Klavis
Logica
XT
user manual V1.0
Page
9
of
11
Audio use
Since there is already a divider hardwired to the Div/2 out jack, you end up with a divide by four
circuit. Feeding this function with an oscillator simultaneously gives sub-octave and two-octave
lower audio signals.
Digital Sample & Hold – D.S&H
For this function, the labeling of the inputs is on the right side of the jacks (Clock, In, and Clear).
This versatile function is made of a Sample & Hold followed by an optional gate-shaper. There are
two working modes depending on the pot position: the first half is for pattern delay, the second
half is for general purpose sample and hold with delay.
1. Pattern delay
This is useful to create delayed rhythmic patterns.
A regular trigger/gate at typical pattern rate is brought to the clock input.
A gate pattern is brought to the data input
The output will provide a delayed copy of the pattern but shaped with the phase and
duration of the trigger/gate signal.
By maintaining the Xtra button pressed, you can set by how many steps the pattern will be
delayed. Turning the pot within its first half, the LED column indicates the delay as follows:
LED off = 1; input is copied to out on the next clock
then up, one LED at a time corresponding to 2, 3, 4, 6, 8, 12 and 16 steps,
then by LED pairs, for 24, 32, 48, 64, 96, and 128 steps.
Note: as long as data input is at least partly On while the clock signal goes On, the output will
provide a delayed gate with the same length as the incoming clock.
2. Digital delay line
This is used to arbitrarily delay a digital signal for up 5000 steps with a clock of any rate.
Contrarily to the previous mode, the output signal is not reshaped according to the clock shape.
When no jack is present at the clock input, the module generates its own 1 KHz clock internally.
This gives you a delay adjustable up to 5 seconds with a 1ms precision.
By maintaining the Xtra button pressed, the right half of the pot allows adjusting the delay from
1ms to beyond 5000ms. The LEDs are lit in bargraph way.
Practical aspects of the delay line
With clocks slower than 1ms, much longer delays are achievable (e.g. 20 seconds with 4ms
precision).
Notes for audio purposes
If the clock is modulated, and using an audio mixer, one can create typical double-
tracking, unison and flanging effects.
