The Usual Suspects JE8086 - Bit-perfect emulation of the JP-8000 is here!

[teilo]

Once thought to be impossible due to Roland's undocumented ESP chip, The Usual Suspects have succeeded in reverse engineering the instruction set of the JP-8000, and have released a bit-perfect emulation. Public beta came out within the last hour.

Mac, Windows, Linux.
VST2, VST3, AU, CLAP, LV2

https://dsp56300.wordpress.com/je8086/

NOTE: You need the JP-8000 ROM to run this. If you have a JP-8000, and still have the .MID files used to update it, those may be used in lieu of the ROM file.

[beely]

Note that it doesn't (yet) support the JP-8080 mode, for those about to ask.

[PAK]

Edit: Associated talk now on Youtube..



It can also be found on CCC's website here..
https://media.ccc.de/v/39c3-from-silico ... sizer-dsps

[teilo]

Associated talk should go up here at some point..


In the meantime it can be found on CCC's website here..
https://media.ccc.de/v/39c3-from-silico ... sizer-dsps

I watched it live. It's a great lecture.

[vanerio]

These guys are brilliant. It's incredible what intelligence and passion can do together. Thank you!

[xhunaudio]

Again, my usual congrats to The Usual Suspects Team for their amazing knowledge and talent.

Just one question if I could (to the DSP56300 website master) : is there a way to set something like "version=Latest" in the query, so it's simpler to look for the latest release instead of specifying the exact version number each time ?

Example URL (some letters are omitted to avoid direct links) :
ht.ps://dsp56300..../......./down.....html?version=2.0.0&product=...&format=.....&os=....

becomes :

ht.ps://dsp56300..../......./down.....html?version=Latest&product=...&format=.....&os=....

This is because it's a little difficoult to keep track of the exact version number each time, and the github release page contains 300+ different builds for each update, very difficoult to navigate.

That would be the cherry on the top of the cake.

[beely]

Not yet, but I submitted this as a feature request a few days back, for the same reasons.

[autodafe]

I made a demo video about the new Beta version, dealing with A/B (or upper/lower parts) and also parameter automation

[aMUSEd]

Seems to have a much better skin than the others, maybe they got someone more skilled in to do it?

[autodafe]

I watched it live. It's a great lecture.

indeed !!!

[metalifuxx]

Seems their site/server got overloaded, none of the download links work?

[ffx]

Very nice skins on each of the synths now, crisp readable fonts, high res, fast, scalable. Nice job! Also i've read it is using a html engine, right? Also nice approach.

[beely]

Seems their site/server got overloaded, none of the download links work?

Works fine here, maybe at your ISP end?

Very nice skins on each of the synths now, crisp readable fonts, high res, fast, scalable. Nice job! Also i've read it is using a html engine, right? Also nice approach.

Yes, it's a CSS/HTML based thing now (specifically, it uses the RMLUI library).
https://dsp56300.wordpress.com/2025/08/ ... ng-system/

[Passante]

What should I do with the mid 00001...00014 files? The plugin is running regardless.

[Rastkovic]

I've always suspected, that a key component of the JP8k's distinctive sound is the filter. And indeed, it sounds great (in my opinion).