Allen & Heath Quad Voice Harmoniser

Spec sheet

Purpose

Quad Voice Harmoniser builds multi-part vocal arrangements around a single live performer.Read 14 Nov 2026 · allen-heath.com

Built-in effects

Built-in Plate Reverb and Chorus process the harmony stack without using additional FX slots.Read 14 Nov 2026 · allen-heath.com

Compatibility

The harmoniser is available in any of the four RackUltra FX units.Read 14 Nov 2026 · allen-heath.com

Global Key

The voices can be locked to the console’s Global Key.Read 14 Nov 2026 · allen-heath.com

Harmony voices

It provides up to four independent harmony voices that follow a specified musical key.Read 14 Nov 2026 · allen-heath.com

Humanisation

Pitch and Time Variation add randomized tuning and timing offsets to the generated voices.Read 14 Nov 2026 · allen-heath.com

Interval range

Each voice's interval can be set from one octave below to one octave above the source voice.Read 14 Nov 2026 · support.allen-heath.com

Key and scale

The unit lets users select a key and scale, and can follow the console’s Global key and scale.Read 14 Nov 2026 · support.allen-heath.com

Live sound use

The product description positions the harmoniser for live production.Read 14 Nov 2026 · allen-heath.com

Maker history

Allen & Heath says it began in 1969.Read 14 Nov 2026 · allen-heath.com

Technical support

Allen & Heath directs product technical questions to its Technical Support Centre or local distributor.Read 14 Nov 2026 · allen-heath.com

Voice controls

Each generated voice has independent Gain, Pan and Formant controls.Read 14 Nov 2026 · allen-heath.com

Voice gain and pan

Each voice's gain can be attenuated from 0 dB to -40 dB and its pan position set left or right.Read 14 Nov 2026 · support.allen-heath.com

Where Specifiction places it

• AI Harmony Generators#6 of 205.9