ORLA DSE 24 VINTAGE 80s SYNTHESIZER

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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."