STERNBAHN
BUILD
BETA
MACOS
15+
MODULES
42
TRACKS
8
JOIN THE BETA

PRIVATE BETA · macOS 15+

Build a patch.
Turn it into a groove.

Sternbahn is a modular synth and groovebox for the Mac. Cable modules together, sequence eight tracks and shape every step, with SunVox underneath.

TRANSPORT
BPM124
SOUND
OUT 1
A

PATCH

IN 1

A modular that shows you where the sound goes.

All 42 SunVox module types are cards on a canvas. + ADD MODULE opens a shelf of every module, grouped by what it does, with a note on what each one is for. Drag a cable from an output to an input. The cards show the controls you use most; open a module for all of them.

BUILD A PATCHSHELF · CABLES · MODULATION · TURN THE SOUND ON IN THE CONTROLS
The module shelf: groups such as Voices, Drums and Space & time on the left, module tiles in the middle, and the Analog Generator's description with an Add to patch button on the right
MODULE SHELF+ ADD MODULE · ⇧⌘A · TYPE TO SEARCH
An LFO's modulation cable dropped on the Delay card opens a list of every Delay control to modulate
MODULATE DELAYFROM LFO

CONNECT

Drag from an output to an input. Audio and modulation cables stay visible, and pulse while it plays.

IN 1 ···OUT 1

MODULATE

Drag from an LFO, envelope or macro's MOD OUT onto a knob, or onto a card to pick any of its controls. The arc shows how far it swings.

IN 1 ···OUT 1

SAVE

Every patch is a SunVox project. Open it in SunVox on any platform it runs on.

IN 1 ···OUT 1
OUT 1
B

SEQUENCER

IN 1

Patterns that move past the bar line.

Eight tracks, each with its own length from 1 to 64 steps. Give a step a chance, a ratchet, a slide, an arpeggio or a parameter lock. Switch pattern slots A–H on the bar while it plays.

TRACKS
8
STEPS
1–64
SLOTS
A–H
PER STEP
CHANCE · RATCHET · SLIDE · ARP · LOCKS
SEQUENCER 2 TRACKS · POLYMETER
1 OSC 01 16
2 BLIP 12

Track 2 is 12 steps long, so it lines up with track 1 only every 48 steps.

POLYMETER GROOVESTEP PANEL · PARAMETER-LOCK LANE
OUT 1
C

PARAMETER EDIT

IN 1

Simple on the canvas. Precise when it matters.

Select a module and its editor opens beside the patch: FM routing, additive harmonics, sampler key zones, drawn waveforms and curves. The patch stays in view while you work.

Sternbahn with an FMX module selected; its routing matrix and operator controls fill the panel on the right
Close-up of the FMX routing matrix: operator 4 routed into operator 5
OUT 1
D

COLOUR SYSTEM

IN 1

Choose your atmosphere.

Six colour systems, from pale glass to dark and glowing. Each module family keeps its own colour, so you can read a patch at a glance. Try them: this page changes with the app.

The Polymeter Groove demo in the NEPTUNE colour system
NEPTUNEPALE BLUE-GREY GLASS
OUT 1
E

SUNVOX ENGINE

IN 1

Powered by SunVox. Open by design.

Under the cards is SunVox, Alexander Zolotov's modular synth and tracker. Sternbahn gives it a visual Mac front end without locking your work in: open Sternbahn files in SunVox, and SunVox songs in Sternbahn.

  • MODULESALL 42 SUNVOX TYPES
  • FILESSUNVOX PROJECTS, BOTH WAYS
  • EXPORTWAV · 16 / 24 / 32-BIT FLOAT
  • MACUNDO · AUTOSAVE · MIDI KEYBOARDS
WITH THANKS TO Alexander Zolotov

for creating SunVox and making its engine available to developers.

WARMPLACE.RU/SOFT/SUNVOX ↗
OUT 1

OUTPUT

IN 1

Take the first orbit.

The private beta is for SunVox users, Mac musicians curious about modular, and groovebox people who want to help shape the first release. It's free, and limited to 100 people.

F

QUESTIONS – BEFORE YOU PATCH IN

What do I need to run Sternbahn?

A Mac with macOS 15 or later. Sternbahn is a standalone app.

Is it an AU or VST plugin?

No. The first release is a standalone Mac app. It takes MIDI keyboards and exports WAV files.

What happens to my projects?

They are SunVox projects. Open them in SunVox on the other platforms it runs on, and open SunVox songs in Sternbahn.

Do I need to know SunVox?

No. Sternbahn comes with a full guide, from your first patch to sequencing a groove.

How many people can join the beta?

100. Places go in the order people confirm their email address. After that, sign-ups go on a waiting list and hear from us when Sternbahn is released.

How much will it cost?

The beta is free. The release will be a one-time purchase; the price hasn't been set yet.