eurorack_daisy_patch_init

Makefile-based firmware projects built on top of Electrosmith libDaisy and DaisySP, with some ports that also use Mutable Instruments' eurorack sources.

This repo is intended to be self-contained via git submodules (no shared external ../deps tree).

Released modules

Firmwares offered as finished modules are named after the nursery rhyme ("one for sorrow, two for joy…" — hence Eight4aWish):

Name	Firmware	Version	Based on	Licence
Sorrow	daisy_grids/	v2.4.1	Mutable Instruments Grids	GPL-3.0-or-later
Joy	daisy_braids_oled/	v1.4.0	Mutable Instruments Braids	MIT
Joy Lite	daisy_joy_lite/	v1.4.0	Mutable Instruments Braids	MIT
Mirth	daisy_neural/	v1.0.0	NAM A2-Lite neural amp captures, and twelve not-amps	MIT
Mirth Lite	daisy_neural/ (make LITE=1)	v1.0.0	as Mirth, for a stock patch.init()	MIT
Secret	daisy_chaos/	v1.1.0	original (the Teensy Chaos), on the Hermetic Modular Alchemy SDK	MIT
Wish	daisy_beads/	v1.0.0	Mutable Instruments Beads, on the Hermetic Modular Alchemy SDK	MIT
Wish on Daisy patch.Init()	daisy_beads_patch_init/	v1.0.0	Mutable Instruments Beads, for a stock patch.init()	MIT

Joy and Joy Lite are the same macro-oscillator generation (shared calibration and DSP, so they carry the same version): Joy is the full 48-model version with an OLED navigator; Joy Lite is screenless — a curated 16 models (the ones Plaits doesn't cover) navigated by LED + button + toggle.

These are independent community works for the Electrosmith Daisy Patch Init, and Secret and Wish for the Hermetic Modular Alchemy Lab. Product names of other makers are used only to describe each firmware's origin — not affiliated with, or endorsed by, Mutable Instruments, Electrosmith or Hermetic Modular.

Build guides and downloads

Prebuilt .bin files, flashing instructions, panel STLs and a wiring guide for each module: https://eight4awish.com/modules/

Getting in touch

Email [email protected].

I usually have a few spare front panels over from each print run — if you would like one, say which module and roughly where you are and I will come back to you on postage.

Questions about building or flashing are best raised as an issue, so the answer stays available to whoever hits the same thing next.

Clone

git clone --recurse-submodules <repo-url>
# or, if already cloned:
git submodule update --init --recursive

Submodules are expected at:

• deps/daisy/libDaisy
• deps/daisy/DaisySP
• deps/mutable/eurorack

Build

These projects link against the static libraries built by libDaisy and DaisySP (and for some effects, DaisySP-LGPL).

You can either build the libraries once up-front:

make -C deps/daisy/libDaisy
make -C deps/daisy/DaisySP

…or just run make in a project directory; most project Makefiles will build any missing libraries automatically.

Most projects default to using repo-local deps. Typical usage:

cd daisy_multiosc
make

If you keep Daisy deps elsewhere, you can override on the command line:

make DAISY_ROOT=/path/to/daisy

(That directory must contain libDaisy/ and DaisySP/.)

Projects

• daisy_multiosc/ – boot-selectable multi-engine synth for the Daisy Patch Init: pick a voice at power-up, all sharing one universal panel + OLED legend (BOOT_QSPI). Engines: FM4OP (4-op FM), INTVL (dual interval oscillator), SCAN (scanned synthesis), WAVES (plain VCO: sine, triangle, saw, square). See its README, the control contract in docs/PANEL.md, and docs/ROADMAP.md.
• daisy_grids/ – Sorrow — drum machine: a pool of ten DaisySP drum models rolled by the B8 toggle, three pattern banks (one Grids' own, two derived here from open MIDI corpora via a self-organising map), per-part densities and automatic clock-resolution detection, based on Mutable Instruments Grids (GPL-3.0-or-later). Runs BOOT_SRAM, so it needs the Daisy bootloader.
• daisy_braids_oled/ – Joy — macro oscillator (48 models) with 64x48 OLED menu navigation, based on Mutable Instruments Braids; on-module V/Oct calibration (hold B7 at power-up)
• daisy_joy_lite/ – Joy Lite — screenless sibling: a curated 16 Braids models (the ones Plaits doesn't cover) in two toggle banks, model number shown by LED blink
• daisy_multifx_oled/ – Multi-effect processor with 64x48 OLED: 16 effects in a 4×4 grid (Reverb / Delay / Tone / Misc banks), built on the shared multifx_core library (also runs on a bare Daisy Seed with a homebrew front end — see daisy_multifx_seed/)
• daisy_fm4op/ – 4-op FM synth (standalone build, and the FM4OP engine for daisy_multiosc)
• daisy_interval_osc/ – INTVL — Nick Donaldson's IntervalOsc: dual oscillator with quantized interval offset (ndonald2/DaisyPatches, MIT — see ). His patch and README are kept as written; the multiosc engine is a port of that DSP onto the universal panel

Shared code

• common/multiosc_core/ – host/framework for daisy_multiosc: the Engine interface, boot chooser, B7 gestures (short = cycle, long = Play/Edit), soft-takeover, and the OLED legend. See its README.
• common/multifx_core/ – portable, DaisySP-only MultiFX DSP/UI core (reverb, delay, tone and misc effect banks, output voicing, and a Bank/Patch navigation model) shared by daisy_multifx_oled (and its homebrew Daisy Seed variant), and intended for reuse on other Daisy boards. See its README.
• common/chaos_core/ – platform-independent chaotic-attractor DSP (<math.h> only): the ChaosBase interface, twelve RK4 attractors in two banks, the Voice renderer, and host tools (characterise, periodmap, pitchmap). Moved here from eurorack_modules. See its README.
• common/voct_cal.h + common/joy_dsp.h – shared by Joy and Joy Lite: the two-point V/Oct calibration math, and the envelope + fixed-point DSP helpers. Only each build's front-end (OLED navigator vs screenless LED/toggle) differs.
• common/ also holds the shared oled_soft_i2c SSD1306 driver used by the OLED projects.
• common/tools/ – host-side panel checks (make check): builds the real OLED driver and the real legend/menu layout with a PC compiler and asserts nothing falls off the 64x48 screen. The panel fails silently — a row one pixel too low draws nothing at all — so this catches layout bugs without a bench cycle. See its README.

Credits & Licenses

This repository combines original code with several third-party ports. Original code and integration work is MIT-licensed (see LICENSE). Vendored and submoduled sources retain their own licenses and copyright headers, which are kept intact. Names below are trademarks/marks of their respective owners; the ports here are community works and are not official or endorsed.

Component	Author / upstream	License
libDaisy, DaisySP	Electrosmith	MIT
DaisySP-LGPL (linked by daisy_interval_osc, daisy_multiosc)	Electrosmith + upstreams	LGPL-2.1
Alchemy SDK (deps/alchemy-sdk, linked by daisy_chaos / Secret and daisy_beads / Wish) – Alchemy Lab board support and framework	Hermetic Modular (alchemy-sdk)	MIT. Everything compiled into secret.bin and wish.bin, with the notices a binary must carry: daisy_chaos/NOTICES.txt, daisy_beads/NOTICES.txt
daisy_chaos/panel/ (Secret faceplate) – the KiCad front-panel template it is made from	Hermetic Modular (alchemy-sdk/panel)	MIT (notice)
daisy_braids_oled (Joy) – Braids DSP	Émilie Gillet (Mutable Instruments, eurorack)	MIT
daisy_beads (Wish) and daisy_beads_patch_init (Wish on Daisy patch.Init()) – Beads DSP, and the one header it changes (src/upstream/)

Notes:

• Modifications. Ported sources have been modified for this hardware (for example, replacing the panel toggle switch with an OLED screen and on-screen control legends). Modifications are noted in the relevant file headers alongside the original copyright notices; the original notices are never removed.
• GPL (Sorrow). Mutable's Grids is GPL-3.0-or-later — unlike most of the eurorack sources, which are MIT. So daisy_grids (Sorrow) is copyleft: distributing it, source or binary, obliges you to pass on the complete corresponding source under the GPL. It cannot be relicensed to MIT/CC0. The full GPL text is daisy_grids/COPYING.
• Notices with every release binary. A .bin is our code compiled together with libDaisy, ST's HAL and CMSIS (and, by app, the Alchemy SDK, DaisySP or Braids), and those licences ask for their notices to go with a binary as well as with the source. common/tools/notices.py writes <app>/NOTICES.txt from the licence files in the sources each build uses. Each release attaches it as <tag>-NOTICES.txt (Secret, Joy, Joy Lite and Sorrow since 2026-10-02; Wish and Wish patch.Init() from their first releases).
• LGPL. daisy_interval_osc links Electrosmith's DaisySP-LGPL. Because full source is published here, LGPL relinking obligations are satisfied. If you distribute prebuilt binaries (e.g. attaching .bin files to a release), include a pointer to this source so the LGPL portions can be relinked.
• Trademarks vs. copyright. The licences above grant rights to the code, not to product names ("Braids", "Grids", "Beads", "Mutable Instruments", "Daisy"). Released modules therefore carry their own names (Sorrow, Joy); the originals are cited only to describe lineage. These are community works and do not imply endorsement.