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The patch is an equation.
You write it.

ADEF Multi Poly Synth — a synthesis method specified in 1990, finally built. Not an algorithm you pick from a list: an expression you type, which the machine turns into sound. Around it, an 8-slot multitimbral workstation — 14 methods, the UNIQUENCER, MATCH EQ mastering, a sequencer, a song arranger and a live rig.

🎹 Also here — ERX10 V4.1, the Ensoniq ASR-10 re-imagined. Full Bundle $99 with code LONGLIVETHEASR at checkout.
ADEF — Additive Equation Formulation
ADEF MULTI POLY SYNTH · V1.1

ADEF Multi Poly Synth

A synthesis method specified in 1990 and finally built. The patch is an equation — and you write it, any equation you like, with the card rebuilding itself around what you typed. Around that: an 8-slot multitimbral workstation with 14 methods, the UNIQUENCER per-step effect sequencer, MATCH EQ mastering, a sequencer, a song arranger, a live rig, and an Ensoniq-format sample player.

14 METHODS
EQUATION ADDITIVE SINE 48 DRAW WAVE WAVE SHAPE AI SHAPE FM RING UNISON VOCODER OVERDRIVE DRAWBAR VZ CZ-1
AND
UNIQUENCER MATCH EQ FORMANT unit 20 mod sources Song + Live 700 presets AU / VST3 inserts Mac — Apple Silicon + Intel
📖 Read the manual — 33 sections, every jack and shortcut
ADEF Player — free AU + VST3 plugin
AU + VST3 PLUGIN · FREE · MAC + WINDOWS · V1.3

ADEF Player

Plays ADEF patches in your DAW — the ones you build free in the browser, and the ones the Mac app makes. Logic, Ableton, Reaper, Cubase, FL, Bitwig, GarageBand. Inside: the UNIQUENCER per-step effect sequencer, arpeggios, host tempo sync, half and double time, editable unison, five stereo outs (Main + FX1–FX4) and a sidechain input. Every wave and texture is baked into the binary, so there is no library folder to install.

FREE
No sign-up, no strings.
Universal — Apple Silicon and Intel, one download. Signed and notarized by Apple.

Build a patch free at the ADEF web generator, download it, and hit LOAD in the plugin. The Mac app above is where you build them by hand, arrange them and mix them.

The Windows ZIP includes 7 presets and 18 UNIQUENCER patterns, so it makes a sound without a second download.

ERX10 Edulator V4
ERX10 EDULATOR BUNDLE · V4

ERX10 Edulator

The definitive ASR-10 editor & sample creator. 8-slot multitimbral emulator, advanced wave editing, advanced sampling (SPLIT & REX, chop with effects), synth-wave-to-instrument, AU & VST3 plugins with FX3/FX4 inserts, EFE-direct, CDR library, MIDI, live plugin sync — everything, in one bundle.

BUNDLE INCLUDES
Standalone Editor AU + VST3 Plugins ($49) Library Control (free) Mac + Windows Free Updates
📖 Read the V4 Manual — full editor & sampler walkthrough
ERX10 ERX Rack — AU + VST3 Plugins V4
AU + VST3 PLUGIN · V4

ERX10 Plugins

Load ASR-10 instruments directly in your DAW — opens EFE files direct. Logic, Ableton, FL Studio, Reaper, Cubase, GarageBand — any AU or VST3 host. 8-slot multitimbral, full envelope/filter/LFO, FX1–FX4 with FX3/FX4 plugin inserts, live sync with the Edulator.

Already own the plugins? Upgrade to the full Bundle — sign in and you're charged only the difference (never re-pay for plugins).

ERX10 Sample Library Control
LIBRARY TOOL

ERX10 Sample Library Control

Browse, tag, preview your entire EFE / EFA / ERX / WAV library. Import SD cards, create disk images, batch convert. v4.0.0: new blue UI matching the Edulator, search now shows the full disk-image path, 2 GB image creation, custom tags in CATEGORIES — plus automatic ZuluSCSI SD prep. Free forever.

FREE
No sign-up, no strings.
Download, run, done.

ADEF Synth Sample Packs

Free · for the ADEF synth

The lean V4 app ships with ~30 MB starter waves. These are the full factory libraries for the ADEF synth — drag a .zip onto the Library and it installs and fills the matching OSC unit. Or make your own: drop WAVs into the My Samples folder.

🎁
ERX Factory Banks — all four, one download
ASR-10 + D-50 + JP-8000 + VFX-SD · fills every OSC unit at once · 1.44 GB
Download →
ASR-10 · fills ASR-10 OSC
5,397 samples · 407 MB
D-50 · fills D-50 OSC
407 samples · 405 MB
JP-8000 · fills JP-8000 OSC
198 samples · 387 MB
VFX-SD · fills VFX-SD OSC
190 samples · 276 MB

ZuluSCSI Starter Packs

Free · v3.0.3

Pre-formatted blank Ensoniq disk images for ZuluSCSI, BlueSCSI, and other SD-based SCSI emulators. Drop them on a FAT32-formatted SD card under SamplerZone/, plug it into your sampler, save your sounds. Pair with the Library Control to build, browse, and write to them.

📖
Read the V4 Manual
Full ZuluSCSI / SD card setup walkthrough · v4.0.0 · Library Control · workflows · troubleshooting
Open Manual →
ASR-10 · 7 disks
7 × blank ASR-10 image · 14 MB
ASR-10 · OS pre-installed
Single image with ASR-10 OS · 2 MB
ASR-X · 7 disks
7 × blank ASR-X image · 14 MB
EPS · 7 disks
7 × blank EPS image · 14 MB
EPS-16 PLUS · 7 disks
7 × blank EPS-16 PLUS image · 14 MB
WATCH IT RUN

Full ASR (excluding sequencer)

The complete ASR-10 workflow in ERX10 — sample editing, multitimbral instrument building, effects, and the plugin playing in a DAW. Everything the hardware does, minus the sequencer.

▶ Watch on YouTube

Current Versions

ERX10 Edulator — Mac
v4.1.0
Released 13 Jul 2026 · Apple Silicon + Intel
ERX10 Edulator — Windows
v4.1.0
Released 13 Jul 2026 · x64
ERX10 Plugins — Mac
v4.1.0
Released 13 Jul 2026 · AU + VST3 · + new ERX Rack Stereo
ERX10 Plugins — Windows
v4.0.0
Released 23 Jun 2026 · VST3
Library Control
v4.0.0
Released 22 June 2026 · Mac + Windows