Thread: Korg ms20
That's a good question about the Behringer Model D. I own one. I haven't noticed the issue when plugging it in to Eurorack. I did a search on the internet and also cracked the manual.
The filter doesn't track exactly to 1v/Octave. In the manual, it states that the oscillators track to 1v/Octave (Eurorack standard).
The ARP's circuitry might have influenced Behringer's decision to go with 1V/Hertz versus 1v/Octave. I'd assume that converting it over to 1V/Octave probably changed the performance or the sound of the synth... so they went with the original specs.