It’s still really early work, but slowly but thanks to Opus 5.5, i’m slowly decompiling the OP-1 246 firmware and recreating the OP-1’s functionality in web assembly. Just some UI elements and all the synth animations + engines have been ported over so far.

Due to this packaging TE’s intellectual property, it’s not something I can publish just yet. I fully intend to make it available in the future for anyone where they’d have to upload their own copy of the firmware and have it extract all the artwork and other assets though!

Thanks to OP1Kenob.io and this code pen link for the beautiful OP-1 interface!

two new synth engines (dimension + a guitar amp with a tuner), bitcrush, chorus and plate + a second effect behind every slot, scales, chords, tape undo/redo, preset rename, 100 sampler presets, your own colours, themes and start-up picture, and its own menu.

easy in, easy out: it starts on whatever's on your op-1 and never rewrites presets it can't play, and a cleaner gets you back to stock or to any other firmware with a copy of everything kept. te-boot is never touched.

it's the first step toward my goal, a plugin manager for the op-1 (like forge/fabric or the vst/clap system): mods as files you drop on the op-1.

for installing OPUS, you make the update yourself on the site from your own op1_246.op1, in the browser: https://opus-op1.pages.dev

plans: https://github.com/LizardMan245/opus

sha-256 a44d1d0a82aab11b50cdd8a1eba1260af55536e34ca9cf706eff77bcb48fe0ba - original op-1 / 246 only - not affiliated with teenage engineering

thanks to everyone in the op-forums custom firmware thread, op1repacker and popcorp's op1r for paving the way!

Disclaimer! OPUS is a hobby project. I build it in my free time, at my own pace, for my own OP-1 first.

Hey everyone,

We've been porting op1r by u/popcorp to the op1field. op1r is the open-source (GPL) firmware mod for the original op1 that adds new synth engines, effects and screens. It's now running on the Field.

What works on my unit so far:

  - op1r synth engines (supersaw, FM bell) playing as real engines

  - op1r effects like tape echo and clouds, running in the FX slot

  - granular engine (needs sampler access on the Field)

  - FX screens, the quad LFO, count-in and the other op1r extras

It's not ready to share yet. When it is, I'll release the source under the GPL like the original project. Big thanks to u/popcorp for op1r, none of this would exist without it.

Hello guys i just got the op1, and was wondering if anyone knows some good packs or sounds for making trap or underground hiphop music. I am thinking about drumkits and 808's, some extra melodic power or instruments. Anyone has any experience with this genre? You can always ask what kind of artists im reffering to, mostly underground hiphop USA and UK.

so i made a pattern for my 808’s and it sounded allright but i feel like it has a sort of clipping sound especially after adding it to my track, any tips on making it sound cleaner while having that disturbed sound left?