Behringer 2-XM (Oberheim 2Voice)



Hab mal den Text per copy&paste hier reingehauen, hoffe, das ist ok. Die automatische Übersetzung klang mir einfach zu schräg.

The Behringer 2-XM is a compact, dual-voice, Eurorack-compatible synthesizer inspired by the classic Oberheim SEM. As a long-time fan of the SEM (disclaimer: I’ve only used the remake, not the 1970s original), I was curious to see how this budget alternative holds up.
The 2-XM features dual analog signal paths, unison, split, and duo modes, and can be chained for polyphony (though I haven’t tried that). It also includes a small semi-modular patch bay, which adds some flexibility.

Sound-wise, I find the original SEM (again, referring to the modern remake) to be richer and warmer, although it's a quite generic statement. Let me try to explain: The 2-XM’s filters sound good, but they lack that high-end boost you get when pushing the original into more extreme settings. Where the original behaves almost like an exciter in those situations, the 2-XM leans more toward a whistling character that doesn’t blend as smoothly with the rest of the signal, at least compared to other SEM-style filters I’ve worked with. The oscillators in the 2-XM also sound a bit harder and more modern. That’s not necessarily a bad thing, but I missed the more elusive, vintage flair.

While it doesn’t bring anything particularly groundbreaking, it’s a reasonably priced option for those looking to explore analog synthesis with a classic flavor. I especially appreciate the ability to cross-modulate both units, enabling VCO FM, filter FM, and a few other tricks. However, I did miss noise out (you can work around that as shown in one of the examples), having an LFO frequency rate input in the patch bay—it would’ve been great to extend the modulation range or tie it to key tracking. I also encountered some odd behavior in dual mode when using portamento. Occasionally, one voice would cut out, and the envelope wouldn’t trigger properly. It’s possible that I did something wrong, but it’s worth noting.

Some might find the 2-XM’s interface a bit cramped, though I could work with it. The potentiometers are okay, but especially in duo mode, they feel a bit too small for precise adjustments—larger caps might help. The switches don’t feel great, either — not a deal-breaker, but something to be aware of.

TL;DR: The Behringer 2-XM delivers some solid Oberheim-inspired tones, though it doesn't quite capture the magic of the original. Still, it offers two good-sounding analog voices at an accessible price.
 
Da es ja Probleme mit MIDI und MIDIpal für polyphones Spiel zu geben scheint, wie wäre es mit einem Vierkanal-MIDI-CV-Interface? Vielleicht böte ein solches auch verschiedene Optionen der Stimmallokation.

Hier stellt Firechild sein Setup mit vier Tom Oberheim SEM Pro vor. Er nutzte Reaper mit einem Round-Robin-Skript.

 
Das liesse sich sicher mit einem RP2040 Zero für ein paar Euro und ein paar Tastern für die Optionen gut realisieren. Der RP2040 kann auch USB Host, sodass man auch ein USB Keyboard anschliessen könnte.
Das ganze in ein kleines Gehäuse und der Spass könnte losgehen ;-)
 
Da es ja Probleme mit MIDI und MIDIpal für polyphones Spiel zu geben scheint, wie wäre es mit einem Vierkanal-MIDI-CV-Interface? Vielleicht böte ein solches auch verschiedene Optionen der Stimmallokation.

Hier stellt Firechild sein Setup mit vier Tom Oberheim SEM Pro vor. Er nutzte Reaper mit einem Round-Robin-Skript.



Ginge da nicht auch evtl. eine MPU-101?

Stephen
 

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