The Lexicon Vortex sets new standards for sound processing by delivering effects that respond musically to your playing. Performance capabilities such as Tap Tempo, Audio Morphing and Dynamic Envelope Control offer extensive room for individual expression and experimentation. Each effect uses a combination of modules and a shared set of 16 general parameters to control them all. This means that a single effect can yield radically different sounds depending on parameter assignment. The preset names (for example ATMOSPHERE or DEJA VU) hint at the breadth of possibilities offered.
If you are looking for something inspiring and capable of producing sounds quite unlike the usual options, the Lexicon Vortex provides a highly creative tool at a comparatively accessible price (noted in a 1994 review). The effects are not passive; they are deliberately designed to respond dynamically to your playing via an envelope-follower. For example, in certain patches louder signals may increase vibrato rate; in others they may reduce feedback. The envelope sensitivity is user-adjustable, allowing you to determine how much influence your playing dynamics have on the effect.
Despite the advanced features, the Vortex is designed for ease of use. Many of the more sophisticated operations require only a single button press. With 32 presets ready out of the box, you have immediate access to sound-design possibilities, and each preset provides a solid springboard for further exploration and customisation.
Each of the 32 presets f the Lexicon Vortex has its own sonic character. Some are based on traditional effects (rotary speaker, auto-pan, chorus) and others are more experimental and difficult to describe, such as BLEEN A/B or FRACTAL B. For example: MOSAIC A is a dual-modulator with the left input chased by quarter-note echoes and the right input chased by quarter-note-triplet echoes; MOSAIC B produces a deep, wide sound via modulated-sine/echo effect with tight echoes, and the Audio Morphing facility lets you transform A into B or vice-versa.
The Lexicon Vortex’s echo setup is straightforward: you set the delay subdivisions via the front-panel Parameter and Value knobs (e.g. Echo 1 = 8th-note, Echo 2 = 16th-note), and the Tap Tempo button or footswitch sets the base tempo. The two echo lines always synchronise to that tempo, enabling complex polyrhythms across the stereo field. Add the envelope follower, expression pedal control and morphing between entire effect algorithms and you have a genuinely creative tool rather than just another effect box.
It is a true stereo processor: left and right inputs are processed separately, allowing stereo image creation or completely different sound sources on each channel (such as vocals on one, drums on the other). It remains mono-compatible. The unit also includes an electrically isolated analogue switch for remote amp channel selection (via a standard guitar cable to the A/B switching input on your amp) so you can coordinate your A/B button with amp-channel switching.
As supplied, the Lexicon Vortex includes a dual footswitch for Bypass/Step or Tap/A-B switching. A second dual footswitch can add further remote control. An expression pedal can be assigned to control any parameter including the morphing transition, enabling dynamic real-time control over the transition path.
The Lexicon Vortex remains a distinctive piece of hardware. It is not simply a multi-effect unit but rather a performance engine where tempo, dynamics, stereo space and morphing intersect. It invites creativity and rewards patience. While it may not offer the deep routing or MIDI flexibility of later units, for users seeking inspiration, evolving textures and live performance control, it retains a compelling charm.
Features
- Tempo-synchronised dual echo lines with independent subdivisions.
- Audio Morphing between any two effect algorithms (complete parametric and algorithmic restructure, not just cross-fade).
- Envelope-follower dynamic control affecting parameters such as vibrato rate or feedback amount.
- 32 factory presets (16 pairs A/B) and 32 user registrations for storing edited effects.
- Stereo processing with separate left/right signal paths; mono-compatible.
- Tap Tempo and expression-pedal control of time, morph or other parameters.
- Analogue remote control jack for amp channel switching.