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Wish on Alchemy Lab

Alchemy LabGranularEffect

Granular textures for the Alchemy Lab, based on Mutable Instruments Beads — freeze and seed.

Download firmware v1.0.0Source on GitHub

Sequence it with Strudel.

Overview

On a Daisy patch.Init()? The same Wish runs on a stock one: Wish on Daisy patch.Init().

Wish is a granular texture synthesiser for the Hermetic Modular Alchemy Lab, based on Mutable Instruments Beads — Émilie Gillet’s successor to Clouds. Mutable published the Beads source on 12 October 2026; the DSP here is that code, with one build flag changed (see dirty tape, below). What is new is everything around it: the panel, the jacks, the buttons and the saved settings, rebuilt for a module with six knobs, three buttons and six CV jacks.

Beads records whatever comes in, and plays it back as grains — short slices, each with its own pitch, length and envelope. FREEZE stops recording and holds the buffer. SEED fires grains: by hand, latched to the internal clock, or from triggers on the SEED jack. In Synth mode (B3 + B1), Beads plays grains from its own wavetables instead: FEEDBACK picks one of twelve banks, and TIME sweeps through it.

Named — like everything here — after the nursery rhyme: eight for a wish, the line the channel takes its name from. Not affiliated with, or endorsed by, Mutable Instruments or Hermetic Modular.

Controls

The six knobs are Beads’ six big ones.

Knob Job
TIME where in the buffer grains start; plus CV on J6
SIZE grain length: shortest at about half past ten; clockwise of that grains play forwards and grow to four seconds, anticlockwise they play backwards and grow too; plus CV on J7
SHAPE grain envelope
DENSITY noon is no grains; anticlockwise regular, clockwise random; plus CV on J8
PITCH grain pitch, snapping through 0, 1, 3, 4, 7, 12 and 24 semitones; plus V/oct on J3
DRY/WET the mix

Hold B3 and the same six knobs become the second layer: Beads’ four attenuverters, as randomisers, plus two of its small knobs.

Held B3 Job
TIME random how far TIME wanders
SIZE random how far SIZE wanders
SHAPE random how far SHAPE wanders
FEEDBACK on the DENSITY knob: how much of the output goes back into the buffer
PITCH random how far PITCH wanders
REVERB on the DRY/WET knob: reverb amount

A randomiser at noon does nothing. Clockwise, every new grain gets the same degree of randomness, set by how far you turn; anticlockwise, the degree is itself random, so some grains stay where you set them and others land anywhere. In delay mode they become a smooth random wander instead, faster clockwise. The second layer is saved, and picks up a knob once you turn it past its saved value.

Button Job
B1 FREEZE, on and off
B2 SEED: press for a grain, hold to keep seeding. Hold 4 s, or hold B2 and press B1, to latch the internal clock — how Wish starts
B3 tap for QUALITY: Beads’ four recording media, digital, vintage digital, clean tape and dirty tape. Hold for the second layer
B3 + B1 input: Mono (J1 only), Stereo, or Synth (no input, Beads’ wavetables)
B3 + B2 J10 carries Beads’ grain gates instead of audio R
In Job In / out Job
J1 audio in L J6 TIME CV
J2 audio in R J7 SIZE CV
J3 V/oct J8 DENSITY CV
J4 SEED trigger J9 audio out L
J5 FREEZE gate J10 audio out R, or grain gates

B3’s top LED shows the quality in Beads’ own colours; the one beneath it is the input level, blinking while the automatic gain is still settling.

Making a capture to play

  1. Patch a sound into J1 and play the phrase you want.
  2. Tap B1 at the moment you want to keep it. Its LEDs light: the buffer now holds the audio just before the tap.
  3. Play it as a texture: DENSITY clockwise of noon for a cloud, TIME to choose where in the capture, SIZE for grain length, PITCH to transpose.
  4. Or play it from a sequencer: gates into J4, pitch into J3. Each trigger plays one grain at that pitch. With SEED latched, as Wish starts (B2 breathing amber), DENSITY fully clockwise plays every trigger, noon none, and anticlockwise divides them. A press of B2 unlatches it; hold B2 for 4 s to latch it again.

Turn DRY/WET fully clockwise to hear only the capture, and tap B1 again to record a new one.

Delay mode

Turn SIZE fully clockwise and Beads stops making grains and becomes a delay. Clocked from SEED — triggers on J4, or B2 tapped in time — it follows that tempo, and DENSITY picks the division. SIZE random (hold B3, P2) becomes the delay’s filter: anticlockwise low-pass, clockwise high-pass, noon none.

Differences from Beads

Provenance

The DSP is Mutable Instruments Beads by Émilie Gillet, MIT-licensed, from pichenettes/eurorack. Built on Hermetic Modular’s MIT-licensed Alchemy SDK and Electrosmith’s libDaisy. Wish itself is MIT. Thanks to Émilie for opening the code up, and to Luke Pendergrass at Hermetic Modular for the Alchemy SDK.

Flash it — no compiler needed

The Alchemy Lab ships with Hermetic Modular's own bootloader, so there is nothing to install first and no SD card involved. The firmware goes on over the front-panel USB-C from a web page. No compiler needed.

Read this first — Not the Daisy route. There is a Daisy Seed inside, but do not use the Daisy Web Programmer or a .bin on an SD card — the Alchemy Lab has its own bootloader, and its own programmer.
  1. Download the .bin above.
  2. Connect the Alchemy Lab's front-panel USB-C to your computer.
  3. Power on while holding B3. The rings spin a warm-white comet, then breathe slowly: the module is waiting for firmware.
  4. Open the Hermetic Modular Web Programmer and load the .bin.
  5. When it finishes, power-cycle. B2's LEDs breathe amber — the internal clock is seeding grains.
Building from source? make program-live reflashes a running Wish over USB with no buttons at all. It needs node and dfu-util 0.11 or later; the firmware README has the rest.

Updated October 2026