RS060 Dr Böhm Dynamic 12/24 (Orla DSE): German EFF EHM

video upload by rejected synths

"Talking synths from Germany, quite a few companies come to mind: Waldorf, Doepfer or Vermona are popular ones still around and there are a lot more, some of them long gone like pioneering PPG. One company that hardly ever makes the list is Dr Böhm Organ. This might be down to the fact that Böhm weren’t exactly a company focused on synths at all but rather one that offered DIY kits for people to build themselves electronic organs.

Strictly speaking these organs were ‘synths’ too and when the 80s arrived, Böhm, just like companies like Sequential, Roland or Yamaha, started to utilize digital control and later digital synthesis in their ‘synths’ too, albeit utilizing interfaces more akin to traditional organs.

One other similarity to ‘real’ synth companies was that they also started to offer expander modules, that could be controlled by midi, expanding the variety of sounds while at the same time saving on space (no keyboard) and costs.

This is where today’s synth comes from. The Dynamic 12/24 was meant as an affordable way for Böhm’s customers of home owners and entertainers to expand their setup with some more organ but also other sounds like strings, e-pianos and some 80s-ish synth staples.

The technology used was taken from one of it’s electronic organs and while clearly trying to hide it (even going as far as filing the markings off the ICs) it was Yamaha FM Chips doing Yamaha sounding 4OP FM. The good thing is of course, that this is actually a great basis for a very wide range of sounds, especially as Böhm was kind enough to add user memory to enable creation and saving of your own patches. Also, editing can be done via midi and there are editors available too. What makes the 12/24 stand out from the crowd of 4 OP modules most though is the unique Böhm analog bucket brigade delay style ensemble effect, that ‘warms’ the FM sound.

Last but not least, the Dynamic 12/24s seem to be widely available and dirt cheap too, at least here in and around Germany. So grab one before they become cool, or anyone finds out they are actually the same as the Orla DSE, a synth that has been used by a guy that goes by the name of Richard David James…"

Orla DSE 24 editor on Ctrlr - FM sound Made in Italy

video upload by VSMI - Vintage Synths Made in Italy

"Bohm/Orla DSE 12/24 Editor on Ctrlr panel
https://ctrlr.org
thx to the creator! I download this Panel many years ago and I can't find nothing about it now!
If you know somethings more, I will glad to update this lines...
What a wonderful FM sound!!
Viscount EFX 100 reverb"

Orla DSE 24 Live Random Ipad Jam - 1986 FM Dynamic Sound Expander Made in Italy

Published on Nov 18, 2019 VSMI

"Orla DSE 24 (solo) - 1986 FM Dynamic Sound Expander Made in Italy - Live Random Jam with NodeBeat HD, Fugue Machine, AUM on Ipad2, Farfisa MC49 Controller Keyboard, Montarbo DREV 128 echo effect."

You can find a few pics of the Orla DSE 24 in the archives here. I believe this is the first video/audio of one to be featured on the site.

ORLA DSE 24 VINTAGE 80s SYNTHESIZER

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via this auction

According to the listing, the DSE 24 is the same synth as the BOHM 12/24. You can see a demo of the BOHM here.

"Italian FM expander from the eighties rebranded from the German model Böhm 12/24originally based on Yamaha FM chips.

There are 2 rackmount models:
- DSE 24: voices polyphony
- DSE 12: voices polyphony

info RACKMOUNT a single unit. Main panel features a simple segments display, 15 buttons and 1 volume knob. All available synthesis functions are printed above the rack.

Back panel terminal connectors:
- master out
- Midi interface
- tape interface
- footswitch input for patch increase

edit VOICE 24 voices, hardware is based on Yamaha YM genuine chips:
- 4 oscillators operators
- 8 connection diagram algorithms

edit SYNTHESIS concept is close to 4 OP Yamaha TX-81Z but with only sinewave with no harmonic variations. There are 4 sinewave operators organized as algorithms, assigned as carrier or modulator linked between them on different pathways interacting on their harmonic contents depending on the variable feedback strength.
- carrier: defines the amplitude and the spectral frequency
- modulator: sets the sound timbre and the relative harmonic contents.
The module offers 32 different combinations algorithms with frequency ratio or fixed frequency: the output is fed back to its input with 7 different levels feedback, as general rule, high values feedback results in richer harmonic contents.

fm synthesis

lfo LFO 2 delayed modulators with variable depth amount, 2 destinations:
- amplitude
- pitch

fx ENVELOPE5 EGs:
- 1 EG for each OP: 4 segments +1 sustain time
- 1 EG pitch and 7 preset templates
- EG scaling tracking amplitude on lower or higher octaves.

family MIDI implementation responds to Midi System Exclusives dump.

performance PERFORMANCE up to 16 different parts with some functions:
- monophonic mode with glide option
- voices stack
- detune mode

memory MEMORY machines exists in 2 different OS versions (ROM sets):
- 1 bank of 100 patches
- 2 banks of 100 patches

EFFECT internal analog chorus based on BBD TDA 1022."

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Orla DSE 24 (DSE24) Expander vintage Midi Synthesizer

via this auction

Googlish translation of auction details: "Orla DSE vintage 24 (DSE24) expander MIDI synthesizer (baugl. Bohm)

Great device with extensive possibilities for sound design. Bubbling, hissing noise, vibration, ... 4 oscillators. With a manual and a brochure will be presented in the device. It is similar to the dynamics of Bohm 12/24 and includes all the extensions. Flawless function and very good condition! Without power cord, it is the usual rubber connector."

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