Xaoc Devices — Batumi

Manual PDF

Xaoc Devices Batumi II & Poti II Manual (PDF)

Xaoc Devices BATUMI II + POTI II

Quad LFO/OSC & Expander
Concise Cheat Sheet (2024/2.0, "Models of 1974")

Panel Reference

Sliders (x4, illuminated)

A (top): Always controls Channel A Frequency (0.01Hz–100Hz unpatched; up to 5kHz w/ CV).
B, C, D: Control Frequency, Phase, Divide, or Multiply depending on Global Mode.

Buttons

MODE: Cycles through main modes:
RED Free – 4 indep. LFOs/VCOs
YELLOW Phase – B, C, D follow A freq, w/ phase offset
BLUE Divide – B, C, D = A’s freq divided by integer
TURQUOISE Mult – B, C, D = A’s freq multiplied by integer
WAVE: Cycles asgn waveform:
Red: Triangle
Yellow: Down Saw
Orange: Up Saw
Green: Trapezoid
Blue: Stepped Random
Turquoise: Smooth Random
MODE+WAVE (hold one, tap other): Toggles SYNC/RESET for sync inputs.

Inputs & Outputs (per channel)

JACK	TYPE	VOLTAGE	DESCRIPTION
FRQ•PH•RTO	CV IN	-10V/+10V	Controls freq, phase, div/mult (V/oct in Free, ±5 cycles in Phase)
RESET•SYNC	Sync Trigger In	5V gate/trig	Resets or syncs the phase/freq; toggle mode per channel
SINE	Output	±5V	Anti-aliased sine wave output
ASGN	Output	±5V	Assignable wave (see above)
RECT	Output	±5V	Anti-aliased pulse/square output (fixed width in most modes)

All outputs are bipolar ±5V.

Modes Overview

Free (indep. LFOs/VCOs, 1V/oct)
All channels independent.
Sine, Rect, Asgn outputs.
Use CV and sliders for full frequency sweep.
Random asgn are truly independent.
Phase (B-D = A freq, variable phase)
Channels B-D are phase-shifted copies of A.
CV modulates phase ±5 cycles per input.
Random waves: same sequence delayed.
Divide (B-D = A freq divided by 1/2/3/4/5/8/16/32)
Division set by sliders & CV.
Random: Downsampled sequence from A.
Max cycle: up to 37.9 days at min freq/CV!
Mult (B-D = A freq multiplied by 1/2/3/4/5/8/16/32)
Integer multiples of A’s cycle set by sliders/CV.
Limited to 5 kHz max channel freq.
Random: Upsampled sequence from A.

Tempo Sync

RESET: Incoming trig/gate resets phase to 0.
SYNC: Follows tempo of external source, quantized frequency division after sync (as in Divide).
NOTE: All 4 channels can sync in Free; only A syncs in other modes.

Poti II (Expander, 4HP) Controls

Knobs (per channel, selected by button/LED)

FRQ•PH•RTO CV: Input CV Attenuation (per channel, ALL mode also)
SINE OUT: Sine output attenuation (per channel, ALL mode also)
ASGN OUT: Asgn output attenuation (per channel, ALL mode also)

Rect outputs cannot be attenuated.

Channel Button

Cycles between A/B/C/D/All (LED color changes). Stores settings per channel.
Unplugging resets to default (no atten).

Wave CV Inputs and Switches

SHAPE (CV IN, ±5V):
SINE: Wavefold (with amp comp)
ASGN: Morphs through assignable waveforms
RECT: Modulates pulse width
Switch: Selects which output is modulated by CV for the selected channel.

Quick Reference

Control	Function
Sliders (x4)	A: frequency; B/C/D: freq/phase/div/mult by mode
Mode Button	Mode (Free/Phase/Divide/Mult)
Wave Button	Sets (or morphs, with Poti II) asgn waveform
Mode+Wave	Toggles Sync/Reset (per channel, LED feedback)
FRQ•PH•RTO CV IN	Voltage (-10V/+10V), 1V/oct in Free, phase, or div/mult
RESET•SYNC	Gate/Trigger for phase/freq reset/sync
Sine/Asgn/Rect	Outputs, ±5V
Poti II Knobs	CV/sine/asgn attenuation, per channel, switchable
Shape CV + Switch	Choose and modulate sine/asgn/rect per channel

Voltage Ranges

Outputs: ±5V
Input CV: –10V to +10V (FRQ•PH•RTO inputs)
Shape CV: ±5V

Useful Tips

1V/oct tracking in Free mode only! (use as quad VCO)
External Sync disables continuous freq control (slider/CV = division factor).
With Poti II, set attenuation per channel & modulate wave shapes.
Reset/Sync jacks on each channel: get polyrhythms/LFO sync tricks!

Physical Installation

Batumi II: 10hp, 45mm deep, 90mA/+12V, 50mA/-12V
Poti II: 4hp, 32mm, 10mA/+12V (powered only via Batumi II)
DO NOT CONNECT Poti II TO BUS BOARD! Use supplied ribbon cable.

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