Specifications

PARAMETER REFERENCE MANUAL72
EFFECT PARAMETERS
¦ X-Over
Each of the new chorus types in OS 4.2 features a X-Over (crossover) parameter. By turning up the value
of X-Over you can shield the lower frequencies from the inuence of the chorus modulation, thus giving the
sound a stable bottom-end. This feature was inspired by specialised bass chorus units; we found, however,
that this type of crossover control is not merely an advantage for bass sounds - it is suitable for shaping any
sound.
Note: If you happen to own an original chorus unit from the analog era, you may notice that our choruses
don’t feature a volume boost when you switch them on. This is because of our philosophy to always try to
have equal volumes on our effects, compared to the unprocessed signal. This makes it easier for you to nd
the best effect based purely on its character, and not to favour one effect over another simply because of its
volume boost.
HyperChorus
The Hyper Chorus is probably one of the most advanced choruses ever made; it is a six- voice chorus with
up to three delay lines each for the left and right side. Despite this, it is staggeringly simple to use, as it is
usually only necessary to adjust only the Depth parameter to achieve a huge, warm sound.
¦ Depth
By adjusting Depth you change the amount of detune and fatness that the chorus adds to the signal - every-
thing else is perfectly adjusted to give you the lushest chorus sound with no further tweaking necessary. You
can even choose very small detunes without the typical comb lter effect of a regular chorus, and when you
bring Depth to zero the chorus effect completely goes away, even with the Mix parameter left at full position.
¦ Amount
As the full sound could be too complex, you have the option to draw delay lines in and out of the chorus.
With the Amount parameter you can continuously control the numbers of delay lines from one to three per
side. So yes, even 1.5 choruses are possible: this simply means one chorus is at full volume, the other is at
half - you can think of the Amount parameter as being roughly equivalent to the Oscillator Amount parameter
for the HyperSaw oscillators of the Virus.
¦ Mix
Use the Mix parameter to adjust the balance between the dry input signal and the output of the chorus ef-
fect. For the maximum chorus effect, Mix should be set to 127.
Note: When using the Classic chorus, Mix should be still be set to the middle position (64) for maximum ef-
fect.
Modulation destination “ChorusMod Depth“.
¦ Mod Shape
Sine, Triangle, Sawtooth, Square, S&H, S&G: Selects the waveform used to modulate the Delay parameter.
Vintage Chorus
TIOS 4.5 brings several new types of chorus effect to the Virus TI series, ranging from faithful models of re-
nowned vintage chorus and tremolo effects, to the brand new Hyper Chorus.
The Vintage Chorus is an emulation of the 70’s chorus technology based on a technique known as “bucket
brigades”, which can be considered a predecessor of today’s digital sampling technology. The Vintage Cho-
rus covers not only the exact sound of the famous Chorus Ensemble but also many other derivatives of that
era which were based on the same basic circuitry, most notably that of the built-in chorus of the Juno 60.
You may notice the somewhat dull sound of the effect signal; this is due to the limited sample-rate of the
bucket brigade. When this signal is mixed to the direct sound, it will result in a very warm chorus sound, be-
cause the overall signal gets a low and mid frequency boost. The Vintage Chorus is always in full stereo as
you have one chorus each for the left and right sides, modulating in opposite ways.
¦ Rate
Use the Rate parameter to adjust the speed of the chorus modulation.
¦ Depth
Use the Depth parameter to adjust the intensity of the chorus modulation
Tip: For the original Chorus Ensemble sound leave the Depth parameter at middle position and dial your
sound by the Rate parameter - the original did not have a depth control.
For the original “Juno 60” Chorus sound leave Depth at 100% and dial your sound by adjusting Rate. The
“Juno 60” Chorus did not have a Rate or Depth control, just two buttons labeled ‘I’ and ‘II’ to switch be-
tween two rates - the equivalent settings in the Vintage Chorus can be achieved by setting Rate Control at
25% (I) and 45% (II).
¦ Mix
Use the Mix parameter to adjust the balance between the dry input signal and the output of the chorus ef-
fect. For the maximum chorus effect, Mix should be set to 127.
Note: When using the Classic chorus, Mix should be still be set to the middle position (64) for maximum ef-
fect.