Universal Audio UAFX Astra Modulation Machine Pedal

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Universal Audio UAFX

Universal Audio UAFX is Universal Audio’s pedal line, built around high-quality digital modelling derived from their studio hardware and software heritage. These pedals focus on capturing the behaviour and feel of classic amplifiers, effects, and recording chains, rather than offering endless tweakability. The emphasis is on accuracy, depth, and consistency, with sounds that feel finished straight out of the box.

UAFX pedals serve up carefully prepared, high-fidelity flavours that reward players who want studio-grade results on a pedalboard. They work best when treated as centrepiece ingredients rather than background seasoning — confident, refined, and designed to deliver the same result every time you step on them.

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Universal Audio UAFX

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Expression

Expression pedals allow real-time control over specific parameters on compatible guitar pedals, such as volume, delay time, modulation depth, or filter sweep. Used with an expression input, they let players shape effects dynamically with their foot, adding movement and performance control that cannot be achieved with fixed knob settings.

Flanger

A flanger is a type of guitar effects pedal used to create a swirling, whooshing sound by modulating the phase of an audio signal. It works by combining the original signal with a slightly delayed and modulated version of itself. As the two signals interact, they create peaks and troughs in the frequency spectrum, resulting in the characteristic “jet plane” or “swooshing” sound associated with flanging.

Key features of a flanger pedal include:

1. **Rate**: Controls the speed at which the delayed signal is modulated. Higher rates produce faster modulation, while lower rates create slower, more subtle effects.

2. **Depth**: Adjusts the intensity of the modulation effect. Higher depth settings result in more pronounced sweeps, while lower settings produce a gentler effect.

3. **Manual (or Range)**: Sets the center frequency of the modulation. This control allows you to focus the effect on specific frequency ranges, altering the tonal character of the flanging.

4. **Feedback (or Regeneration)**: Determines the amount of modulated signal that is fed back into the effect. Increasing feedback can create more pronounced peaks and troughs, resulting in a more intense effect.

Flanger pedals are commonly used in various music genres, including rock, metal, and psychedelic music, to add movement, depth, and texture to guitar tones. They can be used subtly to add a touch of modulation and dimension to a guitar sound, or more prominently to create dramatic swirling effects. Overall, flanger pedals offer guitarists a versatile tool for shaping and enhancing their tone, adding a dynamic and expressive element to their playing.

Guitar Pedals

Your pedal is like a signature dish for your sound — a flavour-packed creation that transforms the bland ingredients of your guitar into something unforgettable. Each one adds its own seasoning, texture, and heat, turning a simple meal into a feast of tone.

These tasty little boxes sit in a row, like plates on a buffet, letting you mix and match flavours as you play. With one tap of your foot, you can swap sweet for spicy, subtle for smoky, and serve up something completely new. From the comfort food of warm overdrive to the fiery kick of fuzz, from smooth jazz sauce to heavy-metal spice, pedals give players a full menu of options to express their taste.  And just like with food, once you’ve tried one dish, you’ll want to sample them all.

Collecting, trading, and discovering new flavours soon becomes part of the joy of being a tone-loving gourmet geek with a guitar.

MIDI

MIDI pedals use the Musical Instrument Digital Interface standard to communicate with other guitar pedals, effects units, and hardware. They allow control over presets, parameters, and switching across multiple devices from a single controller. MIDI integration makes it possible to build complex, synchronised pedal setups while keeping control simple and consistent.

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This is brand new, fresh in, and a UK warranty is included. New Gear always comes from trusted UK music retailers.

Phaser

A phaser is a type of guitar effects pedal that creates a swirling, sweeping sound by modulating the phase of the audio signal. It works by splitting the incoming signal into two paths, shifting the phase of one path, and then recombining them. This creates peaks and troughs in the frequency spectrum, resulting in a distinctive, “phasing” effect characterized by moving notches in the frequency response.

Here’s how a phaser pedal typically works and some common features:

1. **Rate**: The rate control adjusts the speed at which the phase-shifting effect oscillates. Increasing the rate produces faster modulation, creating a more pronounced swirling effect, while decreasing the rate slows down the modulation for a smoother, more subtle effect.

2. **Depth**: The depth control adjusts the intensity or depth of the phase-shifting effect. Higher depth settings result in more pronounced peaks and troughs in the frequency response, while lower settings produce a more subtle modulation.

3. **Feedback (or Regeneration)**: Some phaser pedals feature a feedback control that determines the amount of modulated signal fed back into the effect. Increasing the feedback creates more pronounced peaks and troughs in the frequency spectrum, resulting in a more intense and resonant phasing effect.

4. **Stages**: Phasers typically have multiple stages (usually four, six, or eight), each of which contributes to the overall phase-shifting effect. More stages generally result in a more complex and textured phasing sound.

5. **Sweep (or Manual)**: The sweep control adjusts the center frequency of the phase-shifting effect. This allows you to focus the phasing effect on specific frequency ranges, altering the tonal character of the modulation.

6. **Resonance (or Feedback)**: Some phaser pedals feature a resonance control that emphasizes the peaks and troughs in the frequency response, creating a more pronounced and resonant effect. This control can add richness and depth to the phasing sound.

Phaser pedals are commonly used in various music genres, including rock, funk, and psychedelic music, to add movement, depth, and texture to guitar tones. They can be used to create swirling, swirling effects on rhythm parts, add dynamics to lead lines, or create atmospheric textures for ambient music. Overall, phaser pedals offer guitarists a versatile tool for shaping their tone and adding expressive modulation effects to their playing.

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Tremolo

A tremolo pedal modulates the volume of your guitar signal up and down in a rhythmic pattern, creating a pulsing or wavering effect that can sound vintage and hypnotic or sharp and choppy depending on the settings. It’s one of the oldest effects in guitar history, famously used on classic amps from the 1950s and ’60s.

Most tremolo pedals let you control the speed, depth, and wave shape, allowing you to go from smooth, subtle swells to intense stuttering tones. It’s a simple but expressive effect that adds movement and character to your sound.

Vibrato

Vibrato refers to a guitar pedal effect that modulates pitch slightly up and down, creating movement and a sense of wobble in the sound. Unlike tremolo, which changes volume, vibrato affects pitch only, producing anything from subtle shimmer to pronounced, warbling textures. It is often used to add character, depth, and vintage-style modulation to guitar tones.