Klavis
Logica
XT
user manual V1.0
Page
6
of
11
Xor & Xnor
This logic option works like the OR, except that the main output goes off when all active jacks are
on. In the Logica XT an unusual 3-input Xor is implemented whose results are different from
chaining multiple 2-input Xor gates.
Also, conversely to other simple logic modes, the button is not equal to an input jack. Instead, it
feeds a cascaded Xor function. See the logical chain hereafter.
Out
in 1
in 2
in 3
Manual
stored value
(default = 0)
Xor can be used as a “digital ring modulator” such as implemented in the ARP Odyssey and KORG
MS-20 synthesizers. Feed two inputs with two oscillators to get the effect.
With 3 oscillators feeding this 3-in Xor, you can create sounds much different from cascading
multiple 2-input Xor; the div/2 out can even provide melodies out of subtly detuned static pitches!
Here is the detail of the Xor/Xnor function:
Input jacks
Out jack = Xor
Inv jack = Xnor
All low
low
high
One or more high, but not all
high
low
All high
low
high
When only two jacks are connected you get a standard two-input Xor function
When a single jack is connected, the first Xor is bypassed
The manual button inverts the final result
Even & Odd
The main output goes on when an even number of inputs – including the button – are on. The
inverted output works the same for an odd number of inputs. The button defaults to off.
A sum of zero is considered even.
This function, made of chained Xor can also do a digital ring modulator, albeit less creative
musically than the dedicated 3-input Xor function above when used with 3 signals.
in 1
in 2
in 3
Manual
stored value
(default = 0)
Out
