OP-1 & OP-1 Field

Browser patcher for the original OP-1: new synths, effects, a quad LFO, Euclidean sequencer, MIDI CC and scale mode.

Emulator for the original OP-1 that runs your own firmware.

A four-track groovebox for the FM-1 with three synths and a drum machine. Record a loop, turn it into a song, then rear…

Browser firmware builder for the original OP-1: pick synths, effects and tools, including op1r ports, and build locally.

Plugin manager firmware for the original OP-1: a small core, with each synth, effect and feature a file you copy onto t…

GUI for op1repacker.

Build sample chains for OP-1 Field, OP-XY, OP-Z, M8 and others.

Registry of the names and numbers each OP-1 mod adds, so mods and their sounds don't clash.

MIT SDK and simulator for writing original OP-1 engines, effects and sequencers in C, with a six-engine op1plus image w…

CLI tool for converting between REX loops, Elektron, Dirtywave M8, Polyend Tracker, Ableton, Renoise, OP-1, OP-XY, and…

A free patch for the original OP-1's final firmware, 246. It adds a KEYS synth engine, chord mode, scales, a piano-roll…

OP-1 Field patch format notes and tool.

Sends beat-synced LFO automation to the OP-1 field, TX-6 and TP-7 over USB-C or BLE MIDI, as desktop and iOS apps.

A command-line tool that unpacks and repacks OP-1 firmware, so you can change what's inside and apply ready-made mods.…

Make OP-1 and OP-Z patches from any audio.

Raspberry Pi backup tool.

Firmware and hardware research notes.

An unofficial archive of almost every firmware version for the original OP-1, with each version's build details and cha…

Ultraportable Raspberry Pi Zero backup appliance for the OP-1, no computer required.

Java utilities to split stereo and drumkits and pack samples into OP-1 drumkits.

Bootloader fix for new firmware versions of Teenage Engineering OP-1

Blackfin CPU support for Ghidra, the disassembly groundwork the 2026 OP-1 mods credit; see also op1-decryptor.

Library plus CLI programs to manipulate AIFF files in OP-1's patch and sample format.

An unofficial archive of almost every firmware version for the OP-1 Field, with release dates and change logs. It's use…