Specifications
PARAMETER REFERENCE MANUAL50
MOD MATRIX PARAMETERS
¦ AnaKey 1/2 Fine
Use these modulation sources to offset parameters that affect pitch on certain keys. This might include the
cutoff of a lter with very high resonance.
Note: when applied to other parameters, the effect of Analog Key 1/2 Fine will likely be so subtle that you
won’t notice any difference. In this case, please try one of the Coarse versions instead.
¦ AnaKey 1/2 Coarse
Use these modulation sources to offset the value of any parameter in the Mod Matrix on certain keys. In
most cases, you will nd these unsuitable for modulating pitch, as the effect is extreme, even when modula-
tion Amount = 1.
¦ Constant Offsets
The internal resolution of the parameters in the Virus sound engine is 24-bit, which theoretically allows for
approximately 16 million different values for each continuously variable parameter. The MIDI specication,
however, only allows for a resolution of 128 values per parameter.
Now, in most situations, a resolution of 128 values is plenty, as it still allows you to get “close enough for
government work”. There are occasions, however, when you might nd you really want to tune a parameter
so precisely that the value you need is somewhere in between two of these 128 positions. This is why we
have introduced the ability to apply a constant offset to any continuous parameter via the Mod Matrix.
¦ 1% Constant
Use this to ne tune any continuous parameter by up to 1% of the available range. This will likely only be no-
ticeable when modulating parameters that affect pitch, including the cutoff frequency of a lter with very high
resonance.
¦ 10% Constant
Use this to ne tune any parameter by up to 10% of the available range. In situations when Offset 1% is too
subtle, try this instead.
Tip: By targeting another mod slot with a constant offset, you can achieve much higher precision in the Mod
Matrix than is otherwise possible.
In TIOS 4.5 each of the 3 LFOs can now be selected in unipolar mode. This means that the modulation only
occurs in one direction away from the current value of the target parameter.
*In the list of modulation sources, you will see each LFO listed as both bipolar and unipolar. You are free to
select either version of a particular LFO for any modulation slot within the same patch, as the LFO itself is
not affected by the selection.
¦ Analog Key
Many of us have owned a vintage analog synth at some time or another, and most of those that have will be
only too aware of their tendency to become increasingly unpredictable in their behaviour. Unstable tuning
and inconsistent key-tracking are just two typical symptoms of this. The funny thing is, these characterful in-
stabilities can be just as inspiring as they are infuriating - it is often these little quirks that help a sound stand
out in the mix.
In TIOS 4.5, we have provided a way to introduce some of these quirks into the Virus, by way of the Analog
Key modulation sources. The idea is to deliberately skew the key tracking in such a way as to create incon-
sistency across the keyboard, but in a repeatable way. So, by this method, you can make it so that certain
keys are always off pitch by a certain amount, or are duller or brighter than the keys on either side, for in-
stance.
There are two variations of these offsets, allowing you offset different parameters by a different arrangement
across the keyboard. Each version is available as either Fine or Coarse.