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Allen & Heath Quad Voice Harmoniser

On the record

Built-in effects
Built-in Plate Reverb and Chorus process the harmony stack without using additional FX slots.allen-heath.com · read 14 Nov 2026
Compatibility
The harmoniser is available in any of the four RackUltra FX units.allen-heath.com · read 14 Nov 2026
Global Key
The voices can be locked to the console’s Global Key.allen-heath.com · read 14 Nov 2026
Harmony voices
It provides up to four independent harmony voices that follow a specified musical key.allen-heath.com · read 14 Nov 2026
Humanisation
Pitch and Time Variation add randomized tuning and timing offsets to the generated voices.allen-heath.com · read 14 Nov 2026
Interval range
Each voice's interval can be set from one octave below to one octave above the source voice.support.allen-heath.com · read 14 Nov 2026
Key and scale
The unit lets users select a key and scale, and can follow the console’s Global key and scale.support.allen-heath.com · read 14 Nov 2026
Live sound use
The product description positions the harmoniser for live production.allen-heath.com · read 14 Nov 2026
Maker history
Allen & Heath says it began in 1969.allen-heath.com · read 14 Nov 2026
Purpose
Quad Voice Harmoniser builds multi-part vocal arrangements around a single live performer.allen-heath.com · read 14 Nov 2026
Technical support
Allen & Heath directs product technical questions to its Technical Support Centre or local distributor.allen-heath.com · read 14 Nov 2026
Voice controls
Each generated voice has independent Gain, Pan and Formant controls.allen-heath.com · read 14 Nov 2026
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.support.allen-heath.com · read 14 Nov 2026

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