Jomox Mod FM D - desktop hybrid 8-voice multitimbral FM synth

Ooh, this looks a bit of a dream as far as hands-on FM programming goes :slight_smile:

Specifications:

  • 8 voices fully multi timbral FM synth
  • 4 operators per voice
  • Full modulation matrix / 26 algorithms
  • 2 LFO/VCOs per voice
  • Balanced stereo 1/4" jack outputs
  • Stereo Hi-Z 1/4" jack inputs
  • Analog effects mix
  • Outputs for each voice plus mix out
  • CV/Gate per voice
  • CV modulation inputs per operator
  • True audio FM modulation inputs
  • True analog filters per voice
  • 24db low pass
  • 12dB multimode LP/BP/HP cont. shape
  • True analog VCAs per voice
  • Midi in, out
  • USB C device
  • Digital reverb, 2x stereo delay
  • Full storeability, also CV amounts
  • 128 presets, 118 multi sets
  • 2x 128x64px OLED displays

I remember looking at the Eurorack module and thinking it sounded really nice, but had my doubts about its useability/UI considering that often seems a common complaint with Jomox stuff. Does anyone know how it is in use? I haven’t seen many comments about it anywhere, probably because it really looks like it should’ve been a desktop unit from the start.

Edit: ÂŁ1000 at Thomann, a lot cheaper than I expected actually considering analog VCAs, two filters per voice etc.

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This thing looks extremely interesting.
I assume it has no kind of bus overdrive, but I wonder if is is possible to verdrive vcfs and/or vcas.

Edit: And possible to tune the operators freely (like on the Hydra :+1:) instead of stepping to harmonics (like on Opsix, Digitone :-1:).

Edit: I know that it is possible on both, but it is not as convenient and hands-on as on the Hydra.

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Looks very tempting indeed. As far as I know it’s more or less the same like the Eurorack-Version that’s been available for almost a year now. Haven’t come across any real reviews yet… ?

I haven’t gone through all of it but sound-wise this seems to be the best demo out there for the Eurorack version just now. Should be pretty thorough at 40 minutes too!

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Sure? Ratio offset page?

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Some things that stood out on reading the full details:

  • Each operator can run in an overtone mode, this can be fun to switch to on U-he’s Bazille, so a nice option to have.

  • The per-voice LFOs can run at audio rates, track the keyboard and can be mixed into the audio signal path.

  • The dual filters can be mixed independently, presumably they run in parallel.

Assuming there aren’t any obvious dealbreakers or UI issues I think I’ll buy one of these. I’m pretty picky about adding things but the one thing I’ve always felt I’m missing is a nice, hands-on FM synth. The Iridium didn’t really do it even though using wavetables for it was amazing because I hated how reliant on the touchscreen kernels mode was.

I know, but it’s on the second page :wink: Likewise, on the Opsix one has to go into the menus.

That’s a brilliant video, so honest and down to earth. No lightning-quick edits, super-fancy multi-camera setups or what have you, just one somewhat tired German mad scientist going through the features of a new creation. :smiley:

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I’ve been on the fence about the euro version a few times, I think the primary complaint owners had was around the implementation of multi mode and the creators lack commitment to fixing it. I wonder if this means some updates are coming.

  • it was that CV controls all patches when multimode is active, probably more of a deal breaker in the euro format than the desktop in a way.
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I would wait for the Digitone II. :wink:

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Yeah, I’m only a few minutes in but it reminds me of YouTube’s days of yore when it was more enthusiasts bumbling awkwardly through things in a genuine attempt to be helpful rather than on some self-promoting grift.

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Doesn’t the digitone allow you to offset from the harmonics ?

EDIT: sorry should have read the whole thread first.

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Tonverk it will be!

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if this had a proper sequencer it would send the digitone (1) to retirement…

I’ve also checked now the manual (which is written in a nice and funny way), and it seems like it’s the default mode, called “Overtone Mode 0” (because it does not lock to Overtones):

“Operator Pitches in Semitone Steps”

But really only semitone steps? And 000 - 127 are semitones? That would be over 10 octaves … and semitones do not match up with overtones (except octave [and fifths and fourths almost]) … very unusual

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And to nitpick something, the manual says “and only then [when the operators lock to harmonics], harmonic and tonally playable sounds are produced” … which is of course not true at all :wink:

Analog filters, juicy Jomox analog envelopes/VCAs on an FM synth?!

= Instabuy!!!

Nice no talking demo from the same channel as earlier:

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I know you’ve been checking the manual so you’ve probably seen this, but just in case:

FM engine, VCOs and noise generator can be mixed in any ratio. These signal levels (INP / Input) can overdrive the filter input stage, if desired. This creates saturation effects or distortion that can be used to shape the sound.

One things that’s a bit of a shame is that despite the audio rate LFOs the filters can only be affected by a non-loopable envelope, so no filter FM… On the Eurorack version, at least.

Edit: The filter actually does have an LFO, it’s not clear if that can also go into audio rates though.

Also, despite there being MIDI I/O on the module there’s no mention of velocity or aftertouch. I could sort of understand this in Euro land when you have CV jacks but it’d be very weird if the desktop didn’t have that functionality. Pretty essential on an FM synth.

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That looks like a brilliant bit of kit. If I had the funds I’d not hesitate.

I got quite interested by the desktop version because the eurorack demos sounded pretty good but all feedback are about bugs and unfinished firmware (as it seems to be always the case with Jomox.)
Someone on Audiofanzine even report that in the current state the multi mode is unusable.
I haven’t seen any demo in that mode either sadly …