsmanship — available at Soundium.
Key Features
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Three iconic modulation engines: Access classic chorus, flanger, vibrato, and tremolo tones with stunning realism.
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Dual stereo processing: Run immersive stereo effects with pristine separation and smooth transitions.
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Preset storage: Instantly save and recall your favorite sounds for consistent tones on stage or in the studio.
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USB-upgradable algorithms: Expand your pedal with additional modulation models from Universal Audio.
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Silent switching and bypass options: Choose between true or buffered bypass while keeping your signal noise-free.
Customer Benefits
With the Astra Modulation Machine, you get timeless modulation effects in stunning detail, supported by a flexible stereo architecture and expandable sound library. Whether building ambient textures or enhancing your core tone, it improves every stage and studio workflow — backed by the reliability you expect from Soundium.
Quick Specs
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Dimensions: 92 mm × 141 mm × 65 mm
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Weight: 560 g
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Inputs: 2 × 1/4″ TS (L/Mono, R)
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Outputs: 2 × 1/4″ TS (L/Mono, R)
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Power: 9 V DC, centre-negative, 400 mA minimum (power supply sold separately)
What’s in the Box
- UAFX Astra Modulation Machine pedal
- User manual and registration information
Use Cases / Ideal For
Ideal for guitarists, bassists, ambient creators, synth players, and studio producers seeking lush, authentic modulation tones.
Compatibility
Compatible with standard 9 V pedalboard power supplies and supports firmware updates via USB.
Pros & Cons
✅ Pros:
- Authentic vintage modulation models
- Stereo I/O with analog dry-through
- Expandable via downloadable algorithms
⚠️ Cons:
- Power supply not included
- More complex than basic modulation pedals
The Universal Audio UAFX Astra Modulation Machine delivers studio-grade vintage modulation with modern control and exceptional sound, making it a powerful addition to any pedalboard — available at Soundium.
