Xaoc Devices BATUMI User manual

BATUMI
quadruple
low frequency
oscillator
Model of 1974
operator’s manual rev. 1974/4.0

sAlUT
Thank you for purchasing this Xaoc Devices prod-
uct. Batumi is a fully voltage-controlled quadru-
ple digital low frequency oscillator module with
lots of interesting user-customizable features.
Each LFO channel can be used independently or

total frequency range spans from 28 hours (in
voltage controlled divide mode) up to 500Hz.
InsTAllATIOn
The module requires 10hp worth of free space
in the eurorack cabinet. The ribbon type power
cable must be plugged into the bus board, paying
close attention to polarity orientation. The red
stripe indicates the negative 12V rail and should
align with the dot, –12V or red stripe marks
on both the unit and the bus board. The module
itself is secured against reversed power connec-
tion, however reversing the 16-pin header may
cause serious damage to other components of
your system by short-circuiting the +12V and +5V
power rails. The module should be fastened by
mounting the supplied screws before powering
up. To better understand the device, we strongly
advise the user to read through the entire manual
before using the module.
MOdUle OVerVIeW
Batumi features four identical LFO channels
      1controls
one of the four main parameters as determined
by the global mode setting. In free mode, each
slider determines its own channel’s frequen-
cy (from 0.01Hz to 100Hz). In the other three
modes, slider 1acts as a master to the remain-
ing channels’ frequency, allowing the remaining
sliders to perform other actions. For example, in
phase mode, sliders 2–4
in quad mode, sliders 2–4
and in divide mode, sliders 2–4-
vision of the master frequency. Frequency can
also be set with increased precision by entering
zoom mode, described later in this manual.
The frq/ph/div input 2allows the corre-
sponding slider parameter to be voltage con-
trolled (1V/oct). Doing so allows for an extended
frequency range from 500Hz all the way down
to 53 minutes! Expected voltage is –5V to +5V.
Above 100Hz, the waveforms tend to lose some
precision and amplitude.
The reset/sync input 3  
trigger input that can serve as either cycle re-
set or external tempo sync depending on the
jumper settings described later in this manual.
The sine output 4produces a sine waveform
(–5V to +5V). In quad and phase modes, the
sines are shifted in relation to one another. The
saw/asgn output 5produces either a default
upwards saw (ramp) waveform (–5V to +5V) or
one of the user-selectable shapes described later
in this manual. The square output 6produces
a square waveform (–5V to +5V).
The LFO sync mode toggle section 7allows the
four oscillators to run free or sync to the master,
as follows:
1. free lfO MOde
To enter this mode, click the central button
until the red, free LED lights up. Now, all four
LFO channels work independently.
2
module
explained

3

front panel
overview
1
2
3
4
5
6
7
10
11
8
9


2. QUAdrATUre lfO MOde
Click the central button until the yellow, quad
         -
trolling the frequency of all the remaining LFOs.
Each subsequent LFO generates a wave that is
90° shifted in relation to the preceding one (90°,
180°, 270°). In this mode, sliders 2–4 and the
CV inputs control the respective channel’s am-
plitude. The reset/sync 2–4 inputs allow for
additional control described later in this manual.
3. PhAse lfO MOde
Click the central button until the yellow, phase
LED lights up. phase mode is similar to quad
mode, except that the amount of phase shift can
be set arbitrarily. Sliders 2–4 and frq inputs are
active. The reset/sync 2–4 inputs allow for
additional control described later in this manu-
al. A tip: in phase mode, patch one of the LFOs
to control the phase shift of another. Stacking
LFOs results in new, complex waveforms.
4. dIVIde lfO MOde
Click the central button until the blue, divide
LED lights up. LFOs 2–4 are synced to LFO 1
with their frequencies occurring at divisions of
the master. Sliders 2–4 -
tio. Resulting cycle rates can be 2, 3, 4, 8, 16 or
32 times slower than the primary, master LFO’s
cycle. The reset/sync 2–4 inputs allow for ad-
ditional control described later in this manual.
reseT & sYnc InPUT
The reset/sync input can serve two different
purposes. In reset mode, an incoming trig-
ger impulse resets the LFO cycle to zero state
(hard sync). In sync mode (default setting)
the LFO frequency can be slaved to an external
clock source or tapped via manual gate so that
waveform phase is aligned to the external clock.
These modes are selectable by the jumper 8

reset, jumper present for sync) or via the Poti
module.
sYnced MOdes AddITIOnAl cOnTrOls
In quad, phase and divide modes, the second
reset input holds (pauses) all the LFOs, the
third reset input reverses the direction of the
waveform, and the fourth reset input selects
the next waveform (see “Assignable Wave-
forms”). Switching modes resets the waveform
to the default set by the jumper.
zOOM MOde
To enter zoom mode, hold the central button
for a second until the current mode LED starts
to blink. This mode upscales the slider travel
around the central value to allow for precise
adjustment. To exit zoom mode, press the cen-
tral button again. Upon exiting zoom mode,

value and slider position do not match. In di-
vide     
0–3 to the division set outside of zoom mode.
AssIGnABle WAVefOrMs
The saw/asgn
provide one of the alternate waveforms. The
    
ramp, saw, triangle and trapezoid. To assign
the desired waveform, use the jumpers clus-
ter 9on the back.
4

eXPAndABIlITY
The functionality of Batumi can be greatly en-
hanced by adding two Xaoc modules: Poti and Sa-
mara. Poti is a simple breakout panel providing
immediate front-panel access to the Batumi func-
tions otherwise selectable via rear-panel jumpers.
Samara is an independent multi-function module
offering four channels of attenuation, inversion,
offsetting, mixing and basic waveshaping.
fIrMWAre UPdATes
The standard Mini USB standard port 10 al-
lows for a quick update procedure. Detailed in-
structions and a special app (Win and OSX) are
  
on the Xaoc website. Mind the position of the
update jumper 11 . For power users, there is an
     

5
quadruple
lfo modes
free • four free running LFOs
90°
180°
270°
QUAd • 
cycle
cycle /2
cycle /3
cycle /8
dIVIde • divisions of the master LFO frequency rate
PhAse • variable phase shift
phase shift


MAIn
feATUres
Four digital
voltage controlled
LFOs
Free, Quadrature,
Phase and Divide
modes
Wide range, from
28 hours to 500 Hz
Assignable
waveform outputs
Zoom mode for
precise frequency
setting
Mini USB
conenctor for
easy updates
Alternate

Expandable
via Poti module
TechnIcAl
deTAIls
Eurorack synth
compatible
10hp, skiff friendly
Current draw:
+45mA / -15mA
Reverse power
protection
EASTERN BLOC TECHNOLOGIES MADE IN THE EUROPEAN UNION
WArrAnTY TerMs
XAOC DEVICES WARRANTS THIS PRODUCT TO BE FREE OF DEFECTS IN MATERIALS OR WORKMANSHIP,
AND TO CONFORM WITH THE SPECIFICATIONS AT THE TIME OF SHIPMENT FOR A PERIOD OF ONE YEAR
FROM THE DATE OF PURCHASE. DURING THAT PERIOD ANY MALFUNCTIONING OR DAMAGED UNITS
WILL BE REPAIRED, SERVICED, AND CALIBRATED ON A RETURN-TO-FACTORY BASIS. THIS WARRANTY
DOES NOT COVER ANY PROBLEMS RESULTING FROM DAMAGES DURING SHIPPING, INCORRECT INSTAL-
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OBVIOUS USER-INFLICTED FAULT.
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reTUrn POlIcY
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