Knobs are sliders: arrow keys, Page Up and Page Down. Jacks are buttons: press Enter on a jack to pick up its cable or start a new one, then Enter on another jack to plug it in. Escape cancels. Delete pulls the cable.

FI-P01Eurorack voice16 HP

One oscillator, a wavefolder, a resonant filter, a VCA and an LFO, in sixteen HP. Digital where it helps. Analog where it shows.

  1. TurnDrag a knob up or down. Arrow keys work too.
  2. PatchPull a plug and drop it in another jack. Outputs feed inputs.
  3. HearSilent until you press .

PATCH-01

02Assembly

Six layers. Nothing loose.

Everything you touch is bolted to the panel, so nothing flexes when you patch in the dark. Taken apart, it still makes sense.

  1. 1Screws4×M3 button head, black oxide.
  2. 2Knobs6×Turned aluminium, diamond knurl, orange index.
  3. 3Hardware14×Hex nuts and washers. Torqued, not glued.
  4. 4Panel1×2 mm 5052 aluminium, brushed, laser-engraved.
  5. 5Control board1×Pots, jacks, LEDs and the 1.8-inch scope.
  6. 6Main board1×96 kHz DSP, analog filter and VCA, keyed power.

03Signal

Follow the signal.

The scope is the module’s own screen. Scrolling moves the probe from stage to stage. With power on, you hear what you see.

  1. 01OSC

    A morphing core. SHAPE sweeps sine, triangle, saw and square. Tracks 1 V/oct over seven octaves.

  2. 02FOLD

    Below noon it warms. Past noon the wave folds back on itself and grows harmonics you did not ask for.

  3. 03FILTER

    Two-pole low-pass, analog, resonant. It files the edges off whatever the folder made.

  4. 04VCA

    Normalled open. Patch a CV into it and the level follows. The LFO makes it breathe.

  5. 05LFO

    0.05 to 20 Hz, triangle and square. It drives the LEDs too, so you can read the tempo from across the room.

Probe
OSC
Time
2.0 ms/div
CV in
None

Every patch has a shape.

Plot the output against itself a fifth of a cycle later, and again, and the sound draws its own figure in three dimensions. This one is the patch you made at the top of the page.

04Specification

Measured, not rounded.

Every figure below comes from the same drawing the panel is cut from.

Front and side elevations, millimetres. Depth includes the power header.
PATCH-01 specification
FormatEurorack, 3U
Width16 HP / 80.9 mm
Depth32 mm including power header
Power+12 V 92 mA / −12 V 38 mA / +5 V unused
InputsV/OCT, FOLD, CUT, VCA / ±5 V
OutputsOSC, OUT, LFO, SQR / 10 Vpp
Controls2 × 17 mm and 4 × 10.5 mm knobs
OscillatorSine to square morph / 27.5 Hz to 3.52 kHz
Wavefolder1 to 8 folds, sine law
Filter2-pole low-pass, 12 dB/oct, resonant
LFO0.05 to 20 Hz, triangle and square
Display1.8-inch, scope and tuner
Panel2 mm aluminium 5052-H32, brushed or black anodised
Weight118 g

05Order

Pick a finish. We do the rest.

Panel finish

$349First batch ships February 2027. Full refund until it does.

In the box: the module, a 10-to-16 pin power ribbon, four M3 screws, and the two cables from the top of this page.