ANALOGUE EURORACK · TALLINN
Twelve modules. Every schematic published.
Analogue Eurorack from a workshop in Tallinn. Through-hole where it matters, matched transistor pairs in every VCO, and a full schematic and BOM in the box so you can fix it in twenty years.
134HP
FULL RANGE WIDTH
640mA
+12V TOTAL DRAW
2 DAYS
SHIPS FROM ESTONIA
VX-3 DUAL VCO · 14HP
Matched transistor pair, through-zero FM, 0.2 cent drift over an hour. Four trimmers on the back, all of them documented.
01 — THE RANGE
The catalogue, with the numbers on the tile
HP width, current draw on both rails, and the price. Nothing hidden behind a datasheet link, because you are planning a case and you need all three at once.
12 MODULES · 134HP · 640mA / 310mA
VX-1
8HP
Quad Attenuverter
22mA +12V / 18mA -12V
DC-coupled, unity gain at centre detent, four channels normalled down
119
EUR · IN STOCK
VX-2
6HP
Noise & Sample
24mA +12V / 14mA -12V
Transistor avalanche noise, white and pink outputs, clocked S&H
129
EUR · IN STOCK
VX-3
14HP
Dual VCO
78mA +12V / 32mA -12V
Through-zero FM, matched pair, 0.2 cent drift over an hour
289
EUR · IN STOCK
VX-4
10HP
Ladder VCF
46mA +12V / 40mA -12V
Four-pole transistor ladder, self-oscillating, gain compensation trim
219
EUR · IN STOCK
VX-5
12HP
State Variable VCF
52mA +12V / 44mA -12V
Simultaneous LP, HP, BP and notch, 1V/oct tracking to five octaves
239
EUR · IN STOCK
VX-6
10HP
Dual ADSR
38mA +12V / 20mA -12V
Two envelopes, 0.8ms to 24s, end-of-cycle gate on both channels
169
EUR · IN STOCK
VX-7
8HP
Function Generator
44mA +12V / 26mA -12V
Slew, LFO and AD in one, cycles into audio at 6kHz, voltage controlled
189
EUR · IN STOCK
VX-8
8HP
Stereo VCA
40mA +12V / 34mA -12V
Linear and exponential response, discrete output stage, 1dB channel match
159
EUR · IN STOCK
VX-9
16HP
Analogue Delay
92mA +12V / 38mA -12V
Two BBD lines, 18ms to 640ms, companding with a defeatable clock filter
329
EUR · IN STOCK
VX-10
12HP
Spring Reverb
74mA +12V / 22mA -12V
Three-spring tank, dwell and tone controls, tank socket on the rear
249
EUR · IN STOCK
VX-11
20HP
Sequencer 8
86mA +12V / 12mA -12V
Eight steps, two rows, analogue gate bus and a hand-wired step switch
279
EUR · IN STOCK
VX-12
10HP
Output & Cue
44mA +12V / 10mA -12V
Balanced outs on the rear, cue bus, and a headphone amp that drives 32 ohm
179
EUR · IN STOCK
02 — SIGNAL PATH
What is analogue, and what is not
The audio path is entirely analogue. The only digital parts are the tuning helper and the preset memory, and both can be bypassed with a jumper on the back.
We say this plainly because the word analogue gets stretched. No DSP sits between your input jack and your output jack on any module in the range — measure it if you like, the test points are marked on the board.
ANALOGUE
Oscillator cores
Discrete, matched pair, temperature compensated
ANALOGUE
Filters and VCAs
Transistor ladder and OTA, no lookup tables anywhere
ANALOGUE
Envelopes and LFOs
RC timing, voltage controlled, sub-millisecond attack
DIGITAL
Tuning helper
A microcontroller reading pitch. Jumper JP1 removes it.
DIGITAL
Preset memory
Stores knob positions only. Jumper JP2 removes it.
03 — OPEN BY DEFAULT
Open schematics and the repair policy
Full schematics, board files and calibration procedures are published for every module, including discontinued ones. Repair it yourself, or send it to us at cost plus postage forever.
SCHEMATIC PDF
Every revision, including the two we got wrong in 2017
GERBERS AND BOM
Board files and a sourced parts list with substitutions marked
REPAIR AT COST
Parts plus postage, no labour charge, no expiry date
SPARES FOREVER
Panels, knobs and matched transistor pairs sold individually
04 — CALIBRATION
Eleven minutes, at your desk
Eleven minutes with a multimeter and a tuner, four trimmers, and a printed card that walks you through it. No proprietary jig, no returning it to the factory.
00:00
Warm up
Power the module in the case and leave it for three minutes. Cold trimming is why people think analogue drifts.
03:00
Scale, TR1
Play C2 and C4, adjust until the octave is exact on the tuner. Two passes, it converges.
07:00
Offset, TR2
Set the low reference against the meter at the marked test point. One turn, rarely more.
09:00
Shape, TR3 and TR4
Trim the triangle apex and the pulse symmetry by ear or by scope. Write the date on the card.
05 — DEMO PATCHES
Six patches, written out in full
Not videos. Descriptions you can follow with cables in your hand, using modules you can see on the tiles above.
01
Through-zero drone
VX-3 · VX-5 · VX-10
Both VCO cores at 55Hz, one modulating the other through zero, into the state variable filter in notch and out to the spring tank at full dwell. Sits still for twenty minutes and never repeats.
02
Ladder kick
VX-4 · VX-6 · VX-8
Self-oscillate the ladder, pitch it with a fast decay envelope, and shape the tail on the exponential VCA. Tune the resonance trimmer for the body you want.
03
Clocked sample chatter
VX-2 · VX-11 · VX-3
Sample and hold on white noise, clocked from the sequencer gate bus, into the second VCO exponential input. Attenuvert it down until it is pitch and not noise.
04
Two-hand generative
VX-7 · VX-1 · VX-5
Two function generators cycling at unrelated rates, cross-patched through the attenuverter to each other, sweeping the filter cutoff from both directions at once.
05
BBD feedback bed
VX-9 · VX-8 · VX-12
Delay output back into its own input past unity, VCA in the loop to keep it from running away, cue bus so you can hear it building before it hits the mix.
06
West coast bass
VX-3 · VX-7 · VX-8
Single VCO into the function generator used as a lowpass gate substitute, struck by the sequencer gates. Short strikes, long strikes, one knob between them.
06 — POWER BUDGET
Will it fit your case?
The whole twelve-module range draws 640mA on +12V and 310mA on -12V. Type your case into the calculator and it will tell you honestly if you are cutting it fine.
CASE
SUPPLY
VERDICT
84HP skiff, 1.4A supply
1400 / 1200mA
Six modules comfortably
104HP two-row, 2A supply
2000 / 1500mA
The full range, headroom to spare
84HP with a 1A brick
1000 / 500mA
Cutting it fine past nine modules
62HP portable, 0.6A supply
600 / 300mA
Four modules, and skip the delay
The calculator adds a twenty percent margin by default, because a supply running at its rating all evening is a supply that gets warm and starts adding hum to your VCAs.
07 — KIT OR ASSEMBLED
Which one should you buy
Kits are 35 percent cheaper and take about four hours. Buy the kit if you have soldered before. Buy assembled if this would be your first board and you want to make music this month.
KIT
-35% · ~4 HOURS
Through-hole throughout, no pre-placed SMD to be scared of
Sorted and labelled parts, printed build guide, spare trimmers
Matched transistor pairs come pre-matched and taped in order
One free replacement board if you cook one, no questions
Buy the kit if you have soldered before.
ASSEMBLED
CALIBRATED · TESTED
Built, burned in for 24 hours and calibrated on our bench
Same schematic, same BOM, same repair policy, same trimmers
Ships in 2 days from Estonia with the calibration card signed
Two year warranty, and repair at cost after that forever
Buy assembled if this would be your first board.
08 — ORDER
Order direct, or find a dealer
Ships from Estonia in 2 days. Dealers in nine countries listed with stock levels updated nightly.
VOLTMOOR VX · TALLINN, ESTONIA · SCHEMATICS FOR EVERY MODULE, INCLUDING THE DISCONTINUED ONES