KOSMOS – A Generative MIDI Sequencer for RP2040 (DIY Project)

You might recall KOSMOS from previous posts here. Plantssystem aka GreyScale wrote in to let us know the source code has been released. Details and link to the github repository follow.

"KOSMOS is a compact, self‑contained generative MIDI sequencer built on the Raspberry Pi Pico (RP2040).

Power it on, and it immediately begins producing evolving melodic patterns — no DAW, no clock source, no setup.

The project combines a Euclidean rhythm engine, Japanese‑mode melodic generation (Hirajoshi / Insen / Miyakobushi),
and a 240×240 LCD UI for real‑time visualization of steps, probabilities, and phrase movement.

A small instrument with a surprisingly expressive voice.

---

CLICK FOR MORE »

GreyScale-KOSMOS #greyscale #kosmos #generative #sequencer

video upload by plantssystem

"KOSMOS – a generative sequencer built on GreyScale – controlling the legendary Prophet‑5.
This short clip captures KOSMOS creating evolving melodic patterns in real time, while the Prophet‑5 responds with its unmistakable analog tone.
A small brain driving a giant synth.

#generativemusic #sequencer #prophet5 #raspberrypi #diyinstrument #euclideanrhythm
---
GreyScale ベースのジェネレーティブシーケンサー「KOSMOS」が Prophet‑5 をコントロール。
KOSMOS がリアルタイムで生成するフレーズに、Prophet‑5 がアナログの深い響きで応える瞬間を収めました。
小さな装置が大きなシンセを動かす、その“生命感”を感じてください。"

GreyScale-KOSMOS #raspberrypi #pico #rp2040 #midi #sequencer #algorithmic #generative #kosmos

video upload by plantssystem

Follow-up to this post.

"KOSMOS – A Compact Generative Sequencer Driving the Prophet‑5

This short clip features KOSMOS, my standalone generative MIDI sequencer, controlling a Sequential Prophet‑5. KOSMOS creates evolving melodic patterns and rhythmic variations in real time, while the Prophet‑5 provides its unmistakable analog warmth and depth.

The performance is completely autonomous — no DAW, no external processing — just KOSMOS generating the sequence and the Prophet‑5 responding with its classic tone.
It’s a small glimpse into how KOSMOS interacts with hardware synths and how expressive the pairing can be."

GreyScale – A Standalone MIDI Sequencer KOSMOS Powered by Raspberry Pi Pico (RP2040)

This one is in via GreyScale aka plantssystem whose videos you have likely seen on the site.

"GreyScale is a compact, self‑contained MIDI sequencer built entirely around the Raspberry Pi Pico (RP2040).

Its minimal hardware footprint hides a surprisingly deep generative engine, combining Euclidean rhythm generation, step sequencing, probability control, and evolving melodic behavior.

The clean GreyScale UI provides immediate visual feedback — step activity, Euclid parameters, probability states — all rendered on a crisp LCD. A joystick and four dedicated buttons offer fast, tactile control, keeping the workflow musical and instrument‑like rather than menu‑driven.

GreyScale runs completely standalone with standard MIDI output, making it an ideal partner for hardware synths, desktop modules, or DAW setups.

Designed for spontaneity and long‑form generative performance, it encourages exploration and rewards experimentation. A small instrument with a refined feel, GreyScale blends DIY charm with a polished, modern sequencing experience."

Update: demo here.

CLICK FOR MORE »

PlantsSystem-Kosmos

video upload by plantssystem

""Kosmos" was created with a Prophet-5 and a BOSS SE50.
#ymo #sequential #dtm"