Akai EWI 4000S

A Quick Tour of UniQuest For EWI 4000s
18 of 44 UniQuest for EWI 4000s
Oscillator Pitch & Volume Envelope Parameters
SWEEP TIME
• Range is 0 to 100%. Unlike a keyboard controlled synthesizer, the EWI 4000s
does not use a standard envelope generator (ADSR) to control the Oscillator
Pitch. Instead, your breath pressure can act as a real-time trigger of a Sweep
whose time to complete is set by this control:
SWEEP DEPTH
• Range is -50% to +50%. Unlike a keyboard controlled synthesizer, the EWI
4000s does not use a standard envelope generator (ADSR) to control the Oscilla-
tor Pitch. Instead, your breath pressure can act as a real-time trigger of a Sweep
whose pitch depth is set by this control. As shown above, negative values cause
the sweep to begin at a lower pitch than original, while positive values cause the
sweep to begin at a higher pitch than original.
BREATH ATTAIN
• Range is 0 to 100%. As well as triggering the sweep, your breath pressure can act
as a real-time controller of the sweep parameters. This parameter modulates the
sweep time as follows:
BREATH DEPTH
• Range is 0 to 100%. As shown above, this parameter modulates the amount of
pitch modulation according to the breath strength: At 100% the Breath Depth is
the full amount set by the Sweep Depth control.