OB-Xd VS dexed

[2] - https://github.com/reales/OB-Xd

OB-XD (virtual analogue style synth)

You can download older versions from GitHub here (under Assets): https://github.com/reales/OB-Xd/releases

OB-Xd (free and paid)- https://www.discodsp.com/obxd/

Oberheim OB-X did this. The free OB-Xd VST will do the same - https://www.discodsp.com/obxd/

All in one no but here's two good free synths : OB-XD and Dexed

OBX https://www.discodsp.com/obxd/

Did you already find https://github.com/asb2m10/dexed/wiki/Dexed-as-a-DX7-editor ?

There's a full DX7 emulator available for free (think FM8, but open-source). It's at: https://github.com/asb2m10/dexed/releases For the original DX7 sounds (including the classic EPs and basses), there's a .tar file containing a bunch of SysEx backups here: https://homepages.abdn.ac.uk/d.j.benson/pages/dx7/syx/sysex.tar The main page that lists some other files and other general information is here: https://homepages.abdn.ac.uk/d.j.benson/pages/html/dx7.html There are a bunch of sysex dumps in that .tar file, some with other patches, some duplicates, but all worth trying out. The original ROM dumps have names that, oddly enough, start with "rom" (so rom1a, rom1b, rom2a, etc). A page that goes into some good detail on each patch is here: https://www.synthmania.com/dx7.htm By combining Dexed with the SysEx dumps above, you can get a very lightweight DX7 for a grand total of $0. It takes way less RAM than FM8, and it's Apple Silicon Native now, too! I used this plugin a TON for Joseph, to get that 80s synth vibe.

MicroDexed Touch is a fork of MicroDexed which is a port of Dexed for Teensy 3.6/4.1 with a lot more functionality including multiple sound engines (2 x 16 voice DX7, 2x VA Monosynths, Layered Multi Samples, MDA ePiano, 8 voice Mutable Instruments Braids Oscillator), basic audio effects and a 8 track pattern song (tracker like) sequencer.

If you want an FM synth specifically to use in your DAW of choice you have plenty VSTs, both free and paid and even included in FL Studio itself, which do much more than the Volca, but there's a trade-off, you lose some imediacy but get much more power.

I downloaded dexed-0.9.6-win.exe from https://github.com/asb2m10/dexed/releases/download/v0.9.6/dexed-0.9.6-win.zip and installed it in its default location: C:\Program Files\Dexed for the stand-alone app.

How familiar are you with how this sort of genre is produced? You could certainly do it in a DAW, there are cheap/free ones available like Reaper or Bandlab, plus many free VST instruments that you can use as plugins.

Maybe grab Dexed - https://www.kvraudio.com/product/dexed-by-digital-suburban https://github.com/asb2m10/dexed

Its called DETUNE parameter. But I can't find information about units. Issue is discussed here: https://github.com/asb2m10/dexed/issues/88 but I don't know how to interpret that table.