Arp Of Darkness
Nocturne Alchemy Platform - Free Swappable Firmwares
New features added in firmware update v1.4.0 - See what they are in this new video:
The Arp Of Darkness is an arpeggiator with a unique twist: it builds dynamic, evolving note sequences using a buffer approach inspired by shift registers and Turing Machines. Unlike traditional arpeggiators that play predefined chord patterns, this module lets you enter notes sequentially into a buffer of variable length — 3 to 16 notes — and play it back in 6 modes: Forward, Backward, Exclusive Ping-pong, Inclusive Ping-pong, Golden Ratio, and Random. Each mode offers both queued and immediate selection, plus reset on the fly.
Golden Ratio Mode is an especially musical one — based on the Fibonacci Sequence, it steps through your buffer using φ-based intervals for patterns that feel both intentional and organic.
You can save and load your buffer to EEPROM — find a phrase you love, save it, evolve it into something completely different, then reload your original to restate the idea.
What's New in v1.4.0 (Updated 05/29/2026)
CV Keyboard Mode
Hold the High C (Shift) button at boot to enter a full monophonic CV keyboard with gate output and portamento via the pot. Play notes directly without swapping firmware.
Remix Buffer
A quick dual-tap of Octave Up + Octave Down shuffles the note order in your buffer on the next clock. Note values stay the same — only the sequence changes. Great for breaking out of a pattern on the fly without losing your phrase.
Auto-Remix
Set the buffer to reshuffle itself automatically every 2, 4, or 8 loops. Activate queued (waits for the end of the current loop) or immediate (fires on the next clock). Deactivate anytime with the same dual-tap.
The Nocturne Alchemy Platform
Each module within the Nocturne Alchemy Platform shares the same robust Arduino-based hardware, allowing you to effortlessly swap functionalities through our intuitive web firmware loader. By purchasing one module, you gain access to the full range of available firmwares — including Arp of Darkness, Slight Of Hand, Seventh Summoner, and Shroud Of Turing — it's like getting multiple modules for the price of just one.
Specifications:
- Height: 1U (Intellijel format)
- Width: 26HP
- Depth: 40mm ("Skiff-friendly")
- Current Draw: 40 mA +12V, 0 mA -12V, 0 mA 5V
Features:
- 4 octaves of control from C0 to C4
- 6 note buffer lengths (3, 4, 5, 6, 8, 16)
- 6 playback modes — Forward, Backward, Excl. Ping-pong, Incl. Ping-pong, Golden Ratio, Random — with cycle select, direct select (queued & immediate), and reset
- Remix Buffer — shuffle note order on the fly with a dual-tap
- Auto-Remix — automatic buffer shuffle every 2, 4, or 8 loops
- Save, load, and clear the buffer to/from EEPROM
- CV Keyboard Mode — boot into a monophonic keyboard with gate out and portamento
- Clock input and CV out calibrated to 1V/0
- Calibration mode with tuning for each note across 4 octaves (Comes pre-calibrated)
Nocturne Alchemy Platform - Free Swappable Firmwares
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