Elektron Analog Four OS 1.55 Adds Euclidean Sequencer & Control All

TL;DR: Elektron has released OS 1.55 for the Analog Four and Analog Keys, bringing a Euclidean sequencer mode, Control All for global parameter tweaking, and several workflow enhancements like Page Loop and arpeggiator rotation. The update is free for both MKI and MKII hardware, and it’s a compelling reason to dust off your Analog Four.

• New Euclidean sequencer mode with two independent generators for algorithmic pattern generation.
• Control All lets you tweak parameters across all four tracks simultaneously, with undo support.
• Page Loop enables jumping to and locking specific sequencer pages for focused editing.
• Arpeggiator now supports Rotate Arpeggiator Sequence for fresh melodic variations.
• Free update for both MKI and MKII hardware, available now at elektron.se.

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Euclidean Sequencer: The Star of the Show

We at Noxal have a soft spot for algorithmic mayhem, and Elektron’s new Euclidean sequencer mode delivers exactly that. The update introduces two independent generators that distribute pulses algorithmically across a sequence. You can combine them, offset them against each other, and tweak them in real time. The result? Patterns that shift and interlock in ways that are surprisingly hard to achieve through manual programming.

This isn’t just a gimmick. Euclidean sequencing, rooted in the mathematical principles of Bjorklund’s algorithm, creates rhythms that feel organic yet structured. For a synth like the Analog Four, which already boasts a powerful sequencer, this addition opens up new territory for generative and evolving patterns. I’ve spent a few late nights with it, and I can confirm: it’s the kind of feature that makes you rethink your entire workflow.

The beauty here is that it’s not a one-trick pony. You can blend the two generators, adjust their offsets, and even use them in combination with traditional step programming. It’s a tool for both chaos and precision, and it works on both MKI and MKII hardware. If you’ve ever envied the Euclidean capabilities of Eurorack modules, this is your ticket in.

Control All and Workflow Improvements

Elektron’s Control All feature is a deceptively simple addition that could save you hours of menu diving. Hold the Track button, turn a knob, and you’re tweaking that parameter across all four tracks simultaneously. Need to roll back? No problem—the result can be discarded and the saved state restored. It’s the kind of feature that makes you wonder why it wasn’t there from the start.

Page Loop is another workflow gem. It lets you jump to specific sequencer pages and lock into one or more of them. This is perfect for refining individual sections without disrupting the rest of the pattern. Imagine you’re building a track and want to focus on the bridge without accidentally altering the verse. Page Loop makes that seamless.

The arpeggiator also gets a boost with Rotate Arpeggiator Sequence, which shifts offset positions to open up fresh melodic directions. Combined with the Euclidean sequencer, this turns the Analog Four into a generative powerhouse. And let’s not forget Save Trig to Sound, a small but welcome addition for those who like to save specific trigger settings per sound.

MKI vs MKII: What You Get

One of the best things about this update is that it’s free for both MKI and MKII owners. However, there’s a catch: the class compliant USB audio feature, introduced in OS 1.5, is exclusive to MKII hardware. This means MKI users won’t get direct USB audio to computers, smartphones, or tablets without Overbridge. But the core new features—Euclidean sequencer, Control All, Page Loop, and arpeggiator rotation—work on both generations.

For MKI owners, this update is a lifeline. The Analog Four MKI is still a capable synth, and these new features breathe fresh life into it. The step recording mode, trig probability, and trig preview from OS 1.5 also carry over, so you’re getting a comprehensive package. If you’ve been eyeing a used MKI on Reverb, this update makes it a much more compelling buy.

MKII owners, meanwhile, get the full package including class compliant USB audio. This is a boon for live performers and studio producers who want to integrate the Analog Four into a modern setup without extra interfaces. It’s worth noting that the black facelift for the Analog Four MKII and Rytm MKII coincided with this update, so if you’re after aesthetics and functionality, now’s the time.

Who Is This Update For?

This update is for anyone who owns an Analog Four or Analog Keys and has been craving more generative capabilities. The Euclidean sequencer alone is worth the download, but the workflow improvements like Control All and Page Loop make it a no-brainer. If you’ve been using your Analog Four as a straightforward monosynth or bass machine, these features will push it into new territory.

For producers who lean on hardware for live sets, the Euclidean mode is a godsend. It allows for evolving, non-repetitive patterns that keep audiences engaged without constant manual intervention. And for studio work, the ability to tweak all tracks simultaneously with Control All speeds up the creative process significantly.

However, if you’re a pure DAW producer who’s never touched hardware sequencing, this update won’t magically convert you. The Analog Four’s sequencer is deep, but it still requires a willingness to engage with Elektron’s workflow. That said, for those already in the ecosystem, this is one of the best free updates we’ve seen in a while.

Now if you’ll excuse me, I have a date with my Analog Four and a freshly brewed pour-over. The Euclidean sequencer needs testing, and my coffee needs stirring to the rhythm of algorithmic pulses.