Specifications

PARAMETER REFERENCE MANUAL74
EFFECT PARAMETERS
Character Section
The Character effect section consists of either a Rotary Speaker, a Vowel Filter or a
Comb Filter
¦ Type
Type chooses the desired effect algorithm.
Rotary Speaker
The Rotary Speaker chorus type is an extremely faithful recreation of the sound made by the legendary
Leslie speaker - best known for the wonderful effect it has on the sound of the Hammond organ. The Leslie
speaker modulates the sound by rotating both the bass speaker drum and the tweeter horn inside a cabinet
- but, crucially, they are rotated at different speeds from each other. The result is a complex example of the
Doppler effect, and the way it affects the sound is magical - it’s basically like a vibrato, tremolo and chorus
in one. The Leslie speaker also works surprisingly well with both electric and acoustic pianos - the result is a
very distinctive sound, instantly recognisable from many iconic recordings.
Tip: Although the Rotary Speaker effect includes a speaker cabinet, try using the “Speaker Cabinet” in the
Characters section of the Virus at the same time for an even more distinctive sound.
¦ Speed
Use the Rate parameter to switch between Slow and Fast rotation. You will notice that the change in rotation
speed is not immediate - the main reason for this is that the bass rotor takes considerably longer to change
its speed than the tweeter horns.
Tip: If you would prefer to have continuous control over the Rate parameter, or to set values in between the
Slow and Fast rates, you can still target Chorus Rate in the mod matrix.
¦ Mic Angle
Use the Angle parameter to adjust the angle of the microphone relative to the speakers. Full stereo width is
achieved at 180° and -180°. If you want the effect to be mono, set Angle to 0° (middle position).
¦ Low/HighBalance
Use the High/Low Balance parameter to adjust the balance between the outputs of the bass rotor and the
tweeter horn. Lower values result in a darker and duller sound, and higher values will result in a brighter, thin-
ner sound. For a faithful emulation of the classic Leslie sound, leave the parameter set to the middle posi-
tion.
¦ X-Over
Increase the value of the X-Over parameter to shield the lower frequencies of the input signal from the effect
of the chorus.
Air Chorus
The Air Chorus is a subtle kind of chorus, as it doesn’t mix the direct sound to the processed signal; instead,
it modulates the pitch of the left and right side of the signal independently from each other. The resulting
chorus sound happens in the air between both speakers, where both signals add together - hence the
name.
¦ Depth
As with the Hyper Chorus, the Depth Control will usually be the only control you need for achieving the
sound you want. At higher values you get a noticeable but delicate chorus, whilst lower values will create a
subtle stereo widening of the soundstage but without the typical beating of a chorus.
¦ X-Over
The X-over Parameter enables you to position the bass and middle frequencies of your signal to a stable
mono position between your speakers, while the highs will still oat around.
¦ Vibrato
The Vibrato effect modulates the pitch of the sound by a sine modulation.
¦ Rate
Use the Rate parameter to adjust the speed of the modulation.
¦ Depth
Use the Depth parameter to adjust the intensity of the modulation.
¦ X-Over
Use the X-Over parameter to blend out the vibrato effect for the lower frequencies of the signal. This will
guide you to an old-school modulation effect, quite similar to a scanner vibrato of a Hammond organ.